/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 03:13:20,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 03:13:20,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 03:13:20,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 03:13:20,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 03:13:20,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 03:13:20,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 03:13:20,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 03:13:20,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 03:13:20,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 03:13:20,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 03:13:20,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 03:13:20,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 03:13:20,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 03:13:20,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 03:13:20,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 03:13:20,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 03:13:20,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 03:13:21,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 03:13:21,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 03:13:21,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 03:13:21,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 03:13:21,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 03:13:21,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 03:13:21,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 03:13:21,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 03:13:21,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 03:13:21,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 03:13:21,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 03:13:21,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 03:13:21,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 03:13:21,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 03:13:21,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 03:13:21,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 03:13:21,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 03:13:21,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 03:13:21,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 03:13:21,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 03:13:21,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 03:13:21,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 03:13:21,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 03:13:21,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-04-18 03:13:21,070 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 03:13:21,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 03:13:21,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 03:13:21,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 03:13:21,072 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 03:13:21,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 03:13:21,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 03:13:21,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 03:13:21,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 03:13:21,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 03:13:21,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 03:13:21,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 03:13:21,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 03:13:21,074 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 03:13:21,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 03:13:21,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 03:13:21,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 03:13:21,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 03:13:21,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 03:13:21,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 03:13:21,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 03:13:21,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 03:13:21,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 03:13:21,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 03:13:21,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 03:13:21,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-18 03:13:21,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 03:13:21,077 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-04-18 03:13:21,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 03:13:21,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 03:13:21,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 03:13:21,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 03:13:21,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 03:13:21,404 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 03:13:21,405 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 03:13:21,406 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-18 03:13:21,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a39879ec/43b91a8ba2364ea8b555b49b23f3bff4/FLAG23f96ae1c [2020-04-18 03:13:22,036 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 03:13:22,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-18 03:13:22,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a39879ec/43b91a8ba2364ea8b555b49b23f3bff4/FLAG23f96ae1c [2020-04-18 03:13:22,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a39879ec/43b91a8ba2364ea8b555b49b23f3bff4 [2020-04-18 03:13:22,317 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 03:13:22,339 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 03:13:22,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:22,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 03:13:22,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 03:13:22,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70038069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:22, skipping insertion in model container [2020-04-18 03:13:22,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 03:13:22,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 03:13:22,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:22,892 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 03:13:22,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:23,043 INFO L208 MainTranslator]: Completed translation [2020-04-18 03:13:23,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23 WrapperNode [2020-04-18 03:13:23,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:23,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 03:13:23,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 03:13:23,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 03:13:23,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 03:13:23,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 03:13:23,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 03:13:23,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 03:13:23,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 03:13:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 03:13:23,228 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 03:13:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 03:13:23,228 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 03:13:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 03:13:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 03:13:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 03:13:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 03:13:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 03:13:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 03:13:23,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 03:13:23,231 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 03:13:23,593 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 03:13:23,594 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 03:13:23,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:13:23 BoogieIcfgContainer [2020-04-18 03:13:23,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 03:13:23,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 03:13:23,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 03:13:23,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 03:13:23,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:13:22" (1/3) ... [2020-04-18 03:13:23,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313139c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:13:23, skipping insertion in model container [2020-04-18 03:13:23,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (2/3) ... [2020-04-18 03:13:23,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313139c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:13:23, skipping insertion in model container [2020-04-18 03:13:23,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:13:23" (3/3) ... [2020-04-18 03:13:23,606 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-04-18 03:13:23,614 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 03:13:23,615 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 03:13:23,622 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 03:13:23,623 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 03:13:23,647 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,647 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,651 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,651 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,652 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,652 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,654 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,654 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,654 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,655 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,655 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,655 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,655 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,656 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,656 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,657 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,657 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,657 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,657 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,658 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,658 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,658 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,658 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,659 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,659 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,659 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,659 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,659 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,660 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,660 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,663 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,664 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,664 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,664 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,665 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,665 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,670 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,671 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,671 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,671 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,671 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,672 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,686 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 03:13:23,707 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 03:13:23,707 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 03:13:23,708 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 03:13:23,708 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 03:13:23,708 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 03:13:23,708 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 03:13:23,708 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 03:13:23,708 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 03:13:23,720 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 03:13:23,823 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1741 states. [2020-04-18 03:13:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states. [2020-04-18 03:13:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 03:13:23,841 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:23,842 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:23,843 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash 627590565, now seen corresponding path program 1 times [2020-04-18 03:13:23,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:23,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386355123] [2020-04-18 03:13:23,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:24,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386355123] [2020-04-18 03:13:24,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:24,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 03:13:24,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866719114] [2020-04-18 03:13:24,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 03:13:24,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:24,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 03:13:24,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 03:13:24,309 INFO L87 Difference]: Start difference. First operand 1741 states. Second operand 6 states. [2020-04-18 03:13:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:24,674 INFO L93 Difference]: Finished difference Result 3726 states and 10822 transitions. [2020-04-18 03:13:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-18 03:13:24,676 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-04-18 03:13:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:24,703 INFO L225 Difference]: With dead ends: 3726 [2020-04-18 03:13:24,703 INFO L226 Difference]: Without dead ends: 1164 [2020-04-18 03:13:24,705 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-04-18 03:13:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2020-04-18 03:13:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 899. [2020-04-18 03:13:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-04-18 03:13:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2439 transitions. [2020-04-18 03:13:24,885 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2439 transitions. Word has length 22 [2020-04-18 03:13:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:24,886 INFO L479 AbstractCegarLoop]: Abstraction has 899 states and 2439 transitions. [2020-04-18 03:13:24,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 03:13:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2439 transitions. [2020-04-18 03:13:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 03:13:24,897 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:24,897 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:24,898 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:24,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1828680335, now seen corresponding path program 1 times [2020-04-18 03:13:24,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:24,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435380769] [2020-04-18 03:13:24,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:25,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435380769] [2020-04-18 03:13:25,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:13:25,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998447706] [2020-04-18 03:13:25,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:13:25,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:13:25,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:13:25,168 INFO L87 Difference]: Start difference. First operand 899 states and 2439 transitions. Second operand 7 states. [2020-04-18 03:13:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:25,447 INFO L93 Difference]: Finished difference Result 2140 states and 5665 transitions. [2020-04-18 03:13:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 03:13:25,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-04-18 03:13:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:25,460 INFO L225 Difference]: With dead ends: 2140 [2020-04-18 03:13:25,460 INFO L226 Difference]: Without dead ends: 1664 [2020-04-18 03:13:25,461 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2020-04-18 03:13:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1195. [2020-04-18 03:13:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2020-04-18 03:13:25,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3244 transitions. [2020-04-18 03:13:25,511 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3244 transitions. Word has length 27 [2020-04-18 03:13:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:25,512 INFO L479 AbstractCegarLoop]: Abstraction has 1195 states and 3244 transitions. [2020-04-18 03:13:25,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:13:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3244 transitions. [2020-04-18 03:13:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:25,516 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:25,516 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:25,516 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash 637689491, now seen corresponding path program 1 times [2020-04-18 03:13:25,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:25,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94524810] [2020-04-18 03:13:25,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:25,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94524810] [2020-04-18 03:13:25,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-04-18 03:13:25,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974351347] [2020-04-18 03:13:25,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 03:13:25,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 03:13:25,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-04-18 03:13:25,723 INFO L87 Difference]: Start difference. First operand 1195 states and 3244 transitions. Second operand 8 states. [2020-04-18 03:13:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:26,136 INFO L93 Difference]: Finished difference Result 2622 states and 6914 transitions. [2020-04-18 03:13:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-18 03:13:26,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-04-18 03:13:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:26,154 INFO L225 Difference]: With dead ends: 2622 [2020-04-18 03:13:26,155 INFO L226 Difference]: Without dead ends: 2146 [2020-04-18 03:13:26,155 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:13:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2020-04-18 03:13:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1485. [2020-04-18 03:13:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1485 states. [2020-04-18 03:13:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4004 transitions. [2020-04-18 03:13:26,227 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4004 transitions. Word has length 32 [2020-04-18 03:13:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:26,228 INFO L479 AbstractCegarLoop]: Abstraction has 1485 states and 4004 transitions. [2020-04-18 03:13:26,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 03:13:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4004 transitions. [2020-04-18 03:13:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:26,232 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:26,233 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:26,233 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1255519260, now seen corresponding path program 1 times [2020-04-18 03:13:26,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:26,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746252251] [2020-04-18 03:13:26,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:26,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746252251] [2020-04-18 03:13:26,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178395777] [2020-04-18 03:13:26,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:26,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:26,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:26,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:26,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:26,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:26,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042963820] [2020-04-18 03:13:26,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:26,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:26,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:26,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:26,745 INFO L87 Difference]: Start difference. First operand 1485 states and 4004 transitions. Second operand 14 states. [2020-04-18 03:13:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:27,778 INFO L93 Difference]: Finished difference Result 4438 states and 11566 transitions. [2020-04-18 03:13:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:13:27,779 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:27,804 INFO L225 Difference]: With dead ends: 4438 [2020-04-18 03:13:27,805 INFO L226 Difference]: Without dead ends: 3398 [2020-04-18 03:13:27,806 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:13:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2020-04-18 03:13:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 2101. [2020-04-18 03:13:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2101 states. [2020-04-18 03:13:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5623 transitions. [2020-04-18 03:13:27,910 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5623 transitions. Word has length 37 [2020-04-18 03:13:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:27,911 INFO L479 AbstractCegarLoop]: Abstraction has 2101 states and 5623 transitions. [2020-04-18 03:13:27,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5623 transitions. [2020-04-18 03:13:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:27,919 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:27,919 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:28,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:28,123 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash -520422237, now seen corresponding path program 1 times [2020-04-18 03:13:28,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:28,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782774512] [2020-04-18 03:13:28,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:28,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782774512] [2020-04-18 03:13:28,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662800662] [2020-04-18 03:13:28,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:28,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:28,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:28,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:28,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:28,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:28,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882866949] [2020-04-18 03:13:28,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:28,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:28,603 INFO L87 Difference]: Start difference. First operand 2101 states and 5623 transitions. Second operand 16 states. [2020-04-18 03:13:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:29,922 INFO L93 Difference]: Finished difference Result 4706 states and 12208 transitions. [2020-04-18 03:13:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-18 03:13:29,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:29,948 INFO L225 Difference]: With dead ends: 4706 [2020-04-18 03:13:29,948 INFO L226 Difference]: Without dead ends: 4118 [2020-04-18 03:13:29,949 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:13:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2020-04-18 03:13:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2314. [2020-04-18 03:13:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-04-18 03:13:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 6210 transitions. [2020-04-18 03:13:30,042 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 6210 transitions. Word has length 42 [2020-04-18 03:13:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:30,043 INFO L479 AbstractCegarLoop]: Abstraction has 2314 states and 6210 transitions. [2020-04-18 03:13:30,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 6210 transitions. [2020-04-18 03:13:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:30,048 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:30,048 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:30,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:30,259 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1256086345, now seen corresponding path program 2 times [2020-04-18 03:13:30,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:30,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505049599] [2020-04-18 03:13:30,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:30,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505049599] [2020-04-18 03:13:30,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511816938] [2020-04-18 03:13:30,427 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:30,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:30,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:30,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:30,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:30,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:30,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:30,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:30,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:30,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179086536] [2020-04-18 03:13:30,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:30,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:30,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:30,736 INFO L87 Difference]: Start difference. First operand 2314 states and 6210 transitions. Second operand 16 states. [2020-04-18 03:13:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:31,815 INFO L93 Difference]: Finished difference Result 5714 states and 14843 transitions. [2020-04-18 03:13:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-18 03:13:31,815 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:31,844 INFO L225 Difference]: With dead ends: 5714 [2020-04-18 03:13:31,844 INFO L226 Difference]: Without dead ends: 4916 [2020-04-18 03:13:31,845 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=478, Invalid=2072, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 03:13:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2020-04-18 03:13:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 2482. [2020-04-18 03:13:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2020-04-18 03:13:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 6650 transitions. [2020-04-18 03:13:31,985 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 6650 transitions. Word has length 42 [2020-04-18 03:13:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:31,986 INFO L479 AbstractCegarLoop]: Abstraction has 2482 states and 6650 transitions. [2020-04-18 03:13:31,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 6650 transitions. [2020-04-18 03:13:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:31,993 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:31,993 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:32,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:32,205 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash 490795132, now seen corresponding path program 3 times [2020-04-18 03:13:32,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:32,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291803843] [2020-04-18 03:13:32,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:32,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291803843] [2020-04-18 03:13:32,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675648812] [2020-04-18 03:13:32,470 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:32,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 03:13:32,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:32,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:32,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:32,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:32,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:32,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:32,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:32,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665829885] [2020-04-18 03:13:32,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:32,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:32,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:32,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:13:32,747 INFO L87 Difference]: Start difference. First operand 2482 states and 6650 transitions. Second operand 18 states. [2020-04-18 03:13:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:34,201 INFO L93 Difference]: Finished difference Result 5900 states and 15261 transitions. [2020-04-18 03:13:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-04-18 03:13:34,207 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:13:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:34,238 INFO L225 Difference]: With dead ends: 5900 [2020-04-18 03:13:34,238 INFO L226 Difference]: Without dead ends: 5312 [2020-04-18 03:13:34,239 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=563, Invalid=2517, Unknown=0, NotChecked=0, Total=3080 [2020-04-18 03:13:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2020-04-18 03:13:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 2677. [2020-04-18 03:13:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2677 states. [2020-04-18 03:13:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 7198 transitions. [2020-04-18 03:13:34,331 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 7198 transitions. Word has length 47 [2020-04-18 03:13:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:34,331 INFO L479 AbstractCegarLoop]: Abstraction has 2677 states and 7198 transitions. [2020-04-18 03:13:34,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:13:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 7198 transitions. [2020-04-18 03:13:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:34,338 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:34,338 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:34,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:34,550 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash -29094556, now seen corresponding path program 4 times [2020-04-18 03:13:34,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:34,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077931267] [2020-04-18 03:13:34,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:34,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077931267] [2020-04-18 03:13:34,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033328787] [2020-04-18 03:13:34,960 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:35,021 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:13:35,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:35,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:35,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:35,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:35,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:35,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:35,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:35,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056130559] [2020-04-18 03:13:35,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:35,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:35,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:13:35,186 INFO L87 Difference]: Start difference. First operand 2677 states and 7198 transitions. Second operand 18 states. [2020-04-18 03:13:36,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:36,607 INFO L93 Difference]: Finished difference Result 6893 states and 17915 transitions. [2020-04-18 03:13:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-04-18 03:13:36,608 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:13:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:36,626 INFO L225 Difference]: With dead ends: 6893 [2020-04-18 03:13:36,626 INFO L226 Difference]: Without dead ends: 6095 [2020-04-18 03:13:36,628 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=688, Invalid=3094, Unknown=0, NotChecked=0, Total=3782 [2020-04-18 03:13:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2020-04-18 03:13:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 2998. [2020-04-18 03:13:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2998 states. [2020-04-18 03:13:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 8098 transitions. [2020-04-18 03:13:36,734 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 8098 transitions. Word has length 47 [2020-04-18 03:13:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:36,735 INFO L479 AbstractCegarLoop]: Abstraction has 2998 states and 8098 transitions. [2020-04-18 03:13:36,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:13:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 8098 transitions. [2020-04-18 03:13:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:36,742 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:36,742 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:36,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:36,946 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:36,946 INFO L82 PathProgramCache]: Analyzing trace with hash -864451660, now seen corresponding path program 5 times [2020-04-18 03:13:36,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:36,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013599508] [2020-04-18 03:13:36,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:37,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013599508] [2020-04-18 03:13:37,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546311384] [2020-04-18 03:13:37,189 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:37,246 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 03:13:37,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:37,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:37,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:37,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:37,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:37,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:37,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:37,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709367825] [2020-04-18 03:13:37,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:37,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:37,394 INFO L87 Difference]: Start difference. First operand 2998 states and 8098 transitions. Second operand 17 states. [2020-04-18 03:13:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:38,452 INFO L93 Difference]: Finished difference Result 5958 states and 15710 transitions. [2020-04-18 03:13:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:13:38,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:38,465 INFO L225 Difference]: With dead ends: 5958 [2020-04-18 03:13:38,466 INFO L226 Difference]: Without dead ends: 5594 [2020-04-18 03:13:38,467 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:13:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2020-04-18 03:13:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 3132. [2020-04-18 03:13:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3132 states. [2020-04-18 03:13:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 8604 transitions. [2020-04-18 03:13:38,564 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 8604 transitions. Word has length 47 [2020-04-18 03:13:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:38,564 INFO L479 AbstractCegarLoop]: Abstraction has 3132 states and 8604 transitions. [2020-04-18 03:13:38,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 8604 transitions. [2020-04-18 03:13:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:38,571 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:38,571 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:38,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:38,775 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:38,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1080226080, now seen corresponding path program 6 times [2020-04-18 03:13:38,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:38,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569175510] [2020-04-18 03:13:38,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:38,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569175510] [2020-04-18 03:13:38,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843465348] [2020-04-18 03:13:38,973 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:39,051 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 03:13:39,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:39,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:39,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:39,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:39,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:39,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:39,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:39,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765517744] [2020-04-18 03:13:39,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:39,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:39,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:39,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:39,248 INFO L87 Difference]: Start difference. First operand 3132 states and 8604 transitions. Second operand 17 states. [2020-04-18 03:13:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:40,825 INFO L93 Difference]: Finished difference Result 6341 states and 16827 transitions. [2020-04-18 03:13:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:13:40,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:40,836 INFO L225 Difference]: With dead ends: 6341 [2020-04-18 03:13:40,837 INFO L226 Difference]: Without dead ends: 5977 [2020-04-18 03:13:40,838 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=443, Invalid=1908, Unknown=1, NotChecked=0, Total=2352 [2020-04-18 03:13:40,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2020-04-18 03:13:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 3062. [2020-04-18 03:13:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3062 states. [2020-04-18 03:13:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 8360 transitions. [2020-04-18 03:13:40,937 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 8360 transitions. Word has length 47 [2020-04-18 03:13:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:40,938 INFO L479 AbstractCegarLoop]: Abstraction has 3062 states and 8360 transitions. [2020-04-18 03:13:40,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 8360 transitions. [2020-04-18 03:13:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:40,944 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:40,944 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:41,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:41,158 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1639823560, now seen corresponding path program 7 times [2020-04-18 03:13:41,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:41,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618521449] [2020-04-18 03:13:41,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:41,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618521449] [2020-04-18 03:13:41,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410072810] [2020-04-18 03:13:41,320 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:41,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:41,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:41,520 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:41,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:41,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:41,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:41,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838192220] [2020-04-18 03:13:41,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:41,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:13:41,573 INFO L87 Difference]: Start difference. First operand 3062 states and 8360 transitions. Second operand 18 states. [2020-04-18 03:13:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:43,457 INFO L93 Difference]: Finished difference Result 7238 states and 18735 transitions. [2020-04-18 03:13:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-04-18 03:13:43,457 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:13:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:43,467 INFO L225 Difference]: With dead ends: 7238 [2020-04-18 03:13:43,467 INFO L226 Difference]: Without dead ends: 6440 [2020-04-18 03:13:43,468 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=737, Invalid=3553, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 03:13:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6440 states. [2020-04-18 03:13:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6440 to 3342. [2020-04-18 03:13:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3342 states. [2020-04-18 03:13:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 9197 transitions. [2020-04-18 03:13:43,567 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 9197 transitions. Word has length 47 [2020-04-18 03:13:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:43,568 INFO L479 AbstractCegarLoop]: Abstraction has 3342 states and 9197 transitions. [2020-04-18 03:13:43,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:13:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 9197 transitions. [2020-04-18 03:13:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:13:43,575 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:43,575 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:43,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:43,779 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:43,779 INFO L82 PathProgramCache]: Analyzing trace with hash -536445885, now seen corresponding path program 8 times [2020-04-18 03:13:43,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:43,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611823665] [2020-04-18 03:13:43,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:43,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611823665] [2020-04-18 03:13:43,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050876378] [2020-04-18 03:13:43,962 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:44,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:44,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:44,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:13:44,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:44,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:44,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:44,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:44,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-04-18 03:13:44,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462920109] [2020-04-18 03:13:44,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 03:13:44,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:44,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 03:13:44,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:13:44,189 INFO L87 Difference]: Start difference. First operand 3342 states and 9197 transitions. Second operand 19 states. [2020-04-18 03:13:45,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:45,418 INFO L93 Difference]: Finished difference Result 6879 states and 18248 transitions. [2020-04-18 03:13:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-18 03:13:45,419 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-04-18 03:13:45,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:45,429 INFO L225 Difference]: With dead ends: 6879 [2020-04-18 03:13:45,429 INFO L226 Difference]: Without dead ends: 6467 [2020-04-18 03:13:45,431 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=564, Invalid=2406, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 03:13:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6467 states. [2020-04-18 03:13:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6467 to 3667. [2020-04-18 03:13:45,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3667 states. [2020-04-18 03:13:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 10181 transitions. [2020-04-18 03:13:45,534 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 10181 transitions. Word has length 52 [2020-04-18 03:13:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:45,534 INFO L479 AbstractCegarLoop]: Abstraction has 3667 states and 10181 transitions. [2020-04-18 03:13:45,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 03:13:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 10181 transitions. [2020-04-18 03:13:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:13:45,548 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:45,548 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:45,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:45,752 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1056335573, now seen corresponding path program 9 times [2020-04-18 03:13:45,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:45,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810898265] [2020-04-18 03:13:45,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:46,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810898265] [2020-04-18 03:13:46,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165306823] [2020-04-18 03:13:46,025 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:46,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-18 03:13:46,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:46,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:13:46,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:46,731 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_29 Int)) (and (<= c_~j~0 (+ v_~i~0_29 c_~i~0 2)) (<= c_~i~0 (+ (* 2 v_~i~0_29) 2)) (<= (div (+ (* v_~i~0_29 (- 1)) 1) (- 2)) 2))) is different from true [2020-04-18 03:13:46,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:47,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:47,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:47,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:13:47,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348445938] [2020-04-18 03:13:47,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:13:47,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:47,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:13:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=274, Unknown=2, NotChecked=34, Total=380 [2020-04-18 03:13:47,170 INFO L87 Difference]: Start difference. First operand 3667 states and 10181 transitions. Second operand 20 states. [2020-04-18 03:13:50,170 WARN L192 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-04-18 03:13:52,485 WARN L192 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-04-18 03:14:08,100 WARN L192 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2020-04-18 03:14:10,097 WARN L192 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-04-18 03:14:17,819 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-04-18 03:14:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:17,967 INFO L93 Difference]: Finished difference Result 7032 states and 18672 transitions. [2020-04-18 03:14:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-04-18 03:14:17,968 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:14:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:17,976 INFO L225 Difference]: With dead ends: 7032 [2020-04-18 03:14:17,976 INFO L226 Difference]: Without dead ends: 6774 [2020-04-18 03:14:17,977 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=727, Invalid=2805, Unknown=12, NotChecked=116, Total=3660 [2020-04-18 03:14:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6774 states. [2020-04-18 03:14:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6774 to 3834. [2020-04-18 03:14:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3834 states. [2020-04-18 03:14:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 10730 transitions. [2020-04-18 03:14:18,223 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 10730 transitions. Word has length 52 [2020-04-18 03:14:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:18,224 INFO L479 AbstractCegarLoop]: Abstraction has 3834 states and 10730 transitions. [2020-04-18 03:14:18,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:14:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 10730 transitions. [2020-04-18 03:14:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:18,233 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:18,233 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:18,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:18,439 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2088317019, now seen corresponding path program 10 times [2020-04-18 03:14:18,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:18,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721233472] [2020-04-18 03:14:18,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:18,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721233472] [2020-04-18 03:14:18,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459234851] [2020-04-18 03:14:18,695 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:18,748 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:14:18,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:18,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:18,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:18,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:18,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:18,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:18,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-04-18 03:14:18,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000594927] [2020-04-18 03:14:18,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 03:14:18,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:18,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 03:14:18,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:14:18,931 INFO L87 Difference]: Start difference. First operand 3834 states and 10730 transitions. Second operand 19 states. [2020-04-18 03:14:20,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:20,736 INFO L93 Difference]: Finished difference Result 8351 states and 22315 transitions. [2020-04-18 03:14:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-04-18 03:14:20,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-04-18 03:14:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:20,746 INFO L225 Difference]: With dead ends: 8351 [2020-04-18 03:14:20,746 INFO L226 Difference]: Without dead ends: 7817 [2020-04-18 03:14:20,748 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=858, Invalid=3834, Unknown=0, NotChecked=0, Total=4692 [2020-04-18 03:14:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7817 states. [2020-04-18 03:14:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7817 to 3935. [2020-04-18 03:14:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3935 states. [2020-04-18 03:14:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3935 states to 3935 states and 11068 transitions. [2020-04-18 03:14:20,887 INFO L78 Accepts]: Start accepts. Automaton has 3935 states and 11068 transitions. Word has length 52 [2020-04-18 03:14:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:20,888 INFO L479 AbstractCegarLoop]: Abstraction has 3935 states and 11068 transitions. [2020-04-18 03:14:20,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 03:14:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3935 states and 11068 transitions. [2020-04-18 03:14:20,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:20,897 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:20,897 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:21,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:21,103 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2016510169, now seen corresponding path program 11 times [2020-04-18 03:14:21,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:21,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105211314] [2020-04-18 03:14:21,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:21,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105211314] [2020-04-18 03:14:21,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127560671] [2020-04-18 03:14:21,297 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:21,344 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 03:14:21,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:21,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:21,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:21,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:21,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:21,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:21,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-04-18 03:14:21,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455078109] [2020-04-18 03:14:21,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 03:14:21,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:21,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 03:14:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:14:21,507 INFO L87 Difference]: Start difference. First operand 3935 states and 11068 transitions. Second operand 19 states. [2020-04-18 03:14:23,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:23,191 INFO L93 Difference]: Finished difference Result 8173 states and 21881 transitions. [2020-04-18 03:14:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-04-18 03:14:23,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-04-18 03:14:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:23,203 INFO L225 Difference]: With dead ends: 8173 [2020-04-18 03:14:23,204 INFO L226 Difference]: Without dead ends: 7809 [2020-04-18 03:14:23,205 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=787, Invalid=3373, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 03:14:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2020-04-18 03:14:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 4037. [2020-04-18 03:14:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4037 states. [2020-04-18 03:14:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4037 states to 4037 states and 11443 transitions. [2020-04-18 03:14:23,326 INFO L78 Accepts]: Start accepts. Automaton has 4037 states and 11443 transitions. Word has length 52 [2020-04-18 03:14:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:23,327 INFO L479 AbstractCegarLoop]: Abstraction has 4037 states and 11443 transitions. [2020-04-18 03:14:23,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 03:14:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4037 states and 11443 transitions. [2020-04-18 03:14:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:23,334 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:23,335 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:23,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:23,538 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:23,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1072603441, now seen corresponding path program 2 times [2020-04-18 03:14:23,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:23,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501383356] [2020-04-18 03:14:23,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:23,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501383356] [2020-04-18 03:14:23,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349586491] [2020-04-18 03:14:23,750 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:23,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:14:23,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:23,804 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:23,805 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:23,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:23,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:23,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:23,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:14:23,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133377318] [2020-04-18 03:14:23,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:14:23,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:23,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:14:23,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:14:23,988 INFO L87 Difference]: Start difference. First operand 4037 states and 11443 transitions. Second operand 20 states. [2020-04-18 03:14:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:26,311 INFO L93 Difference]: Finished difference Result 9399 states and 24697 transitions. [2020-04-18 03:14:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-04-18 03:14:26,311 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:14:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:26,320 INFO L225 Difference]: With dead ends: 9399 [2020-04-18 03:14:26,320 INFO L226 Difference]: Without dead ends: 8407 [2020-04-18 03:14:26,323 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1245, Invalid=5895, Unknown=0, NotChecked=0, Total=7140 [2020-04-18 03:14:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8407 states. [2020-04-18 03:14:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8407 to 4564. [2020-04-18 03:14:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4564 states. [2020-04-18 03:14:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 12734 transitions. [2020-04-18 03:14:26,420 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 12734 transitions. Word has length 52 [2020-04-18 03:14:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:26,420 INFO L479 AbstractCegarLoop]: Abstraction has 4564 states and 12734 transitions. [2020-04-18 03:14:26,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:14:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 12734 transitions. [2020-04-18 03:14:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:26,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:26,428 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:26,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:26,632 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1759355097, now seen corresponding path program 12 times [2020-04-18 03:14:26,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:26,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521563578] [2020-04-18 03:14:26,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:26,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521563578] [2020-04-18 03:14:26,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435848223] [2020-04-18 03:14:26,810 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:26,859 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-18 03:14:26,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:26,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:26,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:27,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:35,145 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-04-18 03:14:35,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:35,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:35,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:14:35,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738993678] [2020-04-18 03:14:35,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:14:35,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:35,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:14:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=306, Unknown=2, NotChecked=0, Total=380 [2020-04-18 03:14:35,158 INFO L87 Difference]: Start difference. First operand 4564 states and 12734 transitions. Second operand 20 states. [2020-04-18 03:14:35,625 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-04-18 03:14:36,268 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 12 [2020-04-18 03:14:36,619 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2020-04-18 03:14:54,318 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-04-18 03:15:39,042 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-04-18 03:15:59,156 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-04-18 03:16:08,314 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-04-18 03:16:20,632 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-18 03:16:52,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:16:52,997 INFO L93 Difference]: Finished difference Result 9483 states and 24992 transitions. [2020-04-18 03:16:52,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-04-18 03:16:52,998 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:16:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:16:53,007 INFO L225 Difference]: With dead ends: 9483 [2020-04-18 03:16:53,008 INFO L226 Difference]: Without dead ends: 9125 [2020-04-18 03:16:53,009 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=693, Invalid=2836, Unknown=11, NotChecked=0, Total=3540 [2020-04-18 03:16:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2020-04-18 03:16:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 5337. [2020-04-18 03:16:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5337 states. [2020-04-18 03:16:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 14950 transitions. [2020-04-18 03:16:53,126 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 14950 transitions. Word has length 52 [2020-04-18 03:16:53,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:16:53,127 INFO L479 AbstractCegarLoop]: Abstraction has 5337 states and 14950 transitions. [2020-04-18 03:16:53,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:16:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 14950 transitions. [2020-04-18 03:16:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:16:53,136 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:16:53,136 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:16:53,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:53,343 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:16:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:16:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash -794942203, now seen corresponding path program 13 times [2020-04-18 03:16:53,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:16:53,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238877963] [2020-04-18 03:16:53,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:16:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:53,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238877963] [2020-04-18 03:16:53,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979392898] [2020-04-18 03:16:53,552 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:53,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:16:53,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:16:53,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:53,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:53,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:16:53,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-04-18 03:16:53,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340909083] [2020-04-18 03:16:53,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 03:16:53,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:16:53,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 03:16:53,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:16:53,765 INFO L87 Difference]: Start difference. First operand 5337 states and 14950 transitions. Second operand 19 states. [2020-04-18 03:16:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:16:55,454 INFO L93 Difference]: Finished difference Result 9602 states and 25812 transitions. [2020-04-18 03:16:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-04-18 03:16:55,455 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-04-18 03:16:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:16:55,466 INFO L225 Difference]: With dead ends: 9602 [2020-04-18 03:16:55,467 INFO L226 Difference]: Without dead ends: 9208 [2020-04-18 03:16:55,468 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=696, Invalid=3086, Unknown=0, NotChecked=0, Total=3782 [2020-04-18 03:16:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9208 states. [2020-04-18 03:16:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9208 to 4544. [2020-04-18 03:16:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4544 states. [2020-04-18 03:16:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 12720 transitions. [2020-04-18 03:16:55,648 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 12720 transitions. Word has length 52 [2020-04-18 03:16:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:16:55,648 INFO L479 AbstractCegarLoop]: Abstraction has 4544 states and 12720 transitions. [2020-04-18 03:16:55,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 03:16:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 12720 transitions. [2020-04-18 03:16:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:16:55,656 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:16:55,657 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:16:55,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:55,860 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:16:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:16:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash -723765185, now seen corresponding path program 14 times [2020-04-18 03:16:55,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:16:55,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776757410] [2020-04-18 03:16:55,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:16:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:56,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776757410] [2020-04-18 03:16:56,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714432820] [2020-04-18 03:16:56,041 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:56,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:16:56,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:16:56,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:16:56,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:16:56,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:56,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:56,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:16:56,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-04-18 03:16:56,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143031053] [2020-04-18 03:16:56,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 03:16:56,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:16:56,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 03:16:56,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:16:56,243 INFO L87 Difference]: Start difference. First operand 4544 states and 12720 transitions. Second operand 19 states. [2020-04-18 03:16:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:16:57,580 INFO L93 Difference]: Finished difference Result 8691 states and 23443 transitions. [2020-04-18 03:16:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-04-18 03:16:57,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-04-18 03:16:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:16:57,590 INFO L225 Difference]: With dead ends: 8691 [2020-04-18 03:16:57,590 INFO L226 Difference]: Without dead ends: 8327 [2020-04-18 03:16:57,592 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=668, Invalid=2754, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 03:16:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2020-04-18 03:16:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 4369. [2020-04-18 03:16:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4369 states. [2020-04-18 03:16:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 12155 transitions. [2020-04-18 03:16:57,664 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 12155 transitions. Word has length 52 [2020-04-18 03:16:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:16:57,664 INFO L479 AbstractCegarLoop]: Abstraction has 4369 states and 12155 transitions. [2020-04-18 03:16:57,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 03:16:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 12155 transitions. [2020-04-18 03:16:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:16:57,670 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:16:57,670 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:16:57,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:57,872 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:16:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:16:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1954638193, now seen corresponding path program 15 times [2020-04-18 03:16:57,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:16:57,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454228685] [2020-04-18 03:16:57,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:16:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:58,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454228685] [2020-04-18 03:16:58,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100591700] [2020-04-18 03:16:58,074 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:58,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 03:16:58,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:16:58,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:16:58,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:16:58,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:58,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:58,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:16:58,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-04-18 03:16:58,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643622816] [2020-04-18 03:16:58,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 03:16:58,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:16:58,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 03:16:58,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:16:58,513 INFO L87 Difference]: Start difference. First operand 4369 states and 12155 transitions. Second operand 19 states. [2020-04-18 03:17:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:00,970 INFO L93 Difference]: Finished difference Result 8469 states and 22642 transitions. [2020-04-18 03:17:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-04-18 03:17:00,971 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-04-18 03:17:00,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:00,985 INFO L225 Difference]: With dead ends: 8469 [2020-04-18 03:17:00,985 INFO L226 Difference]: Without dead ends: 8105 [2020-04-18 03:17:00,987 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=622, Invalid=2683, Unknown=1, NotChecked=0, Total=3306 [2020-04-18 03:17:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8105 states. [2020-04-18 03:17:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8105 to 4265. [2020-04-18 03:17:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4265 states. [2020-04-18 03:17:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4265 states to 4265 states and 11835 transitions. [2020-04-18 03:17:01,129 INFO L78 Accepts]: Start accepts. Automaton has 4265 states and 11835 transitions. Word has length 52 [2020-04-18 03:17:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:01,130 INFO L479 AbstractCegarLoop]: Abstraction has 4265 states and 11835 transitions. [2020-04-18 03:17:01,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 03:17:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4265 states and 11835 transitions. [2020-04-18 03:17:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-04-18 03:17:01,140 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:01,140 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:01,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:01,354 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:01,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1785449252, now seen corresponding path program 16 times [2020-04-18 03:17:01,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:01,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029128249] [2020-04-18 03:17:01,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:01,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029128249] [2020-04-18 03:17:01,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343325698] [2020-04-18 03:17:01,675 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:01,759 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:17:01,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:01,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 03:17:01,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:02,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:02,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:02,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:02,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2020-04-18 03:17:02,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109938791] [2020-04-18 03:17:02,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 03:17:02,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:02,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 03:17:02,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:17:02,114 INFO L87 Difference]: Start difference. First operand 4265 states and 11835 transitions. Second operand 21 states. [2020-04-18 03:17:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:03,817 INFO L93 Difference]: Finished difference Result 8840 states and 23682 transitions. [2020-04-18 03:17:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-04-18 03:17:03,818 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-04-18 03:17:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:03,828 INFO L225 Difference]: With dead ends: 8840 [2020-04-18 03:17:03,828 INFO L226 Difference]: Without dead ends: 8428 [2020-04-18 03:17:03,829 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=792, Invalid=3498, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 03:17:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2020-04-18 03:17:03,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 4600. [2020-04-18 03:17:03,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4600 states. [2020-04-18 03:17:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 12811 transitions. [2020-04-18 03:17:03,914 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 12811 transitions. Word has length 57 [2020-04-18 03:17:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:03,914 INFO L479 AbstractCegarLoop]: Abstraction has 4600 states and 12811 transitions. [2020-04-18 03:17:03,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 03:17:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 12811 transitions. [2020-04-18 03:17:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-04-18 03:17:03,919 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:03,919 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:04,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:04,123 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:04,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:04,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1918451338, now seen corresponding path program 17 times [2020-04-18 03:17:04,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:04,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895996348] [2020-04-18 03:17:04,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:04,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895996348] [2020-04-18 03:17:04,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515964790] [2020-04-18 03:17:04,356 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:04,408 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-18 03:17:04,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:04,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 03:17:04,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:04,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:04,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:04,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:04,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2020-04-18 03:17:04,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161533573] [2020-04-18 03:17:04,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 03:17:04,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 03:17:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:17:04,600 INFO L87 Difference]: Start difference. First operand 4600 states and 12811 transitions. Second operand 21 states. [2020-04-18 03:17:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:06,351 INFO L93 Difference]: Finished difference Result 8666 states and 23254 transitions. [2020-04-18 03:17:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-04-18 03:17:06,351 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-04-18 03:17:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:06,360 INFO L225 Difference]: With dead ends: 8666 [2020-04-18 03:17:06,361 INFO L226 Difference]: Without dead ends: 8302 [2020-04-18 03:17:06,361 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=780, Invalid=3510, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 03:17:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8302 states. [2020-04-18 03:17:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8302 to 4555. [2020-04-18 03:17:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4555 states. [2020-04-18 03:17:06,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 12682 transitions. [2020-04-18 03:17:06,435 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 12682 transitions. Word has length 57 [2020-04-18 03:17:06,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:06,436 INFO L479 AbstractCegarLoop]: Abstraction has 4555 states and 12682 transitions. [2020-04-18 03:17:06,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 03:17:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 12682 transitions. [2020-04-18 03:17:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-04-18 03:17:06,441 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:06,441 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:06,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:06,643 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:06,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1989628356, now seen corresponding path program 18 times [2020-04-18 03:17:06,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:06,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548639034] [2020-04-18 03:17:06,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:06,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548639034] [2020-04-18 03:17:06,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775480427] [2020-04-18 03:17:06,856 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:06,927 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-18 03:17:06,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:06,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 03:17:06,929 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:09,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:09,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:09,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:09,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2020-04-18 03:17:09,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141361542] [2020-04-18 03:17:09,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 03:17:09,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 03:17:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=335, Unknown=2, NotChecked=0, Total=420 [2020-04-18 03:17:09,958 INFO L87 Difference]: Start difference. First operand 4555 states and 12682 transitions. Second operand 21 states. [2020-04-18 03:17:12,711 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-18 03:17:13,562 WARN L192 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-04-18 03:17:14,847 WARN L192 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-04-18 03:17:15,748 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-04-18 03:17:17,930 WARN L192 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2020-04-18 03:17:19,854 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-04-18 03:17:20,028 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-18 03:17:21,365 WARN L192 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-04-18 03:17:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:25,267 INFO L93 Difference]: Finished difference Result 9414 states and 25292 transitions. [2020-04-18 03:17:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-04-18 03:17:25,268 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-04-18 03:17:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:25,279 INFO L225 Difference]: With dead ends: 9414 [2020-04-18 03:17:25,279 INFO L226 Difference]: Without dead ends: 9050 [2020-04-18 03:17:25,280 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=838, Invalid=3710, Unknown=8, NotChecked=0, Total=4556 [2020-04-18 03:17:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2020-04-18 03:17:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 4648. [2020-04-18 03:17:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4648 states. [2020-04-18 03:17:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 12945 transitions. [2020-04-18 03:17:25,412 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 12945 transitions. Word has length 57 [2020-04-18 03:17:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:25,413 INFO L479 AbstractCegarLoop]: Abstraction has 4648 states and 12945 transitions. [2020-04-18 03:17:25,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 03:17:25,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 12945 transitions. [2020-04-18 03:17:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-04-18 03:17:25,418 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:25,419 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:25,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:25,620 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:25,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:25,620 INFO L82 PathProgramCache]: Analyzing trace with hash 839313652, now seen corresponding path program 19 times [2020-04-18 03:17:25,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:25,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641475814] [2020-04-18 03:17:25,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:25,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641475814] [2020-04-18 03:17:25,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092695866] [2020-04-18 03:17:25,813 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:25,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 03:17:25,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:38,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:38,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:38,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:38,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-04-18 03:17:38,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871399765] [2020-04-18 03:17:38,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 03:17:38,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 03:17:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=372, Unknown=4, NotChecked=0, Total=462 [2020-04-18 03:17:38,997 INFO L87 Difference]: Start difference. First operand 4648 states and 12945 transitions. Second operand 22 states. [2020-04-18 03:17:48,072 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-04-18 03:17:51,290 WARN L192 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-04-18 03:17:55,761 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 Received shutdown request... [2020-04-18 03:17:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 03:17:58,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:58,331 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 03:17:58,338 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 03:17:58,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 03:17:58 BasicIcfg [2020-04-18 03:17:58,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 03:17:58,340 INFO L168 Benchmark]: Toolchain (without parser) took 276021.65 ms. Allocated memory was 144.7 MB in the beginning and 632.8 MB in the end (delta: 488.1 MB). Free memory was 101.7 MB in the beginning and 263.4 MB in the end (delta: -161.7 MB). Peak memory consumption was 326.4 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,340 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 700.17 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 99.7 MB in the beginning and 162.6 MB in the end (delta: -62.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,341 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.72 ms. Allocated memory is still 202.9 MB. Free memory was 162.6 MB in the beginning and 160.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,341 INFO L168 Benchmark]: Boogie Preprocessor took 35.39 ms. Allocated memory is still 202.9 MB. Free memory was 160.6 MB in the beginning and 158.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,342 INFO L168 Benchmark]: RCFGBuilder took 441.00 ms. Allocated memory is still 202.9 MB. Free memory was 158.6 MB in the beginning and 138.8 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,342 INFO L168 Benchmark]: TraceAbstraction took 274739.64 ms. Allocated memory was 202.9 MB in the beginning and 632.8 MB in the end (delta: 429.9 MB). Free memory was 138.1 MB in the beginning and 263.4 MB in the end (delta: -125.3 MB). Peak memory consumption was 304.6 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,344 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 700.17 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 99.7 MB in the beginning and 162.6 MB in the end (delta: -62.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 75.72 ms. Allocated memory is still 202.9 MB. Free memory was 162.6 MB in the beginning and 160.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.39 ms. Allocated memory is still 202.9 MB. Free memory was 160.6 MB in the beginning and 158.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 441.00 ms. Allocated memory is still 202.9 MB. Free memory was 158.6 MB in the beginning and 138.8 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 274739.64 ms. Allocated memory was 202.9 MB in the beginning and 632.8 MB in the end (delta: 429.9 MB). Free memory was 138.1 MB in the beginning and 263.4 MB in the end (delta: -125.3 MB). Peak memory consumption was 304.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (4648states) and FLOYD_HOARE automaton (currently 38 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (1539 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 274.6s, OverallIterations: 24, TraceHistogramMax: 5, AutomataDifference: 231.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 3418 SDtfs, 26627 SDslu, 39370 SDs, 0 SdLazy, 6871 SolverSat, 1873 SolverUnsat, 92 SolverUnknown, 0 SolverNotchecked, 122.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2185 GetRequests, 919 SyntacticMatches, 20 SemanticMatches, 1246 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 22302 ImplicationChecksByTransitivity, 136.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5337occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.6s AutomataMinimizationTime, 23 MinimizatonAttempts, 66601 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 33.7s InterpolantComputationTime, 2185 NumberOfCodeBlocks, 2185 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 2140 ConstructedInterpolants, 45 QuantifiedInterpolants, 1193201 SizeOfPredicates, 84 NumberOfNonLiveVariables, 2414 ConjunctsInSsa, 265 ConjunctsInUnsatCore, 45 InterpolantComputations, 3 PerfectInterpolantSequences, 0/784 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown