/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 12:06:30,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 12:06:30,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 12:06:30,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 12:06:30,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 12:06:30,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 12:06:30,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 12:06:30,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 12:06:30,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 12:06:30,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 12:06:30,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 12:06:30,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 12:06:30,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 12:06:30,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 12:06:30,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 12:06:30,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 12:06:30,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 12:06:30,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 12:06:30,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 12:06:30,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 12:06:30,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 12:06:30,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 12:06:30,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 12:06:30,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 12:06:30,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 12:06:30,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 12:06:30,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 12:06:30,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 12:06:30,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 12:06:30,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 12:06:30,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 12:06:30,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 12:06:30,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 12:06:30,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 12:06:30,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 12:06:30,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 12:06:30,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 12:06:30,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 12:06:30,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 12:06:30,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 12:06:30,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 12:06:30,995 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-11 12:06:31,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 12:06:31,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 12:06:31,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 12:06:31,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 12:06:31,037 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 12:06:31,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 12:06:31,037 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 12:06:31,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 12:06:31,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 12:06:31,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 12:06:31,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 12:06:31,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 12:06:31,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 12:06:31,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 12:06:31,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 12:06:31,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 12:06:31,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 12:06:31,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 12:06:31,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 12:06:31,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 12:06:31,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 12:06:31,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 12:06:31,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 12:06:31,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-11 12:06:31,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 12:06:31,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 12:06:31,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 12:06:31,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 12:06:31,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-11 12:06:31,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-11 12:06:31,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 12:06:31,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 12:06:31,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 12:06:31,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 12:06:31,568 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 12:06:31,569 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-09-11 12:06:31,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3bbc83b7/b61c72028a084526bd8013f9e0b6d351/FLAGd30c13595 [2020-09-11 12:06:32,329 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 12:06:32,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-2.i [2020-09-11 12:06:32,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3bbc83b7/b61c72028a084526bd8013f9e0b6d351/FLAGd30c13595 [2020-09-11 12:06:32,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3bbc83b7/b61c72028a084526bd8013f9e0b6d351 [2020-09-11 12:06:32,604 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 12:06:32,609 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 12:06:32,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 12:06:32,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 12:06:32,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 12:06:32,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74192949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32, skipping insertion in model container [2020-09-11 12:06:32,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 12:06:32,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 12:06:33,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:06:33,252 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 12:06:33,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:06:33,410 INFO L208 MainTranslator]: Completed translation [2020-09-11 12:06:33,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33 WrapperNode [2020-09-11 12:06:33,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 12:06:33,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 12:06:33,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 12:06:33,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 12:06:33,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (1/1) ... [2020-09-11 12:06:33,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (1/1) ... [2020-09-11 12:06:33,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 12:06:33,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 12:06:33,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 12:06:33,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 12:06:33,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (1/1) ... [2020-09-11 12:06:33,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (1/1) ... [2020-09-11 12:06:33,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (1/1) ... [2020-09-11 12:06:33,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (1/1) ... [2020-09-11 12:06:33,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (1/1) ... [2020-09-11 12:06:33,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (1/1) ... [2020-09-11 12:06:33,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (1/1) ... [2020-09-11 12:06:33,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 12:06:33,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 12:06:33,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 12:06:33,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 12:06:33,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (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 12:06:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 12:06:33,601 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 12:06:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 12:06:33,601 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 12:06:33,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 12:06:33,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 12:06:33,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 12:06:33,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 12:06:33,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 12:06:33,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 12:06:33,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 12:06:33,605 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 12:06:33,996 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 12:06:33,997 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 12:06:34,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:06:34 BoogieIcfgContainer [2020-09-11 12:06:34,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 12:06:34,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 12:06:34,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 12:06:34,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 12:06:34,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 12:06:32" (1/3) ... [2020-09-11 12:06:34,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29766b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:06:34, skipping insertion in model container [2020-09-11 12:06:34,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:33" (2/3) ... [2020-09-11 12:06:34,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29766b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:06:34, skipping insertion in model container [2020-09-11 12:06:34,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:06:34" (3/3) ... [2020-09-11 12:06:34,012 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-09-11 12:06:34,024 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 12:06:34,024 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-11 12:06:34,035 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 12:06:34,036 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 12:06:34,063 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,064 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,064 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,064 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,065 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,065 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,065 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,066 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,066 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,066 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,066 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,067 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,067 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,067 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,068 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,068 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,068 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,068 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,069 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,069 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,069 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,070 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,070 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,070 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,070 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,071 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,071 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,071 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,076 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,076 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,076 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,076 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,077 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,077 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,083 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,084 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,084 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,084 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,084 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,085 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:34,106 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 12:06:34,128 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 12:06:34,129 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 12:06:34,129 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-11 12:06:34,129 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 12:06:34,129 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 12:06:34,129 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 12:06:34,129 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 12:06:34,130 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 12:06:34,145 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:34,147 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:34,186 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 12:06:34,186 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:06:34,193 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 12:06:34,195 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:34,214 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 12:06:34,214 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:06:34,215 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 12:06:34,218 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 12:06:34,219 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-11 12:06:35,386 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 12:06:35,631 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 12:06:35,631 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 12:06:35,636 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 12:06:35,661 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 12:06:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 12:06:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 12:06:35,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:35,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 12:06:35,674 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 12:06:35,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:35,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420916565] [2020-09-11 12:06:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:35,977 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 12:06:35,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420916565] [2020-09-11 12:06:35,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:35,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 12:06:35,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916526789] [2020-09-11 12:06:35,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 12:06:35,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:36,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 12:06:36,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 12:06:36,010 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 12:06:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:36,094 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 12:06:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:06:36,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 12:06:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:36,112 INFO L225 Difference]: With dead ends: 75 [2020-09-11 12:06:36,112 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 12:06:36,114 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 12:06:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 12:06:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 12:06:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 12:06:36,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 12:06:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:36,166 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 12:06:36,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 12:06:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 12:06:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:06:36,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:36,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:36,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 12:06:36,168 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:36,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 12:06:36,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:36,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656053923] [2020-09-11 12:06:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:36,261 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 12:06:36,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656053923] [2020-09-11 12:06:36,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:36,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:06:36,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429058485] [2020-09-11 12:06:36,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:06:36,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:36,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:06:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:06:36,265 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 12:06:36,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:36,299 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 12:06:36,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 12:06:36,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:06:36,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:36,301 INFO L225 Difference]: With dead ends: 56 [2020-09-11 12:06:36,302 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 12:06:36,303 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 12:06:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 12:06:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 12:06:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 12:06:36,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 12:06:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:36,312 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 12:06:36,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:06:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 12:06:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:36,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:36,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:36,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 12:06:36,314 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:36,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 12:06:36,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:36,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935112906] [2020-09-11 12:06:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:36,417 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 12:06:36,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935112906] [2020-09-11 12:06:36,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:36,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:36,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196737896] [2020-09-11 12:06:36,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:36,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:36,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:36,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:36,421 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-11 12:06:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:36,527 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 12:06:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:36,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:36,529 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:06:36,529 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:06:36,530 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 12:06:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:06:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-11 12:06:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:36,539 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-11 12:06:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:36,540 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:36,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:36,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:36,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:36,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 12:06:36,542 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:36,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:36,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-11 12:06:36,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:36,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816138414] [2020-09-11 12:06:36,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:36,647 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 12:06:36,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816138414] [2020-09-11 12:06:36,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:36,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:36,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093461384] [2020-09-11 12:06:36,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:36,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:36,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:36,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:36,649 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-11 12:06:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:36,721 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 12:06:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:06:36,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:36,723 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:36,723 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 12:06:36,724 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 12:06:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 12:06:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 12:06:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 12:06:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-11 12:06:36,730 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-11 12:06:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:36,730 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-11 12:06:36,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-11 12:06:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:36,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:36,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:36,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 12:06:36,732 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-11 12:06:36,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:36,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102069347] [2020-09-11 12:06:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:36,833 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 12:06:36,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102069347] [2020-09-11 12:06:36,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:36,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:36,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017063893] [2020-09-11 12:06:36,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:36,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:36,840 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-11 12:06:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:36,967 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-11 12:06:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:06:36,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:36,969 INFO L225 Difference]: With dead ends: 57 [2020-09-11 12:06:36,969 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 12:06:36,970 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 12:06:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 12:06:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-11 12:06:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 12:06:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 12:06:36,976 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-11 12:06:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:36,977 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 12:06:36,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 12:06:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:36,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:36,978 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:36,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 12:06:36,979 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:36,979 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-11 12:06:36,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:36,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375116819] [2020-09-11 12:06:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:37,064 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 12:06:37,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375116819] [2020-09-11 12:06:37,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142461131] [2020-09-11 12:06:37,065 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 12:06:37,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:37,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:37,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:37,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:37,198 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 12:06:37,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:37,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:37,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088463269] [2020-09-11 12:06:37,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:37,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:37,200 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-11 12:06:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:37,341 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-11 12:06:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:37,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:37,342 INFO L225 Difference]: With dead ends: 48 [2020-09-11 12:06:37,342 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 12:06:37,343 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 12:06:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 12:06:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 12:06:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 12:06:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 12:06:37,349 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-11 12:06:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:37,350 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 12:06:37,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 12:06:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:37,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:37,351 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:37,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 12:06:37,554 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-11 12:06:37,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:37,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997409707] [2020-09-11 12:06:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:37,655 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 12:06:37,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997409707] [2020-09-11 12:06:37,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937443738] [2020-09-11 12:06:37,656 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 12:06:37,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:37,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:37,745 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 12:06:37,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:37,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 12:06:37,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110870999] [2020-09-11 12:06:37,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 12:06:37,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:37,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 12:06:37,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:06:37,748 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-11 12:06:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:37,828 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 12:06:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:37,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 12:06:37,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:37,829 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:37,830 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 12:06:37,830 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 12:06:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 12:06:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-11 12:06:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 12:06:37,836 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-11 12:06:37,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:37,836 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 12:06:37,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 12:06:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 12:06:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:37,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:37,837 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:38,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:38,050 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-11 12:06:38,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:38,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187164649] [2020-09-11 12:06:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:38,130 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 12:06:38,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187164649] [2020-09-11 12:06:38,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197514018] [2020-09-11 12:06:38,131 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 12:06:38,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:06:38,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:38,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:38,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:38,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:38,224 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 12:06:38,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:38,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:38,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575602629] [2020-09-11 12:06:38,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:38,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:38,226 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-11 12:06:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:38,361 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-11 12:06:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:06:38,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:38,362 INFO L225 Difference]: With dead ends: 58 [2020-09-11 12:06:38,363 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 12:06:38,363 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 12:06:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 12:06:38,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 12:06:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 12:06:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 12:06:38,368 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-11 12:06:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:38,368 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 12:06:38,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 12:06:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:38,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:38,370 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:38,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:38,571 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-11 12:06:38,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:38,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362506687] [2020-09-11 12:06:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:38,657 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 12:06:38,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362506687] [2020-09-11 12:06:38,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521903198] [2020-09-11 12:06:38,658 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 12:06:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:38,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:38,728 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 12:06:38,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:38,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 12:06:38,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97705750] [2020-09-11 12:06:38,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 12:06:38,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:38,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 12:06:38,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:06:38,730 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-11 12:06:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:38,894 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 12:06:38,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:38,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 12:06:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:38,895 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:06:38,895 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:06:38,896 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 12:06:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:06:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-11 12:06:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-11 12:06:38,902 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-11 12:06:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:38,903 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-11 12:06:38,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 12:06:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-11 12:06:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:38,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:38,904 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:39,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:39,117 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-11 12:06:39,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:39,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634162250] [2020-09-11 12:06:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:39,189 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 12:06:39,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634162250] [2020-09-11 12:06:39,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799604627] [2020-09-11 12:06:39,190 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 12:06:39,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:39,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:39,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:39,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:39,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:39,273 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 12:06:39,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:39,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:39,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957794450] [2020-09-11 12:06:39,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:39,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:39,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:39,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:39,276 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-11 12:06:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:39,501 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-11 12:06:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:39,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:39,503 INFO L225 Difference]: With dead ends: 62 [2020-09-11 12:06:39,503 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:39,504 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 12:06:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-11 12:06:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-11 12:06:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-11 12:06:39,509 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-11 12:06:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:39,509 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-11 12:06:39,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:39,509 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-11 12:06:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:39,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:39,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:39,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 12:06:39,723 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:39,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-11 12:06:39,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:39,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029879549] [2020-09-11 12:06:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:39,849 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 12:06:39,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029879549] [2020-09-11 12:06:39,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237458335] [2020-09-11 12:06:39,849 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 12:06:39,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:06:39,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:39,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:39,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:39,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 12:06:39,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600127710] [2020-09-11 12:06:39,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:39,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:39,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:39,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:39,916 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-11 12:06:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:40,050 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-11 12:06:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:06:40,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 12:06:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:40,052 INFO L225 Difference]: With dead ends: 64 [2020-09-11 12:06:40,052 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 12:06:40,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:06:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 12:06:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 12:06:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 12:06:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-11 12:06:40,057 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-11 12:06:40,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:40,058 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-11 12:06:40,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-11 12:06:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:40,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:40,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:40,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:40,271 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:40,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-11 12:06:40,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:40,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269203782] [2020-09-11 12:06:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:40,368 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 12:06:40,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269203782] [2020-09-11 12:06:40,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982656904] [2020-09-11 12:06:40,369 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 12:06:40,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:40,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:40,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:40,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:40,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:40,474 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 12:06:40,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:40,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:40,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428934817] [2020-09-11 12:06:40,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:40,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:40,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:40,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:40,478 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-11 12:06:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:40,689 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-11 12:06:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:40,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:40,691 INFO L225 Difference]: With dead ends: 61 [2020-09-11 12:06:40,691 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:40,692 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 12:06:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-11 12:06:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 12:06:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 12:06:40,703 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-11 12:06:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:40,704 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 12:06:40,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 12:06:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:40,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:40,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:40,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:40,918 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-11 12:06:40,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:40,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776023889] [2020-09-11 12:06:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,024 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 12:06:41,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776023889] [2020-09-11 12:06:41,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72605205] [2020-09-11 12:06:41,025 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 12:06:41,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:41,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:41,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:41,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:41,120 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 12:06:41,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:41,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 12:06:41,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131831090] [2020-09-11 12:06:41,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:41,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:41,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:41,125 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-11 12:06:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,280 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 12:06:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:41,280 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 12:06:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,281 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:06:41,282 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:06:41,282 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 12:06:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:06:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-11 12:06:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 12:06:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-11 12:06:41,299 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-11 12:06:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,299 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-11 12:06:41,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-11 12:06:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:41,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 12:06:41,516 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-11 12:06:41,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780285657] [2020-09-11 12:06:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,593 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 12:06:41,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780285657] [2020-09-11 12:06:41,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838559308] [2020-09-11 12:06:41,594 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 12:06:41,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:06:41,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:41,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:41,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:41,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:41,686 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 12:06:41,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:41,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:41,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293228457] [2020-09-11 12:06:41,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:41,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:41,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:41,688 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-11 12:06:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,953 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-11 12:06:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:41,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,954 INFO L225 Difference]: With dead ends: 58 [2020-09-11 12:06:41,954 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 12:06:41,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:06:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 12:06:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-11 12:06:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-11 12:06:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-11 12:06:41,957 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-11 12:06:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,958 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-11 12:06:41,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-11 12:06:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:41,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:42,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:42,163 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:42,163 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-11 12:06:42,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:42,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864189198] [2020-09-11 12:06:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:42,236 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 12:06:42,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864189198] [2020-09-11 12:06:42,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930441563] [2020-09-11 12:06:42,237 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 12:06:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:42,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:42,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:42,313 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 12:06:42,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:42,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:42,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110943134] [2020-09-11 12:06:42,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:42,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:42,317 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-11 12:06:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:42,540 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-11 12:06:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:42,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:42,542 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:42,542 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:42,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:06:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-11 12:06:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:42,551 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-11 12:06:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:42,551 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:42,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:42,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:42,553 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:42,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 12:06:42,754 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:42,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-11 12:06:42,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:42,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967787387] [2020-09-11 12:06:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:42,888 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 12:06:42,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967787387] [2020-09-11 12:06:42,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841085167] [2020-09-11 12:06:42,889 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 12:06:42,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:42,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:42,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:42,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:42,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:42,982 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 12:06:42,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:42,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:42,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143758848] [2020-09-11 12:06:42,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:42,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:42,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:42,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:42,984 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-11 12:06:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:43,219 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-11 12:06:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:43,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:43,225 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:43,225 INFO L226 Difference]: Without dead ends: 49 [2020-09-11 12:06:43,226 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 12:06:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-11 12:06:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-11 12:06:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 12:06:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 12:06:43,229 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-11 12:06:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:43,229 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 12:06:43,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 12:06:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:43,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:43,230 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:43,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 12:06:43,432 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-11 12:06:43,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:43,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115967499] [2020-09-11 12:06:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115967499] [2020-09-11 12:06:43,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527365028] [2020-09-11 12:06:43,537 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 12:06:43,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:43,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:43,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:43,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:43,613 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 12:06:43,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:43,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:43,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397879670] [2020-09-11 12:06:43,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:43,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:43,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:43,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:43,615 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-11 12:06:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:43,751 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-11 12:06:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:06:43,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:43,752 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:43,752 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:43,753 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 12:06:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 12:06:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 12:06:43,756 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-11 12:06:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:43,756 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 12:06:43,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 12:06:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:43,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:43,757 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:43,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 12:06:43,965 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:43,966 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-11 12:06:43,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:43,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237609548] [2020-09-11 12:06:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:44,067 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 12:06:44,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237609548] [2020-09-11 12:06:44,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261863490] [2020-09-11 12:06:44,069 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 12:06:44,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:44,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:44,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:44,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:44,157 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 12:06:44,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:44,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:44,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845686432] [2020-09-11 12:06:44,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:44,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:44,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:44,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:44,159 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-11 12:06:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:44,332 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-11 12:06:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:44,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:44,333 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:06:44,334 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:06:44,334 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 12:06:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:06:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-11 12:06:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 12:06:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 12:06:44,338 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-11 12:06:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:44,338 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 12:06:44,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 12:06:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:44,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:44,339 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:44,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 12:06:44,548 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-11 12:06:44,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:44,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131626312] [2020-09-11 12:06:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:44,646 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 12:06:44,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131626312] [2020-09-11 12:06:44,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609966542] [2020-09-11 12:06:44,647 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 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 12:06:44,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:44,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:44,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:44,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966660597] [2020-09-11 12:06:44,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:44,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:44,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:44,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:44,740 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-11 12:06:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:44,919 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-11 12:06:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:44,920 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:44,921 INFO L225 Difference]: With dead ends: 67 [2020-09-11 12:06:44,921 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:44,921 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 12:06:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-11 12:06:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-11 12:06:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-11 12:06:44,925 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-11 12:06:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:44,925 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-11 12:06:44,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-11 12:06:44,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:44,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:44,926 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:45,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:45,127 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-11 12:06:45,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:45,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628416656] [2020-09-11 12:06:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:45,244 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 12:06:45,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628416656] [2020-09-11 12:06:45,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796671838] [2020-09-11 12:06:45,245 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 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 12:06:45,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:45,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:45,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:45,347 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 12:06:45,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:45,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:45,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508482970] [2020-09-11 12:06:45,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:45,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:45,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:45,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:45,353 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-11 12:06:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:45,581 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-11 12:06:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:45,582 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:45,583 INFO L225 Difference]: With dead ends: 69 [2020-09-11 12:06:45,583 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 12:06:45,583 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 12:06:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 12:06:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 12:06:45,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:45,586 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-11 12:06:45,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:45,586 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:45,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:45,587 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:45,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:45,587 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:45,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:45,797 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:45,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-11 12:06:45,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:45,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645491033] [2020-09-11 12:06:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:45,870 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 12:06:45,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645491033] [2020-09-11 12:06:45,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817631488] [2020-09-11 12:06:45,870 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 12:06:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:45,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:45,952 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 12:06:45,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:45,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:45,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22714386] [2020-09-11 12:06:45,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:45,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:45,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:45,954 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-11 12:06:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:46,169 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 12:06:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:46,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:46,174 INFO L225 Difference]: With dead ends: 88 [2020-09-11 12:06:46,175 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 12:06:46,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 12:06:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-11 12:06:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-11 12:06:46,178 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-11 12:06:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:46,178 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-11 12:06:46,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-11 12:06:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:46,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:46,179 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:46,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:46,384 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:46,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-11 12:06:46,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:46,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791932264] [2020-09-11 12:06:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:46,463 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 12:06:46,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791932264] [2020-09-11 12:06:46,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086750356] [2020-09-11 12:06:46,464 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 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 12:06:46,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:46,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:46,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:46,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:46,542 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 12:06:46,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:46,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:46,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139202516] [2020-09-11 12:06:46,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:46,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:46,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:46,544 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-11 12:06:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:46,864 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 12:06:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:46,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:46,866 INFO L225 Difference]: With dead ends: 69 [2020-09-11 12:06:46,866 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:46,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:06:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-11 12:06:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 12:06:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-11 12:06:46,870 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-11 12:06:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:46,870 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-11 12:06:46,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-11 12:06:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:46,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:46,871 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:47,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 12:06:47,075 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:47,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:47,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-11 12:06:47,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:47,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952201171] [2020-09-11 12:06:47,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:47,172 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 12:06:47,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952201171] [2020-09-11 12:06:47,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484303235] [2020-09-11 12:06:47,173 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 12:06:47,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:47,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:47,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:47,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:47,248 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 12:06:47,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:47,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:47,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847278781] [2020-09-11 12:06:47,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:47,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:47,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:47,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:47,250 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-11 12:06:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:47,412 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 12:06:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:47,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:47,414 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:06:47,414 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:06:47,415 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 12:06:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:06:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-11 12:06:47,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:47,418 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 12:06:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:47,419 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:47,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:47,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:47,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:47,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 12:06:47,630 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:47,631 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-11 12:06:47,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:47,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793010733] [2020-09-11 12:06:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793010733] [2020-09-11 12:06:47,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370713546] [2020-09-11 12:06:47,736 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 12:06:47,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:47,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:47,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:47,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:47,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:47,827 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 12:06:47,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:47,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:47,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810516830] [2020-09-11 12:06:47,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:47,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:47,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:47,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:47,829 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 12:06:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:48,072 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-11 12:06:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:48,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:48,074 INFO L225 Difference]: With dead ends: 71 [2020-09-11 12:06:48,074 INFO L226 Difference]: Without dead ends: 65 [2020-09-11 12:06:48,074 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 12:06:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-11 12:06:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-11 12:06:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:48,077 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 12:06:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:48,077 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:48,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:48,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:48,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:48,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:48,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 12:06:48,282 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-11 12:06:48,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:48,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885735626] [2020-09-11 12:06:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:48,378 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 12:06:48,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885735626] [2020-09-11 12:06:48,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677714993] [2020-09-11 12:06:48,379 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 12:06:48,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:48,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:48,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:48,448 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 12:06:48,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:48,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:48,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680860038] [2020-09-11 12:06:48,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:48,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:48,450 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 12:06:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:48,683 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-11 12:06:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:48,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:48,688 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:06:48,688 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 12:06:48,689 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 12:06:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 12:06:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-11 12:06:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:48,692 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 12:06:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:48,692 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:48,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:48,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:48,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:48,693 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:48,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 12:06:48,894 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:48,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-11 12:06:48,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:48,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728627527] [2020-09-11 12:06:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:49,004 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 12:06:49,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728627527] [2020-09-11 12:06:49,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032514790] [2020-09-11 12:06:49,005 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 12:06:49,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:49,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:49,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:49,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:49,116 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 12:06:49,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:49,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:49,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556812075] [2020-09-11 12:06:49,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:49,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:49,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:49,118 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 12:06:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:49,440 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-11 12:06:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:49,441 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:49,442 INFO L225 Difference]: With dead ends: 67 [2020-09-11 12:06:49,442 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:49,443 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 12:06:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-11 12:06:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:49,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:49,445 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 12:06:49,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:49,445 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:49,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:49,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:49,446 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:49,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 12:06:49,654 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-11 12:06:49,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:49,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724741006] [2020-09-11 12:06:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724741006] [2020-09-11 12:06:49,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987303775] [2020-09-11 12:06:49,748 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 12:06:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:49,815 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 12:06:49,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:49,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:49,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167381718] [2020-09-11 12:06:49,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:49,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:49,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:49,818 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 12:06:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:50,040 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 12:06:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:50,041 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:50,043 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:06:50,043 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:06:50,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:06:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:06:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-11 12:06:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:06:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-11 12:06:50,046 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-11 12:06:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:50,047 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-11 12:06:50,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-11 12:06:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:50,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:50,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:50,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:50,255 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-11 12:06:50,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:50,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207308710] [2020-09-11 12:06:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:50,360 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 12:06:50,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207308710] [2020-09-11 12:06:50,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440105735] [2020-09-11 12:06:50,361 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 12:06:50,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:50,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:50,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:50,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:50,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422404405] [2020-09-11 12:06:50,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:50,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:50,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:50,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:50,454 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-11 12:06:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:50,853 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-09-11 12:06:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:50,854 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:50,855 INFO L225 Difference]: With dead ends: 64 [2020-09-11 12:06:50,855 INFO L226 Difference]: Without dead ends: 56 [2020-09-11 12:06:50,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-11 12:06:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-09-11 12:06:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-11 12:06:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-11 12:06:50,858 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-11 12:06:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:50,858 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-11 12:06:50,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-11 12:06:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:50,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:50,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:51,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 12:06:51,068 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-11 12:06:51,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:51,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325275005] [2020-09-11 12:06:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:51,146 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 12:06:51,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325275005] [2020-09-11 12:06:51,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403011032] [2020-09-11 12:06:51,147 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 12:06:51,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:51,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:51,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:51,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:51,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:51,238 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 12:06:51,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:51,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:51,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330886854] [2020-09-11 12:06:51,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:51,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:51,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:51,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:51,240 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-11 12:06:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:51,584 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-11 12:06:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:51,585 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:51,586 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:06:51,586 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 12:06:51,587 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 12:06:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 12:06:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-11 12:06:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 12:06:51,590 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-11 12:06:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:51,590 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 12:06:51,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 12:06:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:51,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:51,591 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:51,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 12:06:51,792 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-11 12:06:51,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:51,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102796948] [2020-09-11 12:06:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:51,894 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 12:06:51,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102796948] [2020-09-11 12:06:51,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709823870] [2020-09-11 12:06:51,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:06:51,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:51,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:51,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:51,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:51,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:51,990 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 12:06:51,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:51,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:51,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124561185] [2020-09-11 12:06:51,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:51,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:51,992 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-11 12:06:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:52,354 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-11 12:06:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:52,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:52,355 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:52,355 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:52,356 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 12:06:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-11 12:06:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 12:06:52,358 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-11 12:06:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:52,358 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 12:06:52,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 12:06:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:52,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:52,359 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:52,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:52,560 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-11 12:06:52,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:52,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907941869] [2020-09-11 12:06:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:52,667 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 12:06:52,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907941869] [2020-09-11 12:06:52,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259411456] [2020-09-11 12:06:52,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:06:52,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:06:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:52,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:52,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:52,733 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 12:06:52,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:52,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:52,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045237892] [2020-09-11 12:06:52,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:52,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:52,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:52,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:52,735 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-11 12:06:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:52,884 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-11 12:06:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:52,885 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:52,887 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:06:52,887 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:06:52,888 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 12:06:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:06:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 12:06:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 12:06:52,891 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-11 12:06:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:52,891 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 12:06:52,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:52,891 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 12:06:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:52,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:52,892 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:53,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:53,101 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:53,102 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-11 12:06:53,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:53,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122696185] [2020-09-11 12:06:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:53,262 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 12:06:53,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122696185] [2020-09-11 12:06:53,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393673824] [2020-09-11 12:06:53,263 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 12:06:53,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:06:53,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:53,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:53,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:53,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:53,417 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 12:06:53,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:53,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:53,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645249242] [2020-09-11 12:06:53,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:53,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:53,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:53,420 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-11 12:06:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:53,666 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-11 12:06:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:53,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:53,668 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:06:53,668 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:06:53,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:06:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 12:06:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 12:06:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-11 12:06:53,673 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-11 12:06:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:53,674 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-11 12:06:53,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:53,674 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-11 12:06:53,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:53,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:53,675 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:53,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 12:06:53,886 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:53,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-11 12:06:53,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:53,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085847450] [2020-09-11 12:06:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:53,992 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 12:06:53,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085847450] [2020-09-11 12:06:53,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409746447] [2020-09-11 12:06:53,993 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 12:06:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:54,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:54,065 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 12:06:54,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:54,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:54,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230988713] [2020-09-11 12:06:54,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:54,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:54,067 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-11 12:06:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:54,312 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-11 12:06:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:54,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:54,314 INFO L225 Difference]: With dead ends: 75 [2020-09-11 12:06:54,314 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 12:06:54,314 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 12:06:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 12:06:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-11 12:06:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:54,317 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-11 12:06:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:54,317 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:54,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:54,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:54,318 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:54,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:54,526 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:54,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:54,527 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-11 12:06:54,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:54,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814615880] [2020-09-11 12:06:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:54,652 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 12:06:54,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814615880] [2020-09-11 12:06:54,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220205239] [2020-09-11 12:06:54,652 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 12:06:54,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:54,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:54,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:54,747 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 12:06:54,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:54,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:54,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932514374] [2020-09-11 12:06:54,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:54,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:54,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:54,749 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-11 12:06:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:55,030 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-11 12:06:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:55,031 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:55,032 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:06:55,032 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:06:55,033 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 12:06:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:06:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-11 12:06:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:55,035 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-11 12:06:55,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:55,035 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:55,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:55,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:55,036 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:55,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 12:06:55,237 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:55,238 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-11 12:06:55,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:55,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182374964] [2020-09-11 12:06:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:55,379 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 12:06:55,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182374964] [2020-09-11 12:06:55,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107042424] [2020-09-11 12:06:55,380 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 12:06:55,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:06:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:55,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:55,494 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 12:06:55,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:55,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:55,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579867015] [2020-09-11 12:06:55,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:55,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:55,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:55,498 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-11 12:06:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:55,845 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-11 12:06:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:55,845 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:55,846 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:06:55,846 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:06:55,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:06:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-11 12:06:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 12:06:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-11 12:06:55,849 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-11 12:06:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:55,850 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-11 12:06:55,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-11 12:06:55,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:55,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:55,851 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:56,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:56,060 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-11 12:06:56,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:56,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838267575] [2020-09-11 12:06:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:56,154 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 12:06:56,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838267575] [2020-09-11 12:06:56,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809718483] [2020-09-11 12:06:56,155 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 12:06:56,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:56,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:56,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:56,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:56,231 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 12:06:56,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:56,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:56,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254410744] [2020-09-11 12:06:56,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:56,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:56,233 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-11 12:06:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:56,555 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-11 12:06:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:56,557 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:56,558 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:06:56,558 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 12:06:56,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 12:06:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-11 12:06:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 12:06:56,562 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-11 12:06:56,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:56,562 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 12:06:56,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:56,562 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 12:06:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:56,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:56,563 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:56,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 12:06:56,771 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:56,771 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-11 12:06:56,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:56,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512622784] [2020-09-11 12:06:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:56,857 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 12:06:56,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512622784] [2020-09-11 12:06:56,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653299804] [2020-09-11 12:06:56,858 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 12:06:56,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:06:56,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:56,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:56,937 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 12:06:56,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:56,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:56,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954026304] [2020-09-11 12:06:56,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:56,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:56,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:56,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:56,939 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-11 12:06:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:57,261 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-11 12:06:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:06:57,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:57,263 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:06:57,263 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:06:57,263 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 12:06:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:06:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-11 12:06:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:06:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-11 12:06:57,266 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-11 12:06:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:57,267 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-11 12:06:57,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-11 12:06:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:57,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:57,267 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:57,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 12:06:57,468 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:57,469 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-11 12:06:57,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:57,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306806368] [2020-09-11 12:06:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:57,557 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 12:06:57,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306806368] [2020-09-11 12:06:57,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214944201] [2020-09-11 12:06:57,558 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 12:06:57,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:06:57,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:57,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:57,676 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 12:06:57,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:57,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:57,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414571779] [2020-09-11 12:06:57,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:57,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:57,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:57,678 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-11 12:06:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:58,193 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-11 12:06:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:58,194 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:58,195 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:06:58,195 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 12:06:58,195 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 12:06:58,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 12:06:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 12:06:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:06:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-11 12:06:58,199 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-11 12:06:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:58,200 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-11 12:06:58,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-11 12:06:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:06:58,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:58,201 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:58,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 12:06:58,402 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:58,402 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-11 12:06:58,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:58,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645536225] [2020-09-11 12:06:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:58,539 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 12:06:58,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645536225] [2020-09-11 12:06:58,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516169016] [2020-09-11 12:06:58,540 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 12:06:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:58,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:06:58,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:58,615 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 12:06:58,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:58,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:06:58,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171791734] [2020-09-11 12:06:58,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:58,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:58,617 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-11 12:06:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:58,835 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 12:06:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:58,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:06:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:58,836 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:06:58,837 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:06:58,837 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 12:06:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:06:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-11 12:06:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:06:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:06:58,840 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:06:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:58,841 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:06:58,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:06:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:06:58,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:58,842 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:59,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 12:06:59,043 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:59,043 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-11 12:06:59,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:59,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988983332] [2020-09-11 12:06:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:59,183 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 12:06:59,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988983332] [2020-09-11 12:06:59,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910300677] [2020-09-11 12:06:59,184 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 12:06:59,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:59,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:59,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:06:59,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:59,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:59,268 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 12:06:59,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:59,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:06:59,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140576074] [2020-09-11 12:06:59,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:06:59,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:06:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:06:59,270 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:06:59,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:59,583 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 12:06:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:59,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:06:59,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:59,585 INFO L225 Difference]: With dead ends: 81 [2020-09-11 12:06:59,585 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 12:06:59,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 12:06:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-11 12:06:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:06:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:06:59,588 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:06:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:59,589 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:06:59,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:06:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:06:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:06:59,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:59,590 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:59,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 12:06:59,801 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:59,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-11 12:06:59,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:59,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087779654] [2020-09-11 12:06:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:59,910 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 12:06:59,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087779654] [2020-09-11 12:06:59,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215791995] [2020-09-11 12:06:59,911 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 12:06:59,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:06:59,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:59,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:06:59,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:59,986 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 12:06:59,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:59,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:06:59,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282505949] [2020-09-11 12:06:59,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:59,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:59,988 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:00,271 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 12:07:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:07:00,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:00,273 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:07:00,273 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:07:00,274 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 12:07:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:07:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-11 12:07:00,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:00,278 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:07:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:00,278 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:00,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:00,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:00,279 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:00,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 12:07:00,491 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-11 12:07:00,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:00,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641319682] [2020-09-11 12:07:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:00,654 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 12:07:00,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641319682] [2020-09-11 12:07:00,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692759522] [2020-09-11 12:07:00,655 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 12:07:00,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:00,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:00,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:00,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:00,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:00,768 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 12:07:00,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:00,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:00,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316771369] [2020-09-11 12:07:00,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:00,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:00,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:00,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:00,771 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:07:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:01,146 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 12:07:01,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:01,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:01,147 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:07:01,148 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:07:01,148 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 12:07:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:07:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-11 12:07:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:01,151 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:07:01,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:01,151 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:01,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:01,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:01,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:01,152 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:01,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 12:07:01,360 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-11 12:07:01,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:01,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217691828] [2020-09-11 12:07:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:01,464 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 12:07:01,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217691828] [2020-09-11 12:07:01,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363148445] [2020-09-11 12:07:01,465 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 12:07:01,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:07:01,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:01,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:01,534 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 12:07:01,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:01,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:01,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459030635] [2020-09-11 12:07:01,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:01,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:01,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:01,536 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:01,840 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-11 12:07:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:01,841 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:01,841 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:07:01,841 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:07:01,842 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 12:07:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:07:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-11 12:07:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:01,844 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:07:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:01,845 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:01,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:01,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:01,846 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:02,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:02,054 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-11 12:07:02,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:02,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488082817] [2020-09-11 12:07:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:02,161 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 12:07:02,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488082817] [2020-09-11 12:07:02,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977744271] [2020-09-11 12:07:02,162 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 12:07:02,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:07:02,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:02,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:02,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:02,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:02,265 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 12:07:02,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:02,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:02,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588515943] [2020-09-11 12:07:02,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:02,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:02,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:02,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:02,267 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:07:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:02,657 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-11 12:07:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:02,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:02,658 INFO L225 Difference]: With dead ends: 73 [2020-09-11 12:07:02,658 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 12:07:02,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 12:07:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-11 12:07:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:02,663 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:07:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:02,663 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:02,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:02,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:02,669 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:02,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 12:07:02,870 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:02,871 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-11 12:07:02,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:02,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017952386] [2020-09-11 12:07:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:02,969 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 12:07:02,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017952386] [2020-09-11 12:07:02,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113559228] [2020-09-11 12:07:02,970 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 12:07:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:03,039 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 12:07:03,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:03,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:03,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278635638] [2020-09-11 12:07:03,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:03,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:03,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:03,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:03,041 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:03,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:03,439 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 12:07:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:03,452 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:03,453 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:03,453 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:03,454 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 12:07:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 12:07:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 12:07:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-11 12:07:03,457 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-11 12:07:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:03,457 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-11 12:07:03,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-11 12:07:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:03,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:03,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:03,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:03,661 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-11 12:07:03,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:03,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477186782] [2020-09-11 12:07:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:03,759 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 12:07:03,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477186782] [2020-09-11 12:07:03,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463888321] [2020-09-11 12:07:03,760 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 12:07:03,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:03,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:03,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:03,860 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 12:07:03,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:03,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:03,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13028215] [2020-09-11 12:07:03,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:03,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:03,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:03,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:03,862 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-11 12:07:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:04,349 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-11 12:07:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:04,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:04,351 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:07:04,351 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:07:04,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:07:04,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-11 12:07:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 12:07:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-11 12:07:04,358 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-11 12:07:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:04,358 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-11 12:07:04,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-11 12:07:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:04,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:04,359 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:04,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 12:07:04,569 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:04,570 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-11 12:07:04,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:04,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138003982] [2020-09-11 12:07:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:04,676 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 12:07:04,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138003982] [2020-09-11 12:07:04,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18451036] [2020-09-11 12:07:04,677 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 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 12:07:04,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:07:04,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:04,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:04,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:04,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:04,791 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 12:07:04,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:04,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:04,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911370484] [2020-09-11 12:07:04,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:04,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:04,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:04,793 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-11 12:07:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:05,268 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-11 12:07:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:05,268 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:05,269 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:07:05,270 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:07:05,270 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 12:07:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:07:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-11 12:07:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 12:07:05,273 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-11 12:07:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:05,273 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 12:07:05,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 12:07:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:05,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:05,274 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:05,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:05,482 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:05,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-11 12:07:05,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:05,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026606161] [2020-09-11 12:07:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:05,606 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 12:07:05,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026606161] [2020-09-11 12:07:05,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016723626] [2020-09-11 12:07:05,607 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 12:07:05,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:05,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:05,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:05,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:05,721 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 12:07:05,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:05,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:05,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566521356] [2020-09-11 12:07:05,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:05,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:05,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:05,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:05,723 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-11 12:07:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:06,243 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-11 12:07:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:06,243 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:06,245 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:07:06,245 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:07:06,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:07:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-11 12:07:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:07:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 12:07:06,247 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-11 12:07:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:06,247 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 12:07:06,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 12:07:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:06,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:06,248 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:06,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 12:07:06,456 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:06,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-11 12:07:06,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:06,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647523227] [2020-09-11 12:07:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:06,611 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 12:07:06,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647523227] [2020-09-11 12:07:06,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891546671] [2020-09-11 12:07:06,612 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 12:07:06,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:06,680 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 12:07:06,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:06,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:06,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180708633] [2020-09-11 12:07:06,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:06,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:06,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:06,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:06,682 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-11 12:07:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:06,899 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-11 12:07:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:07:06,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:06,901 INFO L225 Difference]: With dead ends: 72 [2020-09-11 12:07:06,901 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 12:07:06,901 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 12:07:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 12:07:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 12:07:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-11 12:07:06,905 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-11 12:07:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:06,905 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-11 12:07:06,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-11 12:07:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:06,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:06,906 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:07,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 12:07:07,114 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-11 12:07:07,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:07,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640043589] [2020-09-11 12:07:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:07,250 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 12:07:07,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640043589] [2020-09-11 12:07:07,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700314405] [2020-09-11 12:07:07,250 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 12:07:07,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:07,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:07,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:07,356 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 12:07:07,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:07,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:07,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75055068] [2020-09-11 12:07:07,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:07,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:07,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:07,358 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-11 12:07:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:07,613 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-11 12:07:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:07:07,613 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:07,614 INFO L225 Difference]: With dead ends: 82 [2020-09-11 12:07:07,614 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 12:07:07,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:07:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 12:07:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 12:07:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:07:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-11 12:07:07,617 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-11 12:07:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:07,617 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-11 12:07:07,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-11 12:07:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:07,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:07,618 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:07,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 12:07:07,826 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-11 12:07:07,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:07,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831155131] [2020-09-11 12:07:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:07,970 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 12:07:07,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831155131] [2020-09-11 12:07:07,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592788480] [2020-09-11 12:07:07,970 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 12:07:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:08,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:08,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:08,061 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 12:07:08,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:08,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:08,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000096763] [2020-09-11 12:07:08,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:08,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:08,063 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-11 12:07:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:08,351 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-11 12:07:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:08,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:08,353 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:07:08,353 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:08,354 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 12:07:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-11 12:07:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:07:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-11 12:07:08,356 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-11 12:07:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:08,356 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-11 12:07:08,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-11 12:07:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:08,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:08,357 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:08,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 12:07:08,563 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:08,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-11 12:07:08,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:08,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88230565] [2020-09-11 12:07:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:08,715 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 12:07:08,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88230565] [2020-09-11 12:07:08,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942695688] [2020-09-11 12:07:08,716 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 12:07:08,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:08,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:08,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:08,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:08,814 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 12:07:08,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:08,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:08,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062175760] [2020-09-11 12:07:08,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:08,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:08,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:08,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:08,816 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-11 12:07:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:09,189 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-11 12:07:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:09,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:09,194 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:09,194 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:09,194 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 12:07:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-11 12:07:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-11 12:07:09,197 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-11 12:07:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:09,197 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-11 12:07:09,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-11 12:07:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:09,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:09,198 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:09,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:09,406 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:09,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-11 12:07:09,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:09,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780972735] [2020-09-11 12:07:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:09,545 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 12:07:09,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780972735] [2020-09-11 12:07:09,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017200788] [2020-09-11 12:07:09,546 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 12:07:09,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:09,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:09,625 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 12:07:09,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:09,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:09,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838031123] [2020-09-11 12:07:09,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:09,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:09,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:09,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:09,626 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-11 12:07:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:09,988 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-11 12:07:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:09,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:09,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:09,989 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:09,990 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:09,990 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 12:07:09,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-11 12:07:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:09,993 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-11 12:07:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:09,993 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:09,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:09,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:09,994 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:10,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:10,202 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:10,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-11 12:07:10,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:10,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241287829] [2020-09-11 12:07:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:10,334 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 12:07:10,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241287829] [2020-09-11 12:07:10,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516910175] [2020-09-11 12:07:10,335 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 12:07:10,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:10,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:10,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:10,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:10,423 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 12:07:10,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:10,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:10,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135962005] [2020-09-11 12:07:10,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:10,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:10,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:10,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:10,425 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-11 12:07:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:10,891 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-11 12:07:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:10,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:10,892 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:07:10,893 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:07:10,893 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 12:07:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:07:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-11 12:07:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:10,895 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-11 12:07:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:10,896 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:10,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:10,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:10,896 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:11,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 12:07:11,105 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:11,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-11 12:07:11,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:11,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907134545] [2020-09-11 12:07:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:11,233 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 12:07:11,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907134545] [2020-09-11 12:07:11,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295161124] [2020-09-11 12:07:11,234 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 12:07:11,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:11,305 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 12:07:11,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:11,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:11,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164007795] [2020-09-11 12:07:11,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:11,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:11,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:11,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:11,307 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-11 12:07:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:11,715 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-11 12:07:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:11,716 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:11,717 INFO L225 Difference]: With dead ends: 87 [2020-09-11 12:07:11,717 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:07:11,717 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 12:07:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:07:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-11 12:07:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 12:07:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-11 12:07:11,720 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-11 12:07:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:11,721 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-11 12:07:11,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-11 12:07:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:11,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:11,721 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:11,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:11,929 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:11,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-11 12:07:11,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:11,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260372298] [2020-09-11 12:07:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:12,041 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 12:07:12,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260372298] [2020-09-11 12:07:12,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082625756] [2020-09-11 12:07:12,042 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 12:07:12,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:12,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:12,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:12,135 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 12:07:12,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:12,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:12,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862875680] [2020-09-11 12:07:12,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:12,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:12,137 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-11 12:07:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:12,678 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-11 12:07:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:12,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:12,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:12,679 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:12,680 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:12,680 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 12:07:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-11 12:07:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 12:07:12,684 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-11 12:07:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:12,684 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 12:07:12,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 12:07:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:12,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:12,685 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:12,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 12:07:12,895 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:12,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-11 12:07:12,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:12,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525328021] [2020-09-11 12:07:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:13,012 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 12:07:13,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525328021] [2020-09-11 12:07:13,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299629076] [2020-09-11 12:07:13,012 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 12:07:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:13,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:13,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:13,088 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 12:07:13,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:13,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:13,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944862731] [2020-09-11 12:07:13,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:13,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:13,091 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-11 12:07:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:13,548 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 12:07:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:13,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:13,549 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:07:13,549 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:07:13,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:07:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:07:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-11 12:07:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:07:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-11 12:07:13,552 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-11 12:07:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:13,553 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-11 12:07:13,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-11 12:07:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:13,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:13,553 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:13,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 12:07:13,755 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:13,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-11 12:07:13,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:13,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931138204] [2020-09-11 12:07:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:13,873 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 12:07:13,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931138204] [2020-09-11 12:07:13,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121725352] [2020-09-11 12:07:13,874 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 12:07:13,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:13,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:13,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:13,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:13,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:13,959 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 12:07:13,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:13,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:13,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185692366] [2020-09-11 12:07:13,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:13,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:13,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:13,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:13,961 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-11 12:07:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:14,537 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-11 12:07:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:14,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:14,538 INFO L225 Difference]: With dead ends: 85 [2020-09-11 12:07:14,539 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:14,539 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 12:07:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-11 12:07:14,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 12:07:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-11 12:07:14,542 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-11 12:07:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:14,542 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-11 12:07:14,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-11 12:07:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:14,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:14,543 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:14,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 12:07:14,751 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-11 12:07:14,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:14,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802016145] [2020-09-11 12:07:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-11 12:07:14,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-11 12:07:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-11 12:07:14,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-11 12:07:14,801 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-11 12:07:14,802 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-11 12:07:14,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-11 12:07:14,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 12:07:14 BasicIcfg [2020-09-11 12:07:14,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 12:07:14,872 INFO L168 Benchmark]: Toolchain (without parser) took 42266.06 ms. Allocated memory was 140.0 MB in the beginning and 460.8 MB in the end (delta: 320.9 MB). Free memory was 101.6 MB in the beginning and 148.3 MB in the end (delta: -46.7 MB). Peak memory consumption was 274.2 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:14,873 INFO L168 Benchmark]: CDTParser took 1.48 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 12:07:14,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 799.89 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 101.0 MB in the beginning and 162.3 MB in the end (delta: -61.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:14,874 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.74 ms. Allocated memory is still 202.4 MB. Free memory was 162.3 MB in the beginning and 160.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:14,874 INFO L168 Benchmark]: Boogie Preprocessor took 34.46 ms. Allocated memory is still 202.4 MB. Free memory was 160.3 MB in the beginning and 159.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:14,875 INFO L168 Benchmark]: RCFGBuilder took 495.01 ms. Allocated memory is still 202.4 MB. Free memory was 159.0 MB in the beginning and 139.0 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:14,875 INFO L168 Benchmark]: TraceAbstraction took 40866.90 ms. Allocated memory was 202.4 MB in the beginning and 460.8 MB in the end (delta: 258.5 MB). Free memory was 138.3 MB in the beginning and 148.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 248.5 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:14,877 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.48 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 799.89 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 101.0 MB in the beginning and 162.3 MB in the end (delta: -61.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 59.74 ms. Allocated memory is still 202.4 MB. Free memory was 162.3 MB in the beginning and 160.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.46 ms. Allocated memory is still 202.4 MB. Free memory was 160.3 MB in the beginning and 159.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 495.01 ms. Allocated memory is still 202.4 MB. Free memory was 159.0 MB in the beginning and 139.0 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 40866.90 ms. Allocated memory was 202.4 MB in the beginning and 460.8 MB in the end (delta: 258.5 MB). Free memory was 138.3 MB in the beginning and 148.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 248.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 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, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 40.6s, OverallIterations: 59, TraceHistogramMax: 5, AutomataDifference: 16.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 901 SDtfs, 2428 SDslu, 3534 SDs, 0 SdLazy, 3810 SolverSat, 1596 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1778 GetRequests, 634 SyntacticMatches, 53 SemanticMatches, 1091 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 14.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 58 MinimizatonAttempts, 952 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 1602 NumberOfCodeBlocks, 1602 NumberOfCodeBlocksAsserted, 196 NumberOfCheckSat, 1473 ConstructedInterpolants, 0 QuantifiedInterpolants, 86797 SizeOfPredicates, 346 NumberOfNonLiveVariables, 5122 ConjunctsInSsa, 560 ConjunctsInUnsatCore, 111 InterpolantComputations, 5 PerfectInterpolantSequences, 0/900 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 proved your program to be incorrect! Received shutdown request...