/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_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 03:13:20,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 03:13:20,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 03:13:20,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 03:13:20,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 03:13:20,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 03:13:20,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 03:13:20,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 03:13:20,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 03:13:20,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 03:13:20,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 03:13:20,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 03:13:20,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 03:13:20,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 03:13:20,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 03:13:20,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 03:13:20,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 03:13:20,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 03:13:20,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 03:13:20,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 03:13:20,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 03:13:20,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 03:13:20,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 03:13:20,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 03:13:20,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 03:13:20,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 03:13:20,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 03:13:20,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 03:13:20,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 03:13:20,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 03:13:20,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 03:13:20,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 03:13:20,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 03:13:20,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 03:13:20,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 03:13:20,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 03:13:20,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 03:13:20,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 03:13:20,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 03:13:20,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 03:13:21,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 03:13:21,002 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 03:13:21,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 03:13:21,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 03:13:21,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 03:13:21,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 03:13:21,026 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 03:13:21,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 03:13:21,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 03:13:21,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 03:13:21,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 03:13:21,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 03:13:21,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 03:13:21,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 03:13:21,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 03:13:21,027 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 03:13:21,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 03:13:21,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 03:13:21,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 03:13:21,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 03:13:21,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 03:13:21,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 03:13:21,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 03:13:21,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 03:13:21,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 03:13:21,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 03:13:21,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 03:13:21,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-18 03:13:21,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 03:13:21,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-04-18 03:13:21,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 03:13:21,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 03:13:21,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 03:13:21,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 03:13:21,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 03:13:21,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 03:13:21,363 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 03:13:21,364 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-04-18 03:13:21,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fbe136c8/c6762af8090b40be8b05c821d2d10461/FLAGcc32ea0f4 [2020-04-18 03:13:21,978 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 03:13:21,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-04-18 03:13:21,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fbe136c8/c6762af8090b40be8b05c821d2d10461/FLAGcc32ea0f4 [2020-04-18 03:13:22,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fbe136c8/c6762af8090b40be8b05c821d2d10461 [2020-04-18 03:13:22,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 03:13:22,325 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 03:13:22,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:22,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 03:13:22,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 03:13:22,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2c3685 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 03:13:22,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 03:13:22,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 03:13:22,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:22,841 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 03:13:22,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:22,999 INFO L208 MainTranslator]: Completed translation [2020-04-18 03:13:23,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23 WrapperNode [2020-04-18 03:13:23,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:23,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 03:13:23,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 03:13:23,010 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 03:13:23,051 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 03:13:23,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 03:13:23,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 03:13:23,084 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 03:13:23,084 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 03:13:23,086 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 03:13:23,087 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 03:13:23,093 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 03:13:23,097 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 03:13:23,099 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 03:13:23,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 03:13:23,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 03:13:23,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 03:13:23,104 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 03:13:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 03:13:23,174 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 03:13:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 03:13:23,174 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 03:13:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 03:13:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 03:13:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 03:13:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 03:13:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 03:13:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 03:13:23,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 03:13:23,177 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 03:13:23,558 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 03:13:23,558 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 03:13:23,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:13:23 BoogieIcfgContainer [2020-04-18 03:13:23,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 03:13:23,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 03:13:23,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 03:13:23,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 03:13:23,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:13:22" (1/3) ... [2020-04-18 03:13:23,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67083506 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 03:13:23,568 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 03:13:23,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67083506 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 03:13:23,569 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 03:13:23,571 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-04-18 03:13:23,581 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 03:13:23,582 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 03:13:23,589 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 03:13:23,590 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 03:13:23,613 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,613 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,613 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,614 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,615 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,615 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,615 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,616 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,616 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,616 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,616 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,617 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,617 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,617 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,618 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,618 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,618 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,619 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,619 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,619 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,619 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,620 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,620 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,621 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,621 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,621 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,621 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,622 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,622 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,622 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,625 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,626 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,626 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,626 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,626 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,627 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,632 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,632 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,632 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,632 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,633 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,633 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,655 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 03:13:23,672 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 03:13:23,672 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 03:13:23,672 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 03:13:23,672 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 03:13:23,673 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 03:13:23,673 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 03:13:23,673 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 03:13:23,673 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 03:13:23,684 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 03:13:23,790 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1741 states. [2020-04-18 03:13:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states. [2020-04-18 03:13:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 03:13:23,804 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:23,805 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 03:13:23,805 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash 627590565, now seen corresponding path program 1 times [2020-04-18 03:13:23,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:23,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844684413] [2020-04-18 03:13:23,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:24,280 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 03:13:24,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844684413] [2020-04-18 03:13:24,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:24,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 03:13:24,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577272976] [2020-04-18 03:13:24,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 03:13:24,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 03:13:24,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 03:13:24,312 INFO L87 Difference]: Start difference. First operand 1741 states. Second operand 6 states. [2020-04-18 03:13:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:24,629 INFO L93 Difference]: Finished difference Result 3726 states and 10822 transitions. [2020-04-18 03:13:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-18 03:13:24,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-04-18 03:13:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:24,658 INFO L225 Difference]: With dead ends: 3726 [2020-04-18 03:13:24,658 INFO L226 Difference]: Without dead ends: 1164 [2020-04-18 03:13:24,660 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-04-18 03:13:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2020-04-18 03:13:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 899. [2020-04-18 03:13:24,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-04-18 03:13:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2439 transitions. [2020-04-18 03:13:24,816 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2439 transitions. Word has length 22 [2020-04-18 03:13:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:24,817 INFO L479 AbstractCegarLoop]: Abstraction has 899 states and 2439 transitions. [2020-04-18 03:13:24,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 03:13:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2439 transitions. [2020-04-18 03:13:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 03:13:24,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:24,832 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 03:13:24,833 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1828680335, now seen corresponding path program 1 times [2020-04-18 03:13:24,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:24,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781495566] [2020-04-18 03:13:24,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,109 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 03:13:25,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781495566] [2020-04-18 03:13:25,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:13:25,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623625396] [2020-04-18 03:13:25,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:13:25,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:13:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:13:25,113 INFO L87 Difference]: Start difference. First operand 899 states and 2439 transitions. Second operand 7 states. [2020-04-18 03:13:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:25,477 INFO L93 Difference]: Finished difference Result 2044 states and 5401 transitions. [2020-04-18 03:13:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 03:13:25,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-04-18 03:13:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:25,493 INFO L225 Difference]: With dead ends: 2044 [2020-04-18 03:13:25,493 INFO L226 Difference]: Without dead ends: 1592 [2020-04-18 03:13:25,495 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 03:13:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2020-04-18 03:13:25,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1175. [2020-04-18 03:13:25,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-04-18 03:13:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3155 transitions. [2020-04-18 03:13:25,545 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3155 transitions. Word has length 27 [2020-04-18 03:13:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:25,546 INFO L479 AbstractCegarLoop]: Abstraction has 1175 states and 3155 transitions. [2020-04-18 03:13:25,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:13:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3155 transitions. [2020-04-18 03:13:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:25,549 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:25,549 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 03:13:25,550 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:25,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1443640527, now seen corresponding path program 1 times [2020-04-18 03:13:25,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:25,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083720541] [2020-04-18 03:13:25,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,765 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 03:13:25,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083720541] [2020-04-18 03:13:25,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-04-18 03:13:25,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821998944] [2020-04-18 03:13:25,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 03:13:25,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 03:13:25,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-04-18 03:13:25,768 INFO L87 Difference]: Start difference. First operand 1175 states and 3155 transitions. Second operand 8 states. [2020-04-18 03:13:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:26,093 INFO L93 Difference]: Finished difference Result 2304 states and 6087 transitions. [2020-04-18 03:13:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 03:13:26,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-04-18 03:13:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:26,106 INFO L225 Difference]: With dead ends: 2304 [2020-04-18 03:13:26,106 INFO L226 Difference]: Without dead ends: 1876 [2020-04-18 03:13:26,107 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:13:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2020-04-18 03:13:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1313. [2020-04-18 03:13:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1313 states. [2020-04-18 03:13:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3539 transitions. [2020-04-18 03:13:26,155 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3539 transitions. Word has length 32 [2020-04-18 03:13:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:26,155 INFO L479 AbstractCegarLoop]: Abstraction has 1313 states and 3539 transitions. [2020-04-18 03:13:26,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 03:13:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3539 transitions. [2020-04-18 03:13:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:26,158 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:26,158 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 03:13:26,159 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:26,159 INFO L82 PathProgramCache]: Analyzing trace with hash 637689491, now seen corresponding path program 2 times [2020-04-18 03:13:26,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:26,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045000503] [2020-04-18 03:13:26,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,300 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 03:13:26,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045000503] [2020-04-18 03:13:26,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:26,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-04-18 03:13:26,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623118228] [2020-04-18 03:13:26,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 03:13:26,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 03:13:26,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-04-18 03:13:26,303 INFO L87 Difference]: Start difference. First operand 1313 states and 3539 transitions. Second operand 8 states. [2020-04-18 03:13:26,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:26,638 INFO L93 Difference]: Finished difference Result 2452 states and 6477 transitions. [2020-04-18 03:13:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 03:13:26,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-04-18 03:13:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:26,652 INFO L225 Difference]: With dead ends: 2452 [2020-04-18 03:13:26,652 INFO L226 Difference]: Without dead ends: 2146 [2020-04-18 03:13:26,653 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:13:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2020-04-18 03:13:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1475. [2020-04-18 03:13:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1475 states. [2020-04-18 03:13:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 3937 transitions. [2020-04-18 03:13:26,704 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 3937 transitions. Word has length 32 [2020-04-18 03:13:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:26,704 INFO L479 AbstractCegarLoop]: Abstraction has 1475 states and 3937 transitions. [2020-04-18 03:13:26,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 03:13:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 3937 transitions. [2020-04-18 03:13:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:26,708 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:26,709 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 03:13:26,709 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1255519260, now seen corresponding path program 1 times [2020-04-18 03:13:26,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:26,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669751524] [2020-04-18 03:13:26,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,876 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 03:13:26,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669751524] [2020-04-18 03:13:26,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481355838] [2020-04-18 03:13:26,877 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 03:13:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:26,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:27,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:27,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:27,083 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 03:13:27,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:27,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:27,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147944512] [2020-04-18 03:13:27,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:27,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:27,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:27,086 INFO L87 Difference]: Start difference. First operand 1475 states and 3937 transitions. Second operand 14 states. [2020-04-18 03:13:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:28,070 INFO L93 Difference]: Finished difference Result 4280 states and 11155 transitions. [2020-04-18 03:13:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:13:28,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:28,092 INFO L225 Difference]: With dead ends: 4280 [2020-04-18 03:13:28,092 INFO L226 Difference]: Without dead ends: 3240 [2020-04-18 03:13:28,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:13:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2020-04-18 03:13:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 2101. [2020-04-18 03:13:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2101 states. [2020-04-18 03:13:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5623 transitions. [2020-04-18 03:13:28,176 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5623 transitions. Word has length 37 [2020-04-18 03:13:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:28,177 INFO L479 AbstractCegarLoop]: Abstraction has 2101 states and 5623 transitions. [2020-04-18 03:13:28,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5623 transitions. [2020-04-18 03:13:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:28,182 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:28,183 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 03:13:28,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:28,386 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:28,386 INFO L82 PathProgramCache]: Analyzing trace with hash -520422237, now seen corresponding path program 1 times [2020-04-18 03:13:28,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:28,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082147511] [2020-04-18 03:13:28,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,578 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 03:13:28,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082147511] [2020-04-18 03:13:28,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236645497] [2020-04-18 03:13:28,579 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 03:13:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:28,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:28,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:28,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:28,868 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 03:13:28,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:28,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:28,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880523874] [2020-04-18 03:13:28,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:28,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:28,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:28,870 INFO L87 Difference]: Start difference. First operand 2101 states and 5623 transitions. Second operand 16 states. [2020-04-18 03:13:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:30,118 INFO L93 Difference]: Finished difference Result 4706 states and 12208 transitions. [2020-04-18 03:13:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-18 03:13:30,119 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:30,143 INFO L225 Difference]: With dead ends: 4706 [2020-04-18 03:13:30,143 INFO L226 Difference]: Without dead ends: 4118 [2020-04-18 03:13:30,144 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:13:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2020-04-18 03:13:30,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2314. [2020-04-18 03:13:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-04-18 03:13:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 6210 transitions. [2020-04-18 03:13:30,225 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 6210 transitions. Word has length 42 [2020-04-18 03:13:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:30,225 INFO L479 AbstractCegarLoop]: Abstraction has 2314 states and 6210 transitions. [2020-04-18 03:13:30,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 6210 transitions. [2020-04-18 03:13:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:30,230 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:30,231 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 03:13:30,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:30,443 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:30,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1256086345, now seen corresponding path program 2 times [2020-04-18 03:13:30,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:30,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248851704] [2020-04-18 03:13:30,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:30,640 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 03:13:30,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248851704] [2020-04-18 03:13:30,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546047237] [2020-04-18 03:13:30,641 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 03:13:30,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:30,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:30,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:30,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:30,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:30,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:30,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:30,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:30,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830994206] [2020-04-18 03:13:30,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:30,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:30,806 INFO L87 Difference]: Start difference. First operand 2314 states and 6210 transitions. Second operand 16 states. [2020-04-18 03:13:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:31,978 INFO L93 Difference]: Finished difference Result 5714 states and 14843 transitions. [2020-04-18 03:13:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-18 03:13:31,979 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:32,006 INFO L225 Difference]: With dead ends: 5714 [2020-04-18 03:13:32,006 INFO L226 Difference]: Without dead ends: 4916 [2020-04-18 03:13:32,007 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 03:13:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2020-04-18 03:13:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 2482. [2020-04-18 03:13:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2020-04-18 03:13:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 6650 transitions. [2020-04-18 03:13:32,094 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 6650 transitions. Word has length 42 [2020-04-18 03:13:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:32,094 INFO L479 AbstractCegarLoop]: Abstraction has 2482 states and 6650 transitions. [2020-04-18 03:13:32,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 6650 transitions. [2020-04-18 03:13:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:32,100 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:32,100 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 03:13:32,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:32,305 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:32,306 INFO L82 PathProgramCache]: Analyzing trace with hash 490795132, now seen corresponding path program 3 times [2020-04-18 03:13:32,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:32,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223283443] [2020-04-18 03:13:32,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:32,514 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 03:13:32,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223283443] [2020-04-18 03:13:32,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239165642] [2020-04-18 03:13:32,521 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 03:13:32,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 03:13:32,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:32,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:32,614 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:32,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:32,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:32,859 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 03:13:32,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:32,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:32,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151553982] [2020-04-18 03:13:32,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:32,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:32,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:32,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:32,866 INFO L87 Difference]: Start difference. First operand 2482 states and 6650 transitions. Second operand 17 states. [2020-04-18 03:13:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:34,035 INFO L93 Difference]: Finished difference Result 5332 states and 13997 transitions. [2020-04-18 03:13:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:13:34,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:34,050 INFO L225 Difference]: With dead ends: 5332 [2020-04-18 03:13:34,050 INFO L226 Difference]: Without dead ends: 4920 [2020-04-18 03:13:34,051 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=431, Invalid=1825, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 03:13:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2020-04-18 03:13:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 2834. [2020-04-18 03:13:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2020-04-18 03:13:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 7724 transitions. [2020-04-18 03:13:34,144 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 7724 transitions. Word has length 47 [2020-04-18 03:13:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:34,146 INFO L479 AbstractCegarLoop]: Abstraction has 2834 states and 7724 transitions. [2020-04-18 03:13:34,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 7724 transitions. [2020-04-18 03:13:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:34,161 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:34,161 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 03:13:34,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:34,369 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:34,369 INFO L82 PathProgramCache]: Analyzing trace with hash -29094556, now seen corresponding path program 4 times [2020-04-18 03:13:34,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:34,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848778840] [2020-04-18 03:13:34,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:34,562 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 03:13:34,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848778840] [2020-04-18 03:13:34,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888018084] [2020-04-18 03:13:34,563 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 03:13:34,607 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:13:34,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:34,608 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:34,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:34,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:34,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:34,767 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 03:13:34,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:34,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:34,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184849312] [2020-04-18 03:13:34,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:34,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:34,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:34,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:34,769 INFO L87 Difference]: Start difference. First operand 2834 states and 7724 transitions. Second operand 17 states. [2020-04-18 03:13:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:35,938 INFO L93 Difference]: Finished difference Result 6151 states and 16235 transitions. [2020-04-18 03:13:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-18 03:13:35,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:35,952 INFO L225 Difference]: With dead ends: 6151 [2020-04-18 03:13:35,952 INFO L226 Difference]: Without dead ends: 5617 [2020-04-18 03:13:35,954 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=549, Invalid=2313, Unknown=0, NotChecked=0, Total=2862 [2020-04-18 03:13:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2020-04-18 03:13:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 2880. [2020-04-18 03:13:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2020-04-18 03:13:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 7895 transitions. [2020-04-18 03:13:36,059 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 7895 transitions. Word has length 47 [2020-04-18 03:13:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:36,060 INFO L479 AbstractCegarLoop]: Abstraction has 2880 states and 7895 transitions. [2020-04-18 03:13:36,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 7895 transitions. [2020-04-18 03:13:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:36,068 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:36,068 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 03:13:36,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:36,272 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash -864451660, now seen corresponding path program 5 times [2020-04-18 03:13:36,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:36,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35557530] [2020-04-18 03:13:36,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:36,501 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 03:13:36,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35557530] [2020-04-18 03:13:36,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460607116] [2020-04-18 03:13:36,502 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 03:13:36,552 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 03:13:36,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:36,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:36,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:36,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:36,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:36,679 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 03:13:36,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:36,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:36,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417268467] [2020-04-18 03:13:36,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:36,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:36,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:36,681 INFO L87 Difference]: Start difference. First operand 2880 states and 7895 transitions. Second operand 17 states. [2020-04-18 03:13:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:37,789 INFO L93 Difference]: Finished difference Result 5862 states and 15578 transitions. [2020-04-18 03:13:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:13:37,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:37,806 INFO L225 Difference]: With dead ends: 5862 [2020-04-18 03:13:37,806 INFO L226 Difference]: Without dead ends: 5498 [2020-04-18 03:13:37,807 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 03:13:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5498 states. [2020-04-18 03:13:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5498 to 2982. [2020-04-18 03:13:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2982 states. [2020-04-18 03:13:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8270 transitions. [2020-04-18 03:13:37,905 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8270 transitions. Word has length 47 [2020-04-18 03:13:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:37,905 INFO L479 AbstractCegarLoop]: Abstraction has 2982 states and 8270 transitions. [2020-04-18 03:13:37,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8270 transitions. [2020-04-18 03:13:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:37,913 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:37,913 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 03:13:38,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:38,117 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:38,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1080226080, now seen corresponding path program 6 times [2020-04-18 03:13:38,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:38,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345077467] [2020-04-18 03:13:38,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:38,347 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 03:13:38,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345077467] [2020-04-18 03:13:38,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968460429] [2020-04-18 03:13:38,348 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 03:13:38,404 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 03:13:38,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:38,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:38,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:38,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:38,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:38,654 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 03:13:38,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:38,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:38,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192303580] [2020-04-18 03:13:38,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:38,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:38,656 INFO L87 Difference]: Start difference. First operand 2982 states and 8270 transitions. Second operand 17 states. [2020-04-18 03:13:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:40,302 INFO L93 Difference]: Finished difference Result 6066 states and 16212 transitions. [2020-04-18 03:13:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:13:40,302 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:40,314 INFO L225 Difference]: With dead ends: 6066 [2020-04-18 03:13:40,314 INFO L226 Difference]: Without dead ends: 5702 [2020-04-18 03:13:40,315 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=443, Invalid=1909, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 03:13:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5702 states. [2020-04-18 03:13:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5702 to 2932. [2020-04-18 03:13:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2932 states. [2020-04-18 03:13:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 8100 transitions. [2020-04-18 03:13:40,393 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 8100 transitions. Word has length 47 [2020-04-18 03:13:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:40,393 INFO L479 AbstractCegarLoop]: Abstraction has 2932 states and 8100 transitions. [2020-04-18 03:13:40,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:40,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 8100 transitions. [2020-04-18 03:13:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:40,399 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:40,400 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 03:13:40,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:40,612 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash 728987418, now seen corresponding path program 7 times [2020-04-18 03:13:40,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:40,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289076413] [2020-04-18 03:13:40,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:40,861 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 03:13:40,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289076413] [2020-04-18 03:13:40,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009475060] [2020-04-18 03:13:40,861 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 03:13:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:40,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:40,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:41,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:42,650 WARN L192 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-04-18 03:13:42,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:42,660 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 03:13:42,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:42,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:42,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135738926] [2020-04-18 03:13:42,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:42,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2020-04-18 03:13:42,662 INFO L87 Difference]: Start difference. First operand 2932 states and 8100 transitions. Second operand 18 states. [2020-04-18 03:13:45,201 WARN L192 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-04-18 03:13:51,733 WARN L192 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-04-18 03:13:55,266 WARN L192 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 03:13:55,728 WARN L192 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-04-18 03:14:20,361 WARN L192 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-18 03:14:27,137 WARN L192 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-18 03:14:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:42,661 INFO L93 Difference]: Finished difference Result 6198 states and 16323 transitions. [2020-04-18 03:14:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-04-18 03:14:42,661 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:14:42,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:42,672 INFO L225 Difference]: With dead ends: 6198 [2020-04-18 03:14:42,672 INFO L226 Difference]: Without dead ends: 5724 [2020-04-18 03:14:42,673 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=533, Invalid=2414, Unknown=23, NotChecked=0, Total=2970 [2020-04-18 03:14:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5724 states. [2020-04-18 03:14:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5724 to 2922. [2020-04-18 03:14:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2922 states. [2020-04-18 03:14:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8078 transitions. [2020-04-18 03:14:42,763 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8078 transitions. Word has length 47 [2020-04-18 03:14:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:42,764 INFO L479 AbstractCegarLoop]: Abstraction has 2922 states and 8078 transitions. [2020-04-18 03:14:42,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:14:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8078 transitions. [2020-04-18 03:14:42,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:42,770 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:42,770 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 03:14:42,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:42,980 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:42,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1639823560, now seen corresponding path program 8 times [2020-04-18 03:14:42,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:42,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414636310] [2020-04-18 03:14:42,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:43,241 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 03:14:43,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414636310] [2020-04-18 03:14:43,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494293651] [2020-04-18 03:14:43,243 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 03:14:43,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:14:43,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:43,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:43,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:43,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:43,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:43,485 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 03:14:43,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:43,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:43,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774376066] [2020-04-18 03:14:43,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:43,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:43,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:43,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:43,487 INFO L87 Difference]: Start difference. First operand 2922 states and 8078 transitions. Second operand 17 states. [2020-04-18 03:14:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:44,694 INFO L93 Difference]: Finished difference Result 6066 states and 16149 transitions. [2020-04-18 03:14:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-18 03:14:44,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:44,703 INFO L225 Difference]: With dead ends: 6066 [2020-04-18 03:14:44,703 INFO L226 Difference]: Without dead ends: 5532 [2020-04-18 03:14:44,705 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=526, Invalid=2444, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 03:14:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2020-04-18 03:14:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 3136. [2020-04-18 03:14:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3136 states. [2020-04-18 03:14:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3136 states to 3136 states and 8706 transitions. [2020-04-18 03:14:44,783 INFO L78 Accepts]: Start accepts. Automaton has 3136 states and 8706 transitions. Word has length 47 [2020-04-18 03:14:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:44,783 INFO L479 AbstractCegarLoop]: Abstraction has 3136 states and 8706 transitions. [2020-04-18 03:14:44,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3136 states and 8706 transitions. [2020-04-18 03:14:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:44,791 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:44,791 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 03:14:44,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:44,995 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash -536445885, now seen corresponding path program 9 times [2020-04-18 03:14:44,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:44,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140929959] [2020-04-18 03:14:44,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:45,291 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 03:14:45,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140929959] [2020-04-18 03:14:45,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349450246] [2020-04-18 03:14:45,293 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:14:45,467 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-18 03:14:45,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:45,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:45,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:45,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:45,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:45,756 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 03:14:45,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:45,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:14:45,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758236205] [2020-04-18 03:14:45,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:14:45,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:14:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:14:45,762 INFO L87 Difference]: Start difference. First operand 3136 states and 8706 transitions. Second operand 20 states. [2020-04-18 03:14:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:47,612 INFO L93 Difference]: Finished difference Result 7558 states and 19829 transitions. [2020-04-18 03:14:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-04-18 03:14:47,613 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:14:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:47,626 INFO L225 Difference]: With dead ends: 7558 [2020-04-18 03:14:47,627 INFO L226 Difference]: Without dead ends: 6970 [2020-04-18 03:14:47,628 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=730, Invalid=3302, Unknown=0, NotChecked=0, Total=4032 [2020-04-18 03:14:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6970 states. [2020-04-18 03:14:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6970 to 3486. [2020-04-18 03:14:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3486 states. [2020-04-18 03:14:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 9682 transitions. [2020-04-18 03:14:47,733 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 9682 transitions. Word has length 52 [2020-04-18 03:14:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:47,734 INFO L479 AbstractCegarLoop]: Abstraction has 3486 states and 9682 transitions. [2020-04-18 03:14:47,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:14:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 9682 transitions. [2020-04-18 03:14:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:47,740 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:47,740 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 03:14:47,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:47,945 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:47,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1056335573, now seen corresponding path program 10 times [2020-04-18 03:14:47,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:47,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214407479] [2020-04-18 03:14:47,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:48,192 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 03:14:48,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214407479] [2020-04-18 03:14:48,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247686908] [2020-04-18 03:14:48,193 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 03:14:48,238 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:14:48,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:48,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:48,240 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:48,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:48,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:48,854 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 03:14:48,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:48,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:14:48,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124841261] [2020-04-18 03:14:48,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:14:48,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:48,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:14:48,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=306, Unknown=1, NotChecked=0, Total=380 [2020-04-18 03:14:48,856 INFO L87 Difference]: Start difference. First operand 3486 states and 9682 transitions. Second operand 20 states. [2020-04-18 03:14:52,346 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-04-18 03:14:56,229 WARN L192 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-04-18 03:15:03,276 WARN L192 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-04-18 03:15:10,839 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-04-18 03:15:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:10,947 INFO L93 Difference]: Finished difference Result 8118 states and 21441 transitions. [2020-04-18 03:15:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-04-18 03:15:10,948 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:15:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:10,958 INFO L225 Difference]: With dead ends: 8118 [2020-04-18 03:15:10,958 INFO L226 Difference]: Without dead ends: 7578 [2020-04-18 03:15:10,960 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=759, Invalid=3385, Unknown=16, NotChecked=0, Total=4160 [2020-04-18 03:15:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2020-04-18 03:15:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 3606. [2020-04-18 03:15:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3606 states. [2020-04-18 03:15:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 10036 transitions. [2020-04-18 03:15:11,065 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 10036 transitions. Word has length 52 [2020-04-18 03:15:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:11,066 INFO L479 AbstractCegarLoop]: Abstraction has 3606 states and 10036 transitions. [2020-04-18 03:15:11,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:15:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 10036 transitions. [2020-04-18 03:15:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:15:11,075 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:11,075 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 03:15:11,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:11,279 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:11,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:11,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2088317019, now seen corresponding path program 11 times [2020-04-18 03:15:11,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:11,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089626415] [2020-04-18 03:15:11,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:11,538 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 03:15:11,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089626415] [2020-04-18 03:15:11,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912932519] [2020-04-18 03:15:11,539 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 03:15:11,591 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 03:15:11,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:15:11,593 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:15:11,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:11,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:11,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:11,782 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 03:15:11,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:11,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:15:11,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210340780] [2020-04-18 03:15:11,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:15:11,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:11,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:15:11,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:15:11,785 INFO L87 Difference]: Start difference. First operand 3606 states and 10036 transitions. Second operand 20 states. [2020-04-18 03:15:14,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:14,102 INFO L93 Difference]: Finished difference Result 9147 states and 24103 transitions. [2020-04-18 03:15:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-04-18 03:15:14,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:15:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:14,156 INFO L225 Difference]: With dead ends: 9147 [2020-04-18 03:15:14,156 INFO L226 Difference]: Without dead ends: 8349 [2020-04-18 03:15:14,158 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1075, Invalid=5087, Unknown=0, NotChecked=0, Total=6162 [2020-04-18 03:15:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2020-04-18 03:15:14,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 3999. [2020-04-18 03:15:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3999 states. [2020-04-18 03:15:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 11035 transitions. [2020-04-18 03:15:14,259 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 11035 transitions. Word has length 52 [2020-04-18 03:15:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:14,260 INFO L479 AbstractCegarLoop]: Abstraction has 3999 states and 11035 transitions. [2020-04-18 03:15:14,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:15:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 11035 transitions. [2020-04-18 03:15:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:15:14,269 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:14,269 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 03:15:14,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:14,481 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2016510169, now seen corresponding path program 12 times [2020-04-18 03:15:14,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:14,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512319283] [2020-04-18 03:15:14,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:14,683 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 03:15:14,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512319283] [2020-04-18 03:15:14,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997560280] [2020-04-18 03:15:14,684 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 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 03:15:14,736 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 03:15:14,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:15:14,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 03:15:14,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:14,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:14,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:14,941 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 03:15:14,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:14,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-04-18 03:15:14,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540702368] [2020-04-18 03:15:14,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 03:15:14,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:14,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 03:15:14,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:15:14,943 INFO L87 Difference]: Start difference. First operand 3999 states and 11035 transitions. Second operand 21 states. [2020-04-18 03:15:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:17,140 INFO L93 Difference]: Finished difference Result 8989 states and 23240 transitions. [2020-04-18 03:15:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-04-18 03:15:17,141 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-04-18 03:15:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:17,155 INFO L225 Difference]: With dead ends: 8989 [2020-04-18 03:15:17,156 INFO L226 Difference]: Without dead ends: 8449 [2020-04-18 03:15:17,159 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=902, Invalid=3928, Unknown=0, NotChecked=0, Total=4830 [2020-04-18 03:15:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2020-04-18 03:15:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 4099. [2020-04-18 03:15:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4099 states. [2020-04-18 03:15:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 11299 transitions. [2020-04-18 03:15:17,289 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 11299 transitions. Word has length 52 [2020-04-18 03:15:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:17,290 INFO L479 AbstractCegarLoop]: Abstraction has 4099 states and 11299 transitions. [2020-04-18 03:15:17,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 03:15:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 11299 transitions. [2020-04-18 03:15:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:15:17,300 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:17,300 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 03:15:17,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:17,512 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1754405385, now seen corresponding path program 13 times [2020-04-18 03:15:17,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:17,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974234085] [2020-04-18 03:15:17,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:17,691 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 03:15:17,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974234085] [2020-04-18 03:15:17,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707808032] [2020-04-18 03:15:17,692 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 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 03:15:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:17,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:15:17,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:20,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:28,097 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-04-18 03:15:28,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:28,109 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 03:15:28,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:28,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:15:28,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107982169] [2020-04-18 03:15:28,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:15:28,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:28,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:15:28,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=305, Unknown=2, NotChecked=0, Total=380 [2020-04-18 03:15:28,110 INFO L87 Difference]: Start difference. First operand 4099 states and 11299 transitions. Second operand 20 states. [2020-04-18 03:15:30,922 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-04-18 03:15:46,105 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-04-18 03:16:01,639 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-04-18 03:16:30,356 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-04-18 03:17:26,127 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-04-18 03:17:40,403 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 39 DAG size of output: 27 Received shutdown request... [2020-04-18 03:18:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-04-18 03:18:03,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:03,940 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 03:18:03,948 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 03:18:03,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 03:18:03 BasicIcfg [2020-04-18 03:18:03,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 03:18:03,950 INFO L168 Benchmark]: Toolchain (without parser) took 281646.85 ms. Allocated memory was 145.8 MB in the beginning and 621.8 MB in the end (delta: 476.1 MB). Free memory was 100.9 MB in the beginning and 112.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 464.1 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:03,950 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 145.8 MB. Free memory is still 120.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-04-18 03:18:03,951 INFO L168 Benchmark]: CACSL2BoogieTranslator took 674.37 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 99.2 MB in the beginning and 162.0 MB in the end (delta: -62.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:03,952 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.59 ms. Allocated memory is still 202.9 MB. Free memory was 162.0 MB in the beginning and 160.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:03,953 INFO L168 Benchmark]: Boogie Preprocessor took 26.42 ms. Allocated memory is still 202.9 MB. Free memory was 160.1 MB in the beginning and 158.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:03,953 INFO L168 Benchmark]: RCFGBuilder took 459.59 ms. Allocated memory is still 202.9 MB. Free memory was 158.2 MB in the beginning and 138.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:03,954 INFO L168 Benchmark]: TraceAbstraction took 280385.11 ms. Allocated memory was 202.9 MB in the beginning and 621.8 MB in the end (delta: 418.9 MB). Free memory was 138.0 MB in the beginning and 112.9 MB in the end (delta: 25.1 MB). Peak memory consumption was 444.0 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:03,956 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 145.8 MB. Free memory is still 120.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 674.37 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 99.2 MB in the beginning and 162.0 MB in the end (delta: -62.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 74.59 ms. Allocated memory is still 202.9 MB. Free memory was 162.0 MB in the beginning and 160.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.42 ms. Allocated memory is still 202.9 MB. Free memory was 160.1 MB in the beginning and 158.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 459.59 ms. Allocated memory is still 202.9 MB. Free memory was 158.2 MB in the beginning and 138.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 280385.11 ms. Allocated memory was 202.9 MB in the beginning and 621.8 MB in the end (delta: 418.9 MB). Free memory was 138.0 MB in the beginning and 112.9 MB in the end (delta: 25.1 MB). Peak memory consumption was 444.0 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 (4099states) and FLOYD_HOARE automaton (currently 47 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (4701 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: 280.2s, OverallIterations: 18, TraceHistogramMax: 4, AutomataDifference: 255.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 2352 SDtfs, 15579 SDslu, 25696 SDs, 0 SdLazy, 4585 SolverSat, 1162 SolverUnsat, 186 SolverUnknown, 0 SolverNotchecked, 156.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1407 GetRequests, 586 SyntacticMatches, 9 SemanticMatches, 812 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13099 ImplicationChecksByTransitivity, 113.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4099occurred 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: 1.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 38756 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 18.3s InterpolantComputationTime, 1439 NumberOfCodeBlocks, 1439 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 1407 ConstructedInterpolants, 21 QuantifiedInterpolants, 714086 SizeOfPredicates, 56 NumberOfNonLiveVariables, 1548 ConjunctsInSsa, 172 ConjunctsInUnsatCore, 32 InterpolantComputations, 4 PerfectInterpolantSequences, 0/362 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