/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/stack_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 14:30:26,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 14:30:26,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 14:30:26,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 14:30:26,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 14:30:26,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 14:30:26,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 14:30:26,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 14:30:26,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 14:30:26,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 14:30:26,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 14:30:26,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 14:30:26,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 14:30:26,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 14:30:26,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 14:30:26,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 14:30:26,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 14:30:26,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 14:30:26,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 14:30:26,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 14:30:26,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 14:30:26,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 14:30:26,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 14:30:26,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 14:30:26,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 14:30:26,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 14:30:26,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 14:30:26,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 14:30:26,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 14:30:26,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 14:30:26,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 14:30:26,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 14:30:26,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 14:30:26,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 14:30:26,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 14:30:26,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 14:30:26,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 14:30:26,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 14:30:26,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 14:30:26,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 14:30:26,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 14:30:26,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-04-17 14:30:26,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 14:30:26,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 14:30:26,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 14:30:26,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 14:30:26,605 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 14:30:26,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 14:30:26,605 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 14:30:26,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 14:30:26,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 14:30:26,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 14:30:26,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 14:30:26,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 14:30:26,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 14:30:26,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 14:30:26,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 14:30:26,607 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 14:30:26,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 14:30:26,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 14:30:26,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 14:30:26,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 14:30:26,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 14:30:26,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 14:30:26,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 14:30:26,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 14:30:26,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 14:30:26,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 14:30:26,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 14:30:26,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 14:30:26,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-04-17 14:30:26,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 14:30:26,912 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 14:30:26,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 14:30:26,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 14:30:26,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 14:30:26,928 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 14:30:26,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2020-04-17 14:30:27,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b441c22/4fb960f826644b7a96a4a6433b7b589a/FLAG6f9ed1286 [2020-04-17 14:30:27,599 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 14:30:27,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2020-04-17 14:30:27,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b441c22/4fb960f826644b7a96a4a6433b7b589a/FLAG6f9ed1286 [2020-04-17 14:30:27,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b441c22/4fb960f826644b7a96a4a6433b7b589a [2020-04-17 14:30:27,867 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 14:30:27,892 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 14:30:27,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 14:30:27,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 14:30:27,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 14:30:27,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 02:30:27" (1/1) ... [2020-04-17 14:30:27,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a768f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:27, skipping insertion in model container [2020-04-17 14:30:27,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 02:30:27" (1/1) ... [2020-04-17 14:30:27,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 14:30:27,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 14:30:28,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 14:30:28,597 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 14:30:28,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 14:30:28,825 INFO L208 MainTranslator]: Completed translation [2020-04-17 14:30:28,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28 WrapperNode [2020-04-17 14:30:28,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 14:30:28,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 14:30:28,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 14:30:28,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 14:30:28,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... [2020-04-17 14:30:28,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... [2020-04-17 14:30:28,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 14:30:28,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 14:30:28,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 14:30:28,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 14:30:28,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... [2020-04-17 14:30:28,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... [2020-04-17 14:30:28,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... [2020-04-17 14:30:28,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... [2020-04-17 14:30:28,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... [2020-04-17 14:30:28,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... [2020-04-17 14:30:28,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... [2020-04-17 14:30:28,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 14:30:28,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 14:30:28,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 14:30:28,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 14:30:28,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 14:30:29,033 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 14:30:29,033 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 14:30:29,033 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 14:30:29,034 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 14:30:29,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 14:30:29,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 14:30:29,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-17 14:30:29,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 14:30:29,036 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-04-17 14:30:29,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-04-17 14:30:29,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 14:30:29,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 14:30:29,039 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 14:30:29,613 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 14:30:29,614 INFO L295 CfgBuilder]: Removed 24 assume(true) statements. [2020-04-17 14:30:29,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 02:30:29 BoogieIcfgContainer [2020-04-17 14:30:29,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 14:30:29,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 14:30:29,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 14:30:29,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 14:30:29,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 02:30:27" (1/3) ... [2020-04-17 14:30:29,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa8a7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 02:30:29, skipping insertion in model container [2020-04-17 14:30:29,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:28" (2/3) ... [2020-04-17 14:30:29,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa8a7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 02:30:29, skipping insertion in model container [2020-04-17 14:30:29,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 02:30:29" (3/3) ... [2020-04-17 14:30:29,632 INFO L109 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2020-04-17 14:30:29,643 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 14:30:29,644 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 14:30:29,652 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-04-17 14:30:29,653 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 14:30:29,698 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,699 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,699 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,699 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,700 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,700 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,700 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,700 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,700 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,701 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,701 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,701 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,701 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,701 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,702 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,702 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,702 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,702 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,702 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,702 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,703 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,703 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,703 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,703 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,703 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,703 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,703 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,704 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,704 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,704 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,704 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,705 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,705 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,705 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,705 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,705 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,706 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,706 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,706 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,707 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,707 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,707 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,707 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,708 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,708 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,708 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,708 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,708 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,709 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,709 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,709 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,710 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,710 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,710 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,710 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,710 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,711 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,711 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,711 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,712 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,712 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,712 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,712 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,713 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,713 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,713 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,714 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,714 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,715 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,715 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,715 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,716 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,716 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,716 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,716 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,717 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,717 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,717 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,717 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,718 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,718 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,718 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,719 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,719 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,719 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,719 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,720 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,720 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,720 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,720 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,720 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,721 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,721 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,721 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,721 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,721 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,722 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,722 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,722 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,737 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,738 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,738 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,738 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,738 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,738 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,739 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,739 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,739 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,739 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,740 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,740 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,740 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,740 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,741 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,741 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,741 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,741 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,741 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,741 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,742 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,742 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,742 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,742 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,746 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,746 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,746 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,747 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,747 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,747 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,747 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,747 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,748 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,748 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,748 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,748 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,748 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,749 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,749 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,749 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,749 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,749 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,749 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,750 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,750 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,750 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,750 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,756 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,756 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,756 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,756 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,757 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,757 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,757 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,757 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,757 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,758 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,758 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,758 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,758 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,758 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,759 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,759 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,759 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,759 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:29,780 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-04-17 14:30:29,800 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 14:30:29,801 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 14:30:29,801 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 14:30:29,801 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 14:30:29,801 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 14:30:29,801 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 14:30:29,801 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 14:30:29,802 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 14:30:29,819 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 138 transitions, 298 flow [2020-04-17 14:30:29,821 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 133 places, 138 transitions, 298 flow [2020-04-17 14:30:29,887 INFO L129 PetriNetUnfolder]: 11/138 cut-off events. [2020-04-17 14:30:29,888 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-04-17 14:30:29,897 INFO L80 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 138 events. 11/138 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 342 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2020-04-17 14:30:29,904 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 133 places, 138 transitions, 298 flow [2020-04-17 14:30:29,940 INFO L129 PetriNetUnfolder]: 11/138 cut-off events. [2020-04-17 14:30:29,940 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-04-17 14:30:29,943 INFO L80 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 138 events. 11/138 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 342 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2020-04-17 14:30:29,948 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 5744 [2020-04-17 14:30:29,949 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 14:30:33,195 WARN L192 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2020-04-17 14:30:33,387 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-04-17 14:30:33,542 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-04-17 14:30:33,825 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-04-17 14:30:34,042 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-04-17 14:30:34,054 INFO L206 etLargeBlockEncoding]: Checked pairs total: 7699 [2020-04-17 14:30:34,055 INFO L214 etLargeBlockEncoding]: Total number of compositions: 118 [2020-04-17 14:30:34,058 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 40 transitions, 102 flow [2020-04-17 14:30:34,082 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 331 states. [2020-04-17 14:30:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states. [2020-04-17 14:30:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 14:30:34,091 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:34,092 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 14:30:34,092 INFO L427 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:34,098 INFO L82 PathProgramCache]: Analyzing trace with hash -290275557, now seen corresponding path program 1 times [2020-04-17 14:30:34,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:34,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715877776] [2020-04-17 14:30:34,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:34,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715877776] [2020-04-17 14:30:34,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:34,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 14:30:34,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397658293] [2020-04-17 14:30:34,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 14:30:34,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 14:30:34,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 14:30:34,329 INFO L87 Difference]: Start difference. First operand 331 states. Second operand 3 states. [2020-04-17 14:30:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:34,411 INFO L93 Difference]: Finished difference Result 504 states and 1247 transitions. [2020-04-17 14:30:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 14:30:34,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-04-17 14:30:34,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:34,434 INFO L225 Difference]: With dead ends: 504 [2020-04-17 14:30:34,434 INFO L226 Difference]: Without dead ends: 460 [2020-04-17 14:30:34,435 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 14:30:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-04-17 14:30:34,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 420. [2020-04-17 14:30:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-04-17 14:30:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1095 transitions. [2020-04-17 14:30:34,551 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1095 transitions. Word has length 6 [2020-04-17 14:30:34,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:34,551 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 1095 transitions. [2020-04-17 14:30:34,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 14:30:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1095 transitions. [2020-04-17 14:30:34,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:30:34,553 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:34,557 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:34,558 INFO L427 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:34,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:34,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1518668221, now seen corresponding path program 1 times [2020-04-17 14:30:34,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:34,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462726661] [2020-04-17 14:30:34,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:34,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462726661] [2020-04-17 14:30:34,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:34,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 14:30:34,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471032514] [2020-04-17 14:30:34,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 14:30:34,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 14:30:34,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 14:30:34,701 INFO L87 Difference]: Start difference. First operand 420 states and 1095 transitions. Second operand 3 states. [2020-04-17 14:30:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:34,728 INFO L93 Difference]: Finished difference Result 464 states and 1205 transitions. [2020-04-17 14:30:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 14:30:34,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-04-17 14:30:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:34,732 INFO L225 Difference]: With dead ends: 464 [2020-04-17 14:30:34,732 INFO L226 Difference]: Without dead ends: 464 [2020-04-17 14:30:34,733 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 14:30:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-04-17 14:30:34,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2020-04-17 14:30:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-04-17 14:30:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1205 transitions. [2020-04-17 14:30:34,760 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1205 transitions. Word has length 10 [2020-04-17 14:30:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:34,760 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 1205 transitions. [2020-04-17 14:30:34,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 14:30:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1205 transitions. [2020-04-17 14:30:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:30:34,764 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:34,764 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:34,765 INFO L427 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash 542344755, now seen corresponding path program 1 times [2020-04-17 14:30:34,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:34,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116787841] [2020-04-17 14:30:34,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:34,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116787841] [2020-04-17 14:30:34,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43503922] [2020-04-17 14:30:34,881 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 [2020-04-17 14:30:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:34,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 14:30:34,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:35,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:35,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-04-17 14:30:35,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863079176] [2020-04-17 14:30:35,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 14:30:35,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:35,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 14:30:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-17 14:30:35,005 INFO L87 Difference]: Start difference. First operand 464 states and 1205 transitions. Second operand 7 states. [2020-04-17 14:30:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:35,120 INFO L93 Difference]: Finished difference Result 866 states and 2152 transitions. [2020-04-17 14:30:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:30:35,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-04-17 14:30:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:35,127 INFO L225 Difference]: With dead ends: 866 [2020-04-17 14:30:35,128 INFO L226 Difference]: Without dead ends: 851 [2020-04-17 14:30:35,128 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:30:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-04-17 14:30:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 575. [2020-04-17 14:30:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-04-17 14:30:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1484 transitions. [2020-04-17 14:30:35,154 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1484 transitions. Word has length 13 [2020-04-17 14:30:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:35,154 INFO L479 AbstractCegarLoop]: Abstraction has 575 states and 1484 transitions. [2020-04-17 14:30:35,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 14:30:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1484 transitions. [2020-04-17 14:30:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:30:35,157 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:35,157 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:35,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:35,361 INFO L427 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:35,362 INFO L82 PathProgramCache]: Analyzing trace with hash 843892794, now seen corresponding path program 1 times [2020-04-17 14:30:35,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:35,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548580785] [2020-04-17 14:30:35,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:35,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548580785] [2020-04-17 14:30:35,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:35,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 14:30:35,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230057703] [2020-04-17 14:30:35,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 14:30:35,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:35,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 14:30:35,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 14:30:35,442 INFO L87 Difference]: Start difference. First operand 575 states and 1484 transitions. Second operand 3 states. [2020-04-17 14:30:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:35,463 INFO L93 Difference]: Finished difference Result 304 states and 670 transitions. [2020-04-17 14:30:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 14:30:35,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-04-17 14:30:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:35,466 INFO L225 Difference]: With dead ends: 304 [2020-04-17 14:30:35,466 INFO L226 Difference]: Without dead ends: 304 [2020-04-17 14:30:35,467 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 14:30:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-04-17 14:30:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 294. [2020-04-17 14:30:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-04-17 14:30:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 643 transitions. [2020-04-17 14:30:35,476 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 643 transitions. Word has length 16 [2020-04-17 14:30:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:35,476 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 643 transitions. [2020-04-17 14:30:35,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 14:30:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 643 transitions. [2020-04-17 14:30:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:30:35,478 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:35,478 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:35,479 INFO L427 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash -960478475, now seen corresponding path program 1 times [2020-04-17 14:30:35,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:35,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511584999] [2020-04-17 14:30:35,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:35,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511584999] [2020-04-17 14:30:35,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:35,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 14:30:35,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13827166] [2020-04-17 14:30:35,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 14:30:35,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:35,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 14:30:35,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 14:30:35,530 INFO L87 Difference]: Start difference. First operand 294 states and 643 transitions. Second operand 3 states. [2020-04-17 14:30:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:35,567 INFO L93 Difference]: Finished difference Result 372 states and 811 transitions. [2020-04-17 14:30:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 14:30:35,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-04-17 14:30:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:35,571 INFO L225 Difference]: With dead ends: 372 [2020-04-17 14:30:35,571 INFO L226 Difference]: Without dead ends: 372 [2020-04-17 14:30:35,571 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 14:30:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-04-17 14:30:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 295. [2020-04-17 14:30:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-04-17 14:30:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2020-04-17 14:30:35,582 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 17 [2020-04-17 14:30:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:35,583 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2020-04-17 14:30:35,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 14:30:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2020-04-17 14:30:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:30:35,585 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:35,585 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-04-17 14:30:35,586 INFO L427 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1582230501, now seen corresponding path program 2 times [2020-04-17 14:30:35,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:35,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820166851] [2020-04-17 14:30:35,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:35,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820166851] [2020-04-17 14:30:35,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617226084] [2020-04-17 14:30:35,719 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:35,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:30:35,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:35,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 14:30:35,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:35,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:35,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-04-17 14:30:35,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643184706] [2020-04-17 14:30:35,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:30:35,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:30:35,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:30:35,893 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand 10 states. [2020-04-17 14:30:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:36,054 INFO L93 Difference]: Finished difference Result 542 states and 1156 transitions. [2020-04-17 14:30:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:30:36,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-04-17 14:30:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:36,058 INFO L225 Difference]: With dead ends: 542 [2020-04-17 14:30:36,059 INFO L226 Difference]: Without dead ends: 542 [2020-04-17 14:30:36,060 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:30:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-04-17 14:30:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 372. [2020-04-17 14:30:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-04-17 14:30:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 816 transitions. [2020-04-17 14:30:36,071 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 816 transitions. Word has length 20 [2020-04-17 14:30:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:36,072 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 816 transitions. [2020-04-17 14:30:36,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:30:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 816 transitions. [2020-04-17 14:30:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:30:36,073 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:36,073 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] [2020-04-17 14:30:36,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:36,286 INFO L427 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash 69417077, now seen corresponding path program 1 times [2020-04-17 14:30:36,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:36,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159828748] [2020-04-17 14:30:36,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:37,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159828748] [2020-04-17 14:30:37,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:37,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-04-17 14:30:37,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748047573] [2020-04-17 14:30:37,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:30:37,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:37,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:30:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:30:37,254 INFO L87 Difference]: Start difference. First operand 372 states and 816 transitions. Second operand 11 states. [2020-04-17 14:30:37,843 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-04-17 14:30:38,086 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-04-17 14:30:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:38,346 INFO L93 Difference]: Finished difference Result 632 states and 1366 transitions. [2020-04-17 14:30:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:30:38,347 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-04-17 14:30:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:38,351 INFO L225 Difference]: With dead ends: 632 [2020-04-17 14:30:38,352 INFO L226 Difference]: Without dead ends: 570 [2020-04-17 14:30:38,352 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:30:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-04-17 14:30:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 416. [2020-04-17 14:30:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-04-17 14:30:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 919 transitions. [2020-04-17 14:30:38,369 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 919 transitions. Word has length 21 [2020-04-17 14:30:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:38,369 INFO L479 AbstractCegarLoop]: Abstraction has 416 states and 919 transitions. [2020-04-17 14:30:38,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:30:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 919 transitions. [2020-04-17 14:30:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:30:38,371 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:38,371 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] [2020-04-17 14:30:38,371 INFO L427 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:38,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1329791031, now seen corresponding path program 2 times [2020-04-17 14:30:38,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:38,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180574847] [2020-04-17 14:30:38,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:38,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180574847] [2020-04-17 14:30:38,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:38,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-04-17 14:30:38,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811678234] [2020-04-17 14:30:38,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:30:38,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:38,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:30:38,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:30:38,690 INFO L87 Difference]: Start difference. First operand 416 states and 919 transitions. Second operand 11 states. [2020-04-17 14:30:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:39,126 INFO L93 Difference]: Finished difference Result 695 states and 1501 transitions. [2020-04-17 14:30:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:30:39,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-04-17 14:30:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:39,134 INFO L225 Difference]: With dead ends: 695 [2020-04-17 14:30:39,134 INFO L226 Difference]: Without dead ends: 634 [2020-04-17 14:30:39,134 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:30:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-04-17 14:30:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 416. [2020-04-17 14:30:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-04-17 14:30:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 916 transitions. [2020-04-17 14:30:39,147 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 916 transitions. Word has length 21 [2020-04-17 14:30:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:39,147 INFO L479 AbstractCegarLoop]: Abstraction has 416 states and 916 transitions. [2020-04-17 14:30:39,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:30:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 916 transitions. [2020-04-17 14:30:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:30:39,149 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:39,149 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:39,149 INFO L427 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:39,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:39,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2126692033, now seen corresponding path program 1 times [2020-04-17 14:30:39,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:39,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908746217] [2020-04-17 14:30:39,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:39,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908746217] [2020-04-17 14:30:39,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796604274] [2020-04-17 14:30:39,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:39,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 14:30:39,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 14:30:39,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 14:30:39,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-04-17 14:30:39,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877981495] [2020-04-17 14:30:39,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:30:39,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:39,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:30:39,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:30:39,316 INFO L87 Difference]: Start difference. First operand 416 states and 916 transitions. Second operand 6 states. [2020-04-17 14:30:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:39,393 INFO L93 Difference]: Finished difference Result 576 states and 1231 transitions. [2020-04-17 14:30:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 14:30:39,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-04-17 14:30:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:39,399 INFO L225 Difference]: With dead ends: 576 [2020-04-17 14:30:39,399 INFO L226 Difference]: Without dead ends: 566 [2020-04-17 14:30:39,399 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:30:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-04-17 14:30:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 476. [2020-04-17 14:30:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-04-17 14:30:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1042 transitions. [2020-04-17 14:30:39,412 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1042 transitions. Word has length 24 [2020-04-17 14:30:39,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:39,413 INFO L479 AbstractCegarLoop]: Abstraction has 476 states and 1042 transitions. [2020-04-17 14:30:39,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:30:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1042 transitions. [2020-04-17 14:30:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:30:39,415 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:39,415 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-04-17 14:30:39,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:39,618 INFO L427 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:39,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2004586803, now seen corresponding path program 3 times [2020-04-17 14:30:39,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:39,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542108455] [2020-04-17 14:30:39,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:39,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542108455] [2020-04-17 14:30:39,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649478245] [2020-04-17 14:30:39,726 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 [2020-04-17 14:30:39,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 14:30:39,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:39,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:30:39,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:39,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:39,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2020-04-17 14:30:39,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050112739] [2020-04-17 14:30:39,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:30:39,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:39,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:30:39,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:30:39,879 INFO L87 Difference]: Start difference. First operand 476 states and 1042 transitions. Second operand 13 states. [2020-04-17 14:30:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:40,104 INFO L93 Difference]: Finished difference Result 789 states and 1669 transitions. [2020-04-17 14:30:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:30:40,105 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-04-17 14:30:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:40,109 INFO L225 Difference]: With dead ends: 789 [2020-04-17 14:30:40,109 INFO L226 Difference]: Without dead ends: 789 [2020-04-17 14:30:40,109 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:30:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2020-04-17 14:30:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 553. [2020-04-17 14:30:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-04-17 14:30:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1211 transitions. [2020-04-17 14:30:40,124 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1211 transitions. Word has length 27 [2020-04-17 14:30:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:40,125 INFO L479 AbstractCegarLoop]: Abstraction has 553 states and 1211 transitions. [2020-04-17 14:30:40,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:30:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1211 transitions. [2020-04-17 14:30:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:30:40,126 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:40,126 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:40,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:40,330 INFO L427 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:40,331 INFO L82 PathProgramCache]: Analyzing trace with hash -408396195, now seen corresponding path program 3 times [2020-04-17 14:30:40,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:40,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361893694] [2020-04-17 14:30:40,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:41,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361893694] [2020-04-17 14:30:41,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780336173] [2020-04-17 14:30:41,076 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:41,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-04-17 14:30:41,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:41,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 50 conjunts are in the unsatisfiable core [2020-04-17 14:30:41,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:41,221 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:30:41,221 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 508 treesize of output 518 [2020-04-17 14:30:41,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,283 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:41,585 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 27 [2020-04-17 14:30:41,586 INFO L619 ElimStorePlain]: treesize reduction 8122, result has 0.4 percent of original size [2020-04-17 14:30:41,587 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:30:41,588 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:4 [2020-04-17 14:30:41,865 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-04-17 14:30:41,865 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:41,873 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:30:41,874 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:30:41,874 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-04-17 14:30:42,121 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-04-17 14:30:42,122 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:42,131 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:30:42,132 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 14:30:42,132 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-04-17 14:30:42,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:42,573 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 19 [2020-04-17 14:30:42,574 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:42,578 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2020-04-17 14:30:42,579 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:42,603 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 14:30:42,604 INFO L539 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:30:42,604 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:116, output treesize:11 [2020-04-17 14:30:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:30:42,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 14:30:42,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 28 [2020-04-17 14:30:42,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818821237] [2020-04-17 14:30:42,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:30:42,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:30:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:30:42,681 INFO L87 Difference]: Start difference. First operand 553 states and 1211 transitions. Second operand 15 states. [2020-04-17 14:30:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:46,595 INFO L93 Difference]: Finished difference Result 1207 states and 2573 transitions. [2020-04-17 14:30:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:30:46,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-04-17 14:30:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:46,600 INFO L225 Difference]: With dead ends: 1207 [2020-04-17 14:30:46,601 INFO L226 Difference]: Without dead ends: 1167 [2020-04-17 14:30:46,602 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:30:46,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2020-04-17 14:30:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 657. [2020-04-17 14:30:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-04-17 14:30:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1465 transitions. [2020-04-17 14:30:46,622 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1465 transitions. Word has length 28 [2020-04-17 14:30:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:46,623 INFO L479 AbstractCegarLoop]: Abstraction has 657 states and 1465 transitions. [2020-04-17 14:30:46,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:30:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1465 transitions. [2020-04-17 14:30:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-17 14:30:46,624 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:46,625 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:46,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:46,828 INFO L427 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:46,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1113124825, now seen corresponding path program 2 times [2020-04-17 14:30:46,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:46,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733295855] [2020-04-17 14:30:46,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 14:30:46,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733295855] [2020-04-17 14:30:46,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565041092] [2020-04-17 14:30:46,919 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:47,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:30:47,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:47,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:30:47,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 14:30:47,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:47,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-04-17 14:30:47,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826749471] [2020-04-17 14:30:47,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:30:47,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:30:47,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:30:47,063 INFO L87 Difference]: Start difference. First operand 657 states and 1465 transitions. Second operand 11 states. [2020-04-17 14:30:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:47,271 INFO L93 Difference]: Finished difference Result 1031 states and 2213 transitions. [2020-04-17 14:30:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:30:47,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-04-17 14:30:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:47,278 INFO L225 Difference]: With dead ends: 1031 [2020-04-17 14:30:47,279 INFO L226 Difference]: Without dead ends: 1031 [2020-04-17 14:30:47,279 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:30:47,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2020-04-17 14:30:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 701. [2020-04-17 14:30:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-04-17 14:30:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1589 transitions. [2020-04-17 14:30:47,304 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1589 transitions. Word has length 31 [2020-04-17 14:30:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:47,305 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1589 transitions. [2020-04-17 14:30:47,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:30:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1589 transitions. [2020-04-17 14:30:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-17 14:30:47,308 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:47,309 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-04-17 14:30:47,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:47,515 INFO L427 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:47,515 INFO L82 PathProgramCache]: Analyzing trace with hash 443984155, now seen corresponding path program 4 times [2020-04-17 14:30:47,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:47,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730243808] [2020-04-17 14:30:47,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:47,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730243808] [2020-04-17 14:30:47,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348741851] [2020-04-17 14:30:47,661 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:47,749 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:30:47,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:47,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:30:47,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:47,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:47,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2020-04-17 14:30:47,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786034932] [2020-04-17 14:30:47,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:30:47,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:47,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:30:47,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:30:47,773 INFO L87 Difference]: Start difference. First operand 701 states and 1589 transitions. Second operand 16 states. [2020-04-17 14:30:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:47,956 INFO L93 Difference]: Finished difference Result 1183 states and 2570 transitions. [2020-04-17 14:30:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:30:47,956 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-04-17 14:30:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:47,963 INFO L225 Difference]: With dead ends: 1183 [2020-04-17 14:30:47,963 INFO L226 Difference]: Without dead ends: 1183 [2020-04-17 14:30:47,963 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:30:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2020-04-17 14:30:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 792. [2020-04-17 14:30:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-04-17 14:30:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1797 transitions. [2020-04-17 14:30:48,012 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1797 transitions. Word has length 34 [2020-04-17 14:30:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:48,014 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1797 transitions. [2020-04-17 14:30:48,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:30:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1797 transitions. [2020-04-17 14:30:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-17 14:30:48,016 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:48,016 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:48,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:48,222 INFO L427 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:48,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1975916590, now seen corresponding path program 1 times [2020-04-17 14:30:48,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:48,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922632783] [2020-04-17 14:30:48,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:49,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922632783] [2020-04-17 14:30:49,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937699224] [2020-04-17 14:30:49,034 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2020-04-17 14:30:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:49,123 INFO L264 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 69 conjunts are in the unsatisfiable core [2020-04-17 14:30:49,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:49,147 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:30:49,148 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 611 treesize of output 585 [2020-04-17 14:30:49,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:49,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:49,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:49,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:49,153 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-04-17 14:30:49,383 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2020-04-17 14:30:49,384 INFO L619 ElimStorePlain]: treesize reduction 1379, result has 2.0 percent of original size [2020-04-17 14:30:49,385 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:30:49,385 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:8 [2020-04-17 14:30:49,553 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-04-17 14:30:49,553 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:49,562 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:30:49,563 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:30:49,564 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-04-17 14:30:49,787 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:30:49,788 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-04-17 14:30:49,788 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:49,804 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:30:49,805 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:30:49,805 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:43, output treesize:22 [2020-04-17 14:30:49,908 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-04-17 14:30:49,909 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:49,921 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:30:49,922 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 14:30:49,922 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:29 [2020-04-17 14:30:50,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:50,525 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2020-04-17 14:30:50,526 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:50,531 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2020-04-17 14:30:50,532 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 14:30:50,553 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 14:30:50,554 INFO L539 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:30:50,555 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:92, output treesize:11 [2020-04-17 14:30:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:30:50,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:50,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 42 [2020-04-17 14:30:50,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4794612] [2020-04-17 14:30:50,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-04-17 14:30:50,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-04-17 14:30:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:30:50,631 INFO L87 Difference]: Start difference. First operand 792 states and 1797 transitions. Second operand 44 states. [2020-04-17 14:30:53,458 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 39 [2020-04-17 14:30:53,674 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-04-17 14:31:00,396 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-04-17 14:31:01,829 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-04-17 14:31:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:02,821 INFO L93 Difference]: Finished difference Result 2752 states and 5825 transitions. [2020-04-17 14:31:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-04-17 14:31:02,821 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 36 [2020-04-17 14:31:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:02,832 INFO L225 Difference]: With dead ends: 2752 [2020-04-17 14:31:02,832 INFO L226 Difference]: Without dead ends: 2409 [2020-04-17 14:31:02,835 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1450, Invalid=12122, Unknown=0, NotChecked=0, Total=13572 [2020-04-17 14:31:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2020-04-17 14:31:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1121. [2020-04-17 14:31:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1121 states. [2020-04-17 14:31:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 2573 transitions. [2020-04-17 14:31:02,868 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 2573 transitions. Word has length 36 [2020-04-17 14:31:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:02,868 INFO L479 AbstractCegarLoop]: Abstraction has 1121 states and 2573 transitions. [2020-04-17 14:31:02,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-04-17 14:31:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 2573 transitions. [2020-04-17 14:31:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-17 14:31:02,870 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:02,871 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:03,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:03,079 INFO L427 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:03,080 INFO L82 PathProgramCache]: Analyzing trace with hash 460075742, now seen corresponding path program 2 times [2020-04-17 14:31:03,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:03,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871891290] [2020-04-17 14:31:03,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:04,292 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2020-04-17 14:31:04,484 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2020-04-17 14:31:04,800 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-04-17 14:31:05,025 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2020-04-17 14:31:05,271 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2020-04-17 14:31:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:05,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871891290] [2020-04-17 14:31:05,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076375406] [2020-04-17 14:31:05,401 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 [2020-04-17 14:31:05,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-17 14:31:05,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:05,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2020-04-17 14:31:05,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:05,594 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-04-17 14:31:05,594 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:05,599 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:05,600 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:05,600 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2020-04-17 14:31:06,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:06,280 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2020-04-17 14:31:06,281 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:06,289 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2020-04-17 14:31:06,290 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:06,314 INFO L619 ElimStorePlain]: treesize reduction 24, result has 31.4 percent of original size [2020-04-17 14:31:06,315 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:06,315 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:94, output treesize:11 [2020-04-17 14:31:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:31:06,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 14:31:06,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 25 [2020-04-17 14:31:06,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837229638] [2020-04-17 14:31:06,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:06,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:06,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:06,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:31:06,377 INFO L87 Difference]: Start difference. First operand 1121 states and 2573 transitions. Second operand 13 states. [2020-04-17 14:31:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:10,605 INFO L93 Difference]: Finished difference Result 1668 states and 3691 transitions. [2020-04-17 14:31:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:31:10,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-04-17 14:31:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:10,618 INFO L225 Difference]: With dead ends: 1668 [2020-04-17 14:31:10,618 INFO L226 Difference]: Without dead ends: 1628 [2020-04-17 14:31:10,623 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:31:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2020-04-17 14:31:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 917. [2020-04-17 14:31:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2020-04-17 14:31:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2051 transitions. [2020-04-17 14:31:10,655 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2051 transitions. Word has length 36 [2020-04-17 14:31:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:10,656 INFO L479 AbstractCegarLoop]: Abstraction has 917 states and 2051 transitions. [2020-04-17 14:31:10,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2051 transitions. [2020-04-17 14:31:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-17 14:31:10,661 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:10,661 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:10,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:10,865 INFO L427 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:10,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:10,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1085658049, now seen corresponding path program 3 times [2020-04-17 14:31:10,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:10,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196060657] [2020-04-17 14:31:10,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 14:31:11,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196060657] [2020-04-17 14:31:11,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406908187] [2020-04-17 14:31:11,009 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 [2020-04-17 14:31:11,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:31:11,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:11,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:11,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-04-17 14:31:11,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 14:31:11,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2020-04-17 14:31:11,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781082805] [2020-04-17 14:31:11,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:31:11,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:11,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:31:11,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:11,224 INFO L87 Difference]: Start difference. First operand 917 states and 2051 transitions. Second operand 6 states. [2020-04-17 14:31:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:11,343 INFO L93 Difference]: Finished difference Result 1255 states and 2714 transitions. [2020-04-17 14:31:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:31:11,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-04-17 14:31:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:11,350 INFO L225 Difference]: With dead ends: 1255 [2020-04-17 14:31:11,350 INFO L226 Difference]: Without dead ends: 1255 [2020-04-17 14:31:11,350 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:31:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2020-04-17 14:31:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 931. [2020-04-17 14:31:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 931 states. [2020-04-17 14:31:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2092 transitions. [2020-04-17 14:31:11,374 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2092 transitions. Word has length 38 [2020-04-17 14:31:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:11,374 INFO L479 AbstractCegarLoop]: Abstraction has 931 states and 2092 transitions. [2020-04-17 14:31:11,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:31:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2092 transitions. [2020-04-17 14:31:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-17 14:31:11,377 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:11,377 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:11,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:11,589 INFO L427 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash -448635967, now seen corresponding path program 4 times [2020-04-17 14:31:11,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:11,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003624507] [2020-04-17 14:31:11,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:31:11,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003624507] [2020-04-17 14:31:11,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763326122] [2020-04-17 14:31:11,712 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 [2020-04-17 14:31:11,818 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:11,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:11,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:11,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:31:11,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:11,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 11 [2020-04-17 14:31:11,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903201458] [2020-04-17 14:31:11,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:11,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:11,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:11,834 INFO L87 Difference]: Start difference. First operand 931 states and 2092 transitions. Second operand 12 states. [2020-04-17 14:31:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:12,000 INFO L93 Difference]: Finished difference Result 1292 states and 2793 transitions. [2020-04-17 14:31:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:31:12,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-04-17 14:31:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:12,008 INFO L225 Difference]: With dead ends: 1292 [2020-04-17 14:31:12,009 INFO L226 Difference]: Without dead ends: 1292 [2020-04-17 14:31:12,009 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2020-04-17 14:31:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 931. [2020-04-17 14:31:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 931 states. [2020-04-17 14:31:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2092 transitions. [2020-04-17 14:31:12,030 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2092 transitions. Word has length 38 [2020-04-17 14:31:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:12,031 INFO L479 AbstractCegarLoop]: Abstraction has 931 states and 2092 transitions. [2020-04-17 14:31:12,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:12,031 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2092 transitions. [2020-04-17 14:31:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 14:31:12,033 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:12,033 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2020-04-17 14:31:12,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:12,238 INFO L427 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1774953421, now seen corresponding path program 5 times [2020-04-17 14:31:12,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:12,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49042154] [2020-04-17 14:31:12,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49042154] [2020-04-17 14:31:12,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443804581] [2020-04-17 14:31:12,443 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 [2020-04-17 14:31:12,579 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:31:12,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:12,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:12,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:12,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2020-04-17 14:31:12,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534879692] [2020-04-17 14:31:12,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:31:12,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:12,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:31:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:31:12,614 INFO L87 Difference]: Start difference. First operand 931 states and 2092 transitions. Second operand 19 states. [2020-04-17 14:31:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:12,853 INFO L93 Difference]: Finished difference Result 1375 states and 2978 transitions. [2020-04-17 14:31:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:12,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-04-17 14:31:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:12,861 INFO L225 Difference]: With dead ends: 1375 [2020-04-17 14:31:12,862 INFO L226 Difference]: Without dead ends: 1375 [2020-04-17 14:31:12,862 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:31:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2020-04-17 14:31:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1008. [2020-04-17 14:31:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1008 states. [2020-04-17 14:31:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2261 transitions. [2020-04-17 14:31:12,893 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2261 transitions. Word has length 41 [2020-04-17 14:31:12,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:12,894 INFO L479 AbstractCegarLoop]: Abstraction has 1008 states and 2261 transitions. [2020-04-17 14:31:12,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:31:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2261 transitions. [2020-04-17 14:31:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-17 14:31:12,897 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:12,897 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:13,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:13,103 INFO L427 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:13,104 INFO L82 PathProgramCache]: Analyzing trace with hash 223818986, now seen corresponding path program 3 times [2020-04-17 14:31:13,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:13,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400306057] [2020-04-17 14:31:13,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:14,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400306057] [2020-04-17 14:31:14,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871399765] [2020-04-17 14:31:14,092 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:14,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:31:14,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:14,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 67 conjunts are in the unsatisfiable core [2020-04-17 14:31:14,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:14,240 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:14,240 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 149 [2020-04-17 14:31:14,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,264 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:14,508 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2020-04-17 14:31:14,509 INFO L619 ElimStorePlain]: treesize reduction 1125, result has 2.8 percent of original size [2020-04-17 14:31:14,510 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:31:14,510 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:4 [2020-04-17 14:31:14,687 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-04-17 14:31:14,687 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:14,694 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:14,695 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:14,696 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-04-17 14:31:15,033 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:31:15,034 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 14:31:15,034 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:15,054 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:15,055 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:15,055 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2020-04-17 14:31:15,214 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-04-17 14:31:15,214 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:15,225 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:15,226 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:15,226 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-04-17 14:31:15,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:15,999 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2020-04-17 14:31:16,000 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:16,003 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 19 [2020-04-17 14:31:16,004 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:16,025 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 14:31:16,026 INFO L539 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:16,026 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:116, output treesize:11 [2020-04-17 14:31:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:31:16,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:16,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 41 [2020-04-17 14:31:16,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361099001] [2020-04-17 14:31:16,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-04-17 14:31:16,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:16,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-17 14:31:16,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1700, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:31:16,134 INFO L87 Difference]: Start difference. First operand 1008 states and 2261 transitions. Second operand 43 states. [2020-04-17 14:31:16,434 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-04-17 14:31:16,990 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-04-17 14:31:17,362 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-04-17 14:31:17,590 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-04-17 14:31:17,927 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-04-17 14:31:18,198 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-04-17 14:31:18,789 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 70 [2020-04-17 14:31:18,998 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-04-17 14:31:19,429 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2020-04-17 14:31:19,751 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-04-17 14:31:20,037 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-04-17 14:31:20,307 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 66 [2020-04-17 14:31:20,684 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-04-17 14:31:20,948 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2020-04-17 14:31:21,483 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-04-17 14:31:21,782 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-04-17 14:31:22,174 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-04-17 14:31:22,717 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2020-04-17 14:31:22,972 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 64 [2020-04-17 14:31:23,377 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 70 [2020-04-17 14:31:23,681 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 [2020-04-17 14:31:23,932 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-04-17 14:31:24,569 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 76 [2020-04-17 14:31:24,853 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-04-17 14:31:25,216 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-04-17 14:31:25,538 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-04-17 14:31:25,843 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2020-04-17 14:31:26,311 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 76 [2020-04-17 14:31:27,364 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-04-17 14:31:27,720 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-04-17 14:31:27,969 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-04-17 14:31:28,545 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-04-17 14:31:28,868 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-04-17 14:31:29,106 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-04-17 14:31:29,665 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-04-17 14:31:29,943 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2020-04-17 14:31:30,186 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-04-17 14:31:30,801 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-04-17 14:31:31,196 WARN L192 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2020-04-17 14:31:31,421 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-04-17 14:31:31,760 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-04-17 14:31:32,160 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-04-17 14:31:32,578 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-04-17 14:31:33,000 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-04-17 14:31:33,315 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-04-17 14:31:34,166 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-04-17 14:31:34,765 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-04-17 14:31:35,048 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-04-17 14:31:35,644 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-04-17 14:31:35,964 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-04-17 14:31:38,509 WARN L192 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2020-04-17 14:31:38,790 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2020-04-17 14:31:39,017 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-04-17 14:31:39,520 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2020-04-17 14:31:39,810 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-04-17 14:31:40,091 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-04-17 14:31:40,538 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-04-17 14:31:40,864 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-04-17 14:31:41,504 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-04-17 14:31:44,388 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-04-17 14:31:45,520 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-04-17 14:31:47,867 WARN L192 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-04-17 14:31:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:47,938 INFO L93 Difference]: Finished difference Result 2640 states and 5618 transitions. [2020-04-17 14:31:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-04-17 14:31:47,939 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2020-04-17 14:31:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:47,953 INFO L225 Difference]: With dead ends: 2640 [2020-04-17 14:31:47,953 INFO L226 Difference]: Without dead ends: 2640 [2020-04-17 14:31:47,958 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5606 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=2708, Invalid=16752, Unknown=0, NotChecked=0, Total=19460 [2020-04-17 14:31:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2020-04-17 14:31:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1324. [2020-04-17 14:31:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2020-04-17 14:31:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3041 transitions. [2020-04-17 14:31:47,991 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3041 transitions. Word has length 43 [2020-04-17 14:31:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:47,992 INFO L479 AbstractCegarLoop]: Abstraction has 1324 states and 3041 transitions. [2020-04-17 14:31:47,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-04-17 14:31:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3041 transitions. [2020-04-17 14:31:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-17 14:31:47,994 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:47,995 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:48,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:48,199 INFO L427 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:48,199 INFO L82 PathProgramCache]: Analyzing trace with hash 141888205, now seen corresponding path program 5 times [2020-04-17 14:31:48,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:48,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129613718] [2020-04-17 14:31:48,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:31:48,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129613718] [2020-04-17 14:31:48,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601131293] [2020-04-17 14:31:48,327 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:48,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 14:31:48,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:48,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:48,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:31:48,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:48,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2020-04-17 14:31:48,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350181714] [2020-04-17 14:31:48,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:48,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:48,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:48,473 INFO L87 Difference]: Start difference. First operand 1324 states and 3041 transitions. Second operand 14 states. [2020-04-17 14:31:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:48,699 INFO L93 Difference]: Finished difference Result 1939 states and 4287 transitions. [2020-04-17 14:31:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:48,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-04-17 14:31:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:48,707 INFO L225 Difference]: With dead ends: 1939 [2020-04-17 14:31:48,707 INFO L226 Difference]: Without dead ends: 1939 [2020-04-17 14:31:48,708 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:31:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2020-04-17 14:31:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1324. [2020-04-17 14:31:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2020-04-17 14:31:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3041 transitions. [2020-04-17 14:31:48,736 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3041 transitions. Word has length 45 [2020-04-17 14:31:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:48,737 INFO L479 AbstractCegarLoop]: Abstraction has 1324 states and 3041 transitions. [2020-04-17 14:31:48,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3041 transitions. [2020-04-17 14:31:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-17 14:31:48,740 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:48,740 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:48,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:48,944 INFO L427 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:48,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1872502873, now seen corresponding path program 6 times [2020-04-17 14:31:48,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:48,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226852963] [2020-04-17 14:31:48,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:31:49,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226852963] [2020-04-17 14:31:49,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189415402] [2020-04-17 14:31:49,070 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:49,201 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:31:49,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:49,203 INFO L264 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:49,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:31:49,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:49,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2020-04-17 14:31:49,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798041424] [2020-04-17 14:31:49,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:49,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:49,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:49,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:49,236 INFO L87 Difference]: Start difference. First operand 1324 states and 3041 transitions. Second operand 14 states. [2020-04-17 14:31:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:49,463 INFO L93 Difference]: Finished difference Result 1999 states and 4441 transitions. [2020-04-17 14:31:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:49,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-04-17 14:31:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:49,469 INFO L225 Difference]: With dead ends: 1999 [2020-04-17 14:31:49,469 INFO L226 Difference]: Without dead ends: 1999 [2020-04-17 14:31:49,470 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:31:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2020-04-17 14:31:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1400. [2020-04-17 14:31:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2020-04-17 14:31:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 3257 transitions. [2020-04-17 14:31:49,501 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 3257 transitions. Word has length 45 [2020-04-17 14:31:49,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:49,502 INFO L479 AbstractCegarLoop]: Abstraction has 1400 states and 3257 transitions. [2020-04-17 14:31:49,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 3257 transitions. [2020-04-17 14:31:49,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-17 14:31:49,505 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:49,505 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:49,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:49,710 INFO L427 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1181218125, now seen corresponding path program 7 times [2020-04-17 14:31:49,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:49,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724948930] [2020-04-17 14:31:49,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:31:49,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724948930] [2020-04-17 14:31:49,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796359234] [2020-04-17 14:31:49,848 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:49,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:49,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:31:49,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:49,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 14 [2020-04-17 14:31:49,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897042934] [2020-04-17 14:31:49,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:49,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:49,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:49,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:49,958 INFO L87 Difference]: Start difference. First operand 1400 states and 3257 transitions. Second operand 15 states. [2020-04-17 14:31:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:50,144 INFO L93 Difference]: Finished difference Result 1874 states and 4243 transitions. [2020-04-17 14:31:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:50,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-04-17 14:31:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:50,149 INFO L225 Difference]: With dead ends: 1874 [2020-04-17 14:31:50,149 INFO L226 Difference]: Without dead ends: 1874 [2020-04-17 14:31:50,149 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:31:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-04-17 14:31:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1400. [2020-04-17 14:31:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2020-04-17 14:31:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 3257 transitions. [2020-04-17 14:31:50,175 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 3257 transitions. Word has length 45 [2020-04-17 14:31:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:50,175 INFO L479 AbstractCegarLoop]: Abstraction has 1400 states and 3257 transitions. [2020-04-17 14:31:50,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 3257 transitions. [2020-04-17 14:31:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-04-17 14:31:50,178 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:50,178 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2020-04-17 14:31:50,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:50,385 INFO L427 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:50,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:50,385 INFO L82 PathProgramCache]: Analyzing trace with hash 190021147, now seen corresponding path program 6 times [2020-04-17 14:31:50,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:50,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520005117] [2020-04-17 14:31:50,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:50,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520005117] [2020-04-17 14:31:50,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124489683] [2020-04-17 14:31:50,609 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:50,833 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:31:50,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:50,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:50,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:50,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:50,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 21 [2020-04-17 14:31:50,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248329822] [2020-04-17 14:31:50,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:31:50,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:31:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:31:50,866 INFO L87 Difference]: Start difference. First operand 1400 states and 3257 transitions. Second operand 22 states. [2020-04-17 14:31:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:51,101 INFO L93 Difference]: Finished difference Result 2162 states and 4820 transitions. [2020-04-17 14:31:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:51,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-04-17 14:31:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:51,107 INFO L225 Difference]: With dead ends: 2162 [2020-04-17 14:31:51,107 INFO L226 Difference]: Without dead ends: 2162 [2020-04-17 14:31:51,108 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2020-04-17 14:31:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1491. [2020-04-17 14:31:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2020-04-17 14:31:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3465 transitions. [2020-04-17 14:31:51,138 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3465 transitions. Word has length 48 [2020-04-17 14:31:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:51,138 INFO L479 AbstractCegarLoop]: Abstraction has 1491 states and 3465 transitions. [2020-04-17 14:31:51,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:31:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3465 transitions. [2020-04-17 14:31:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-04-17 14:31:51,142 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:51,142 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:51,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:51,346 INFO L427 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:51,347 INFO L82 PathProgramCache]: Analyzing trace with hash 6545759, now seen corresponding path program 4 times [2020-04-17 14:31:51,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:51,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980060555] [2020-04-17 14:31:51,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:53,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980060555] [2020-04-17 14:31:53,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263887356] [2020-04-17 14:31:53,008 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:53,102 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:53,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:53,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 97 conjunts are in the unsatisfiable core [2020-04-17 14:31:53,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:53,125 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:53,125 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 83 [2020-04-17 14:31:53,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:53,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:53,127 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2020-04-17 14:31:53,187 INFO L619 ElimStorePlain]: treesize reduction 167, result has 14.4 percent of original size [2020-04-17 14:31:53,188 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:31:53,188 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:8 [2020-04-17 14:31:53,359 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-04-17 14:31:53,360 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:53,370 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:53,370 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:53,371 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-04-17 14:31:53,663 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:31:53,664 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-04-17 14:31:53,665 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:53,740 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:53,740 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:53,741 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:43, output treesize:22 [2020-04-17 14:31:54,025 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:31:54,026 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-04-17 14:31:54,027 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:54,041 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:54,042 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:54,042 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:43, output treesize:22 [2020-04-17 14:31:54,191 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-04-17 14:31:54,191 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:54,202 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:31:54,202 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:54,203 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:29 [2020-04-17 14:31:54,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:54,889 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2020-04-17 14:31:54,890 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:54,896 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2020-04-17 14:31:54,896 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 14:31:54,917 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 14:31:54,917 INFO L539 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:31:54,918 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:92, output treesize:11 [2020-04-17 14:31:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:55,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:55,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 56 [2020-04-17 14:31:55,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770783089] [2020-04-17 14:31:55,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-04-17 14:31:55,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:55,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-04-17 14:31:55,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3033, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:31:55,031 INFO L87 Difference]: Start difference. First operand 1491 states and 3465 transitions. Second operand 58 states. [2020-04-17 14:31:58,469 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2020-04-17 14:32:01,568 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-04-17 14:32:02,405 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-04-17 14:32:06,958 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-04-17 14:32:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:14,114 INFO L93 Difference]: Finished difference Result 5985 states and 12961 transitions. [2020-04-17 14:32:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-04-17 14:32:14,114 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 51 [2020-04-17 14:32:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:14,127 INFO L225 Difference]: With dead ends: 5985 [2020-04-17 14:32:14,128 INFO L226 Difference]: Without dead ends: 5387 [2020-04-17 14:32:14,133 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7743 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=2676, Invalid=21816, Unknown=0, NotChecked=0, Total=24492 [2020-04-17 14:32:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5387 states. [2020-04-17 14:32:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5387 to 2112. [2020-04-17 14:32:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2112 states. [2020-04-17 14:32:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4864 transitions. [2020-04-17 14:32:14,204 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4864 transitions. Word has length 51 [2020-04-17 14:32:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:14,204 INFO L479 AbstractCegarLoop]: Abstraction has 2112 states and 4864 transitions. [2020-04-17 14:32:14,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-04-17 14:32:14,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4864 transitions. [2020-04-17 14:32:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-17 14:32:14,208 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:14,208 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:14,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:14,421 INFO L427 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1277101899, now seen corresponding path program 8 times [2020-04-17 14:32:14,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:14,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352462069] [2020-04-17 14:32:14,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:14,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352462069] [2020-04-17 14:32:14,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230778583] [2020-04-17 14:32:14,582 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:14,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:14,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:14,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:32:14,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:14,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:14,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 16 [2020-04-17 14:32:14,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344789781] [2020-04-17 14:32:14,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:14,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:14,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:14,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:14,711 INFO L87 Difference]: Start difference. First operand 2112 states and 4864 transitions. Second operand 17 states. [2020-04-17 14:32:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:14,997 INFO L93 Difference]: Finished difference Result 3000 states and 6636 transitions. [2020-04-17 14:32:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:32:14,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-04-17 14:32:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:15,005 INFO L225 Difference]: With dead ends: 3000 [2020-04-17 14:32:15,006 INFO L226 Difference]: Without dead ends: 3000 [2020-04-17 14:32:15,006 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:32:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2020-04-17 14:32:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2112. [2020-04-17 14:32:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2112 states. [2020-04-17 14:32:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4864 transitions. [2020-04-17 14:32:15,053 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4864 transitions. Word has length 52 [2020-04-17 14:32:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:15,054 INFO L479 AbstractCegarLoop]: Abstraction has 2112 states and 4864 transitions. [2020-04-17 14:32:15,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:15,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4864 transitions. [2020-04-17 14:32:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-17 14:32:15,057 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:15,058 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:15,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:15,270 INFO L427 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:15,271 INFO L82 PathProgramCache]: Analyzing trace with hash 453512769, now seen corresponding path program 9 times [2020-04-17 14:32:15,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:15,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37094019] [2020-04-17 14:32:15,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:15,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37094019] [2020-04-17 14:32:15,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625698750] [2020-04-17 14:32:15,418 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:15,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:32:15,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:15,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:32:15,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:15,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:15,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 16 [2020-04-17 14:32:15,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945602043] [2020-04-17 14:32:15,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:15,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:15,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:15,656 INFO L87 Difference]: Start difference. First operand 2112 states and 4864 transitions. Second operand 17 states. [2020-04-17 14:32:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:15,928 INFO L93 Difference]: Finished difference Result 3242 states and 7181 transitions. [2020-04-17 14:32:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:32:15,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-04-17 14:32:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:15,933 INFO L225 Difference]: With dead ends: 3242 [2020-04-17 14:32:15,933 INFO L226 Difference]: Without dead ends: 3242 [2020-04-17 14:32:15,934 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:32:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2020-04-17 14:32:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2050. [2020-04-17 14:32:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2050 states. [2020-04-17 14:32:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 4739 transitions. [2020-04-17 14:32:15,974 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 4739 transitions. Word has length 52 [2020-04-17 14:32:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:15,974 INFO L479 AbstractCegarLoop]: Abstraction has 2050 states and 4739 transitions. [2020-04-17 14:32:15,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 4739 transitions. [2020-04-17 14:32:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-17 14:32:15,978 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:15,978 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:16,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:16,183 INFO L427 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash -237771979, now seen corresponding path program 10 times [2020-04-17 14:32:16,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:16,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866570318] [2020-04-17 14:32:16,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:16,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866570318] [2020-04-17 14:32:16,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111370234] [2020-04-17 14:32:16,324 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:16,428 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:16,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:16,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:32:16,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:16,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:16,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 16 [2020-04-17 14:32:16,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894955235] [2020-04-17 14:32:16,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:16,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:16,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:16,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:16,457 INFO L87 Difference]: Start difference. First operand 2050 states and 4739 transitions. Second operand 17 states. [2020-04-17 14:32:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:16,687 INFO L93 Difference]: Finished difference Result 3186 states and 7103 transitions. [2020-04-17 14:32:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:32:16,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-04-17 14:32:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:16,693 INFO L225 Difference]: With dead ends: 3186 [2020-04-17 14:32:16,693 INFO L226 Difference]: Without dead ends: 3186 [2020-04-17 14:32:16,693 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:32:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2020-04-17 14:32:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2202. [2020-04-17 14:32:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2202 states. [2020-04-17 14:32:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 5117 transitions. [2020-04-17 14:32:16,737 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 5117 transitions. Word has length 52 [2020-04-17 14:32:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:16,738 INFO L479 AbstractCegarLoop]: Abstraction has 2202 states and 5117 transitions. [2020-04-17 14:32:16,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 5117 transitions. [2020-04-17 14:32:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-17 14:32:16,742 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:16,743 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:16,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:16,947 INFO L427 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1819300801, now seen corresponding path program 11 times [2020-04-17 14:32:16,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:16,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213808446] [2020-04-17 14:32:16,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:32:17,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213808446] [2020-04-17 14:32:17,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135921004] [2020-04-17 14:32:17,148 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:17,278 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:32:17,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:17,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:32:17,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:17,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:17,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 17 [2020-04-17 14:32:17,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004077532] [2020-04-17 14:32:17,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:17,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:17,286 INFO L87 Difference]: Start difference. First operand 2202 states and 5117 transitions. Second operand 18 states. [2020-04-17 14:32:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:17,541 INFO L93 Difference]: Finished difference Result 2909 states and 6592 transitions. [2020-04-17 14:32:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:32:17,541 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-04-17 14:32:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:17,547 INFO L225 Difference]: With dead ends: 2909 [2020-04-17 14:32:17,547 INFO L226 Difference]: Without dead ends: 2909 [2020-04-17 14:32:17,548 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:32:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2020-04-17 14:32:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2230. [2020-04-17 14:32:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2230 states. [2020-04-17 14:32:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 5195 transitions. [2020-04-17 14:32:17,587 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 5195 transitions. Word has length 52 [2020-04-17 14:32:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:17,588 INFO L479 AbstractCegarLoop]: Abstraction has 2230 states and 5195 transitions. [2020-04-17 14:32:17,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 5195 transitions. [2020-04-17 14:32:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-04-17 14:32:17,591 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:17,591 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:17,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:17,795 INFO L427 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:17,796 INFO L82 PathProgramCache]: Analyzing trace with hash 450553346, now seen corresponding path program 12 times [2020-04-17 14:32:17,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:17,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471562777] [2020-04-17 14:32:17,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 14:32:17,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471562777] [2020-04-17 14:32:17,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93365898] [2020-04-17 14:32:17,934 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:18,103 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:32:18,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:18,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:32:18,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:32:18,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:18,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 12 [2020-04-17 14:32:18,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199851582] [2020-04-17 14:32:18,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:32:18,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:32:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:32:18,114 INFO L87 Difference]: Start difference. First operand 2230 states and 5195 transitions. Second operand 13 states. [2020-04-17 14:32:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:18,292 INFO L93 Difference]: Finished difference Result 3269 states and 7372 transitions. [2020-04-17 14:32:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:32:18,292 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-04-17 14:32:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:18,297 INFO L225 Difference]: With dead ends: 3269 [2020-04-17 14:32:18,298 INFO L226 Difference]: Without dead ends: 3179 [2020-04-17 14:32:18,298 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2020-04-17 14:32:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 2374. [2020-04-17 14:32:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-04-17 14:32:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 5533 transitions. [2020-04-17 14:32:18,345 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 5533 transitions. Word has length 53 [2020-04-17 14:32:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:18,345 INFO L479 AbstractCegarLoop]: Abstraction has 2374 states and 5533 transitions. [2020-04-17 14:32:18,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:32:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 5533 transitions. [2020-04-17 14:32:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-04-17 14:32:18,349 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:18,349 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2020-04-17 14:32:18,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:18,554 INFO L427 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1876039885, now seen corresponding path program 7 times [2020-04-17 14:32:18,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:18,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87486350] [2020-04-17 14:32:18,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87486350] [2020-04-17 14:32:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429464839] [2020-04-17 14:32:18,804 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:18,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:32:18,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:18,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:18,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 24 [2020-04-17 14:32:18,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256362479] [2020-04-17 14:32:18,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:32:18,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:18,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:32:18,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:32:18,978 INFO L87 Difference]: Start difference. First operand 2374 states and 5533 transitions. Second operand 25 states. [2020-04-17 14:32:19,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:19,357 INFO L93 Difference]: Finished difference Result 3239 states and 7288 transitions. [2020-04-17 14:32:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:32:19,357 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-04-17 14:32:19,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:19,361 INFO L225 Difference]: With dead ends: 3239 [2020-04-17 14:32:19,361 INFO L226 Difference]: Without dead ends: 3239 [2020-04-17 14:32:19,362 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 14:32:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2020-04-17 14:32:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2465. [2020-04-17 14:32:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-04-17 14:32:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 5741 transitions. [2020-04-17 14:32:19,403 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 5741 transitions. Word has length 55 [2020-04-17 14:32:19,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:19,403 INFO L479 AbstractCegarLoop]: Abstraction has 2465 states and 5741 transitions. [2020-04-17 14:32:19,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:32:19,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 5741 transitions. [2020-04-17 14:32:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-04-17 14:32:19,407 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:19,408 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:19,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:19,612 INFO L427 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:19,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:19,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1158660423, now seen corresponding path program 5 times [2020-04-17 14:32:19,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:19,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854752920] [2020-04-17 14:32:19,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:32:20,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854752920] [2020-04-17 14:32:20,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959156564] [2020-04-17 14:32:20,806 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:20,937 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 14:32:20,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:20,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 92 conjunts are in the unsatisfiable core [2020-04-17 14:32:20,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:20,959 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:32:20,960 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 182 [2020-04-17 14:32:20,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,995 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:32:21,252 WARN L192 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 25 [2020-04-17 14:32:21,253 INFO L619 ElimStorePlain]: treesize reduction 2185, result has 1.5 percent of original size [2020-04-17 14:32:21,253 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:32:21,254 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:4 [2020-04-17 14:32:21,409 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-04-17 14:32:21,409 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:32:21,419 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:32:21,419 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:32:21,420 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-04-17 14:32:21,759 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:32:21,761 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 14:32:21,762 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:32:21,774 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:32:21,775 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:32:21,775 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2020-04-17 14:32:22,060 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:32:22,060 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 14:32:22,061 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:32:22,076 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:32:22,076 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:32:22,077 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2020-04-17 14:32:22,238 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-04-17 14:32:22,239 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:32:22,248 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:32:22,249 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 14:32:22,249 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-04-17 14:32:22,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:23,026 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 19 [2020-04-17 14:32:23,026 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:32:23,029 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2020-04-17 14:32:23,030 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 14:32:23,049 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 14:32:23,049 INFO L539 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:32:23,050 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:116, output treesize:11 [2020-04-17 14:32:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:32:23,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:23,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 53 [2020-04-17 14:32:23,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89054400] [2020-04-17 14:32:23,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-04-17 14:32:23,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:23,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-04-17 14:32:23,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2788, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:32:23,158 INFO L87 Difference]: Start difference. First operand 2465 states and 5741 transitions. Second operand 55 states. [2020-04-17 14:32:23,442 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-04-17 14:32:24,404 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-04-17 14:32:24,662 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-04-17 14:32:25,013 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-04-17 14:32:25,275 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-04-17 14:32:25,919 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-04-17 14:32:26,539 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-04-17 14:32:26,878 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-04-17 14:32:27,473 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2020-04-17 14:32:27,823 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-04-17 14:32:28,116 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2020-04-17 14:32:28,922 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-04-17 14:32:29,236 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-04-17 14:32:29,757 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-04-17 14:32:30,016 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-04-17 14:32:30,327 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2020-04-17 14:32:30,741 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 78 [2020-04-17 14:32:31,096 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-04-17 14:32:31,451 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2020-04-17 14:32:31,819 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2020-04-17 14:32:32,246 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-04-17 14:32:32,603 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-04-17 14:32:33,020 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2020-04-17 14:32:33,961 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 67 [2020-04-17 14:32:34,369 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 72 [2020-04-17 14:32:36,704 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 72 [2020-04-17 14:32:37,131 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-04-17 14:32:37,546 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 82 [2020-04-17 14:32:37,873 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-04-17 14:32:38,299 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-04-17 14:32:38,618 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-04-17 14:32:38,942 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-04-17 14:32:39,174 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-04-17 14:32:39,421 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-04-17 14:32:43,009 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-04-17 14:32:43,242 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-04-17 14:32:43,507 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-04-17 14:32:43,946 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-04-17 14:32:50,334 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-04-17 14:32:50,659 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-04-17 14:32:51,924 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-04-17 14:32:52,119 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-04-17 14:32:52,400 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-04-17 14:32:52,650 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-04-17 14:32:52,860 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-04-17 14:32:53,117 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-04-17 14:32:53,664 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-04-17 14:32:54,024 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-04-17 14:32:54,583 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-04-17 14:32:54,851 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-04-17 14:32:55,125 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-04-17 14:32:55,642 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-04-17 14:32:55,962 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-04-17 14:32:56,270 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-04-17 14:32:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:56,350 INFO L93 Difference]: Finished difference Result 8658 states and 19087 transitions. [2020-04-17 14:32:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-04-17 14:32:56,350 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 58 [2020-04-17 14:32:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:56,361 INFO L225 Difference]: With dead ends: 8658 [2020-04-17 14:32:56,361 INFO L226 Difference]: Without dead ends: 8388 [2020-04-17 14:32:56,364 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7550 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=3934, Invalid=22471, Unknown=1, NotChecked=0, Total=26406 [2020-04-17 14:32:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2020-04-17 14:32:56,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 2117. [2020-04-17 14:32:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2117 states. [2020-04-17 14:32:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 4869 transitions. [2020-04-17 14:32:56,438 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 4869 transitions. Word has length 58 [2020-04-17 14:32:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:56,438 INFO L479 AbstractCegarLoop]: Abstraction has 2117 states and 4869 transitions. [2020-04-17 14:32:56,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-04-17 14:32:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 4869 transitions. [2020-04-17 14:32:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 14:32:56,443 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:56,443 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:56,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:56,648 INFO L427 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 78714317, now seen corresponding path program 13 times [2020-04-17 14:32:56,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:56,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267857261] [2020-04-17 14:32:56,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:56,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267857261] [2020-04-17 14:32:56,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935383030] [2020-04-17 14:32:56,816 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:56,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:32:56,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:56,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:56,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 19 [2020-04-17 14:32:56,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604740859] [2020-04-17 14:32:56,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:56,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:56,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:56,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:56,957 INFO L87 Difference]: Start difference. First operand 2117 states and 4869 transitions. Second operand 20 states. [2020-04-17 14:32:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:57,295 INFO L93 Difference]: Finished difference Result 3099 states and 6880 transitions. [2020-04-17 14:32:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:32:57,295 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-04-17 14:32:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:57,299 INFO L225 Difference]: With dead ends: 3099 [2020-04-17 14:32:57,299 INFO L226 Difference]: Without dead ends: 3099 [2020-04-17 14:32:57,299 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:32:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2020-04-17 14:32:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2117. [2020-04-17 14:32:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2117 states. [2020-04-17 14:32:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 4869 transitions. [2020-04-17 14:32:57,328 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 4869 transitions. Word has length 59 [2020-04-17 14:32:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:57,329 INFO L479 AbstractCegarLoop]: Abstraction has 2117 states and 4869 transitions. [2020-04-17 14:32:57,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 4869 transitions. [2020-04-17 14:32:57,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 14:32:57,332 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:57,332 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:57,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:57,536 INFO L427 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:57,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1809328985, now seen corresponding path program 14 times [2020-04-17 14:32:57,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:57,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025674039] [2020-04-17 14:32:57,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:57,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025674039] [2020-04-17 14:32:57,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438284869] [2020-04-17 14:32:57,717 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:57,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:57,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:57,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:32:57,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:57,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:57,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 19 [2020-04-17 14:32:57,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694191780] [2020-04-17 14:32:57,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:57,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:57,883 INFO L87 Difference]: Start difference. First operand 2117 states and 4869 transitions. Second operand 20 states. [2020-04-17 14:32:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:58,164 INFO L93 Difference]: Finished difference Result 3218 states and 7135 transitions. [2020-04-17 14:32:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:32:58,164 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-04-17 14:32:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:58,168 INFO L225 Difference]: With dead ends: 3218 [2020-04-17 14:32:58,168 INFO L226 Difference]: Without dead ends: 3218 [2020-04-17 14:32:58,171 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:32:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2020-04-17 14:32:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2117. [2020-04-17 14:32:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2117 states. [2020-04-17 14:32:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 4869 transitions. [2020-04-17 14:32:58,201 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 4869 transitions. Word has length 59 [2020-04-17 14:32:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:58,202 INFO L479 AbstractCegarLoop]: Abstraction has 2117 states and 4869 transitions. [2020-04-17 14:32:58,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 4869 transitions. [2020-04-17 14:32:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 14:32:58,205 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:58,205 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:58,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:58,406 INFO L427 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:58,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1118044237, now seen corresponding path program 15 times [2020-04-17 14:32:58,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:58,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532762862] [2020-04-17 14:32:58,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:58,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532762862] [2020-04-17 14:32:58,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027436977] [2020-04-17 14:32:58,606 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:58,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:58,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:58,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:32:58,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:58,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:58,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 19 [2020-04-17 14:32:58,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519558187] [2020-04-17 14:32:58,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:58,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:58,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:58,819 INFO L87 Difference]: Start difference. First operand 2117 states and 4869 transitions. Second operand 20 states. [2020-04-17 14:32:59,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:59,147 INFO L93 Difference]: Finished difference Result 3331 states and 7348 transitions. [2020-04-17 14:32:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:32:59,147 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-04-17 14:32:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:59,151 INFO L225 Difference]: With dead ends: 3331 [2020-04-17 14:32:59,151 INFO L226 Difference]: Without dead ends: 3331 [2020-04-17 14:32:59,151 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:32:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2020-04-17 14:32:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 2235. [2020-04-17 14:32:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2235 states. [2020-04-17 14:32:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 5202 transitions. [2020-04-17 14:32:59,177 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 5202 transitions. Word has length 59 [2020-04-17 14:32:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:59,178 INFO L479 AbstractCegarLoop]: Abstraction has 2235 states and 5202 transitions. [2020-04-17 14:32:59,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 5202 transitions. [2020-04-17 14:32:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 14:32:59,180 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:59,180 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:59,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:59,381 INFO L427 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:59,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:59,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1119850279, now seen corresponding path program 16 times [2020-04-17 14:32:59,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:59,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387338798] [2020-04-17 14:32:59,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:59,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387338798] [2020-04-17 14:32:59,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359696829] [2020-04-17 14:32:59,552 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:59,661 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:59,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:59,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:32:59,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:32:59,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:59,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 19 [2020-04-17 14:32:59,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387063446] [2020-04-17 14:32:59,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:59,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:59,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:59,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:59,704 INFO L87 Difference]: Start difference. First operand 2235 states and 5202 transitions. Second operand 20 states. [2020-04-17 14:32:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:59,984 INFO L93 Difference]: Finished difference Result 2995 states and 6730 transitions. [2020-04-17 14:32:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:32:59,984 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-04-17 14:32:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:59,987 INFO L225 Difference]: With dead ends: 2995 [2020-04-17 14:32:59,987 INFO L226 Difference]: Without dead ends: 2995 [2020-04-17 14:32:59,988 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:32:59,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2020-04-17 14:33:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2187. [2020-04-17 14:33:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-04-17 14:33:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 5106 transitions. [2020-04-17 14:33:00,014 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 5106 transitions. Word has length 59 [2020-04-17 14:33:00,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:00,014 INFO L479 AbstractCegarLoop]: Abstraction has 2187 states and 5106 transitions. [2020-04-17 14:33:00,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:33:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 5106 transitions. [2020-04-17 14:33:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 14:33:00,018 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:00,018 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:00,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:00,221 INFO L427 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1377137971, now seen corresponding path program 17 times [2020-04-17 14:33:00,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:00,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276811305] [2020-04-17 14:33:00,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:33:00,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276811305] [2020-04-17 14:33:00,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677325879] [2020-04-17 14:33:00,464 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:00,620 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:33:00,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:00,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:33:00,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:00,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:00,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 20 [2020-04-17 14:33:00,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467351465] [2020-04-17 14:33:00,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:00,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:00,632 INFO L87 Difference]: Start difference. First operand 2187 states and 5106 transitions. Second operand 21 states. [2020-04-17 14:33:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:00,930 INFO L93 Difference]: Finished difference Result 2893 states and 6531 transitions. [2020-04-17 14:33:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:33:00,931 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-04-17 14:33:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:00,934 INFO L225 Difference]: With dead ends: 2893 [2020-04-17 14:33:00,934 INFO L226 Difference]: Without dead ends: 2893 [2020-04-17 14:33:00,935 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:33:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2020-04-17 14:33:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2291. [2020-04-17 14:33:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2291 states. [2020-04-17 14:33:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 5352 transitions. [2020-04-17 14:33:00,960 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 5352 transitions. Word has length 59 [2020-04-17 14:33:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:00,960 INFO L479 AbstractCegarLoop]: Abstraction has 2291 states and 5352 transitions. [2020-04-17 14:33:00,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 5352 transitions. [2020-04-17 14:33:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-04-17 14:33:00,963 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:00,963 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:01,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:01,165 INFO L427 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:01,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1696570378, now seen corresponding path program 18 times [2020-04-17 14:33:01,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:01,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077817683] [2020-04-17 14:33:01,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 74 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:01,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077817683] [2020-04-17 14:33:01,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808642567] [2020-04-17 14:33:01,285 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:01,505 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 14:33:01,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:01,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:33:01,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 74 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:01,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:01,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2020-04-17 14:33:01,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763517758] [2020-04-17 14:33:01,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:33:01,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:33:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:33:01,532 INFO L87 Difference]: Start difference. First operand 2291 states and 5352 transitions. Second operand 15 states. [2020-04-17 14:33:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:01,775 INFO L93 Difference]: Finished difference Result 3456 states and 7732 transitions. [2020-04-17 14:33:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:33:01,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-04-17 14:33:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:01,780 INFO L225 Difference]: With dead ends: 3456 [2020-04-17 14:33:01,780 INFO L226 Difference]: Without dead ends: 3456 [2020-04-17 14:33:01,780 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2020-04-17 14:33:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 2483. [2020-04-17 14:33:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2483 states. [2020-04-17 14:33:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 5858 transitions. [2020-04-17 14:33:01,810 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 5858 transitions. Word has length 60 [2020-04-17 14:33:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:01,811 INFO L479 AbstractCegarLoop]: Abstraction has 2483 states and 5858 transitions. [2020-04-17 14:33:01,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:33:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 5858 transitions. [2020-04-17 14:33:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-04-17 14:33:01,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:01,815 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:02,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:02,020 INFO L427 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:02,020 INFO L82 PathProgramCache]: Analyzing trace with hash 65095030, now seen corresponding path program 19 times [2020-04-17 14:33:02,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:02,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954115561] [2020-04-17 14:33:02,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 14:33:02,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954115561] [2020-04-17 14:33:02,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709630922] [2020-04-17 14:33:02,165 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:02,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:33:02,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 74 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:02,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:02,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 15 [2020-04-17 14:33:02,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698817019] [2020-04-17 14:33:02,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:33:02,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:02,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:33:02,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:33:02,295 INFO L87 Difference]: Start difference. First operand 2483 states and 5858 transitions. Second operand 16 states. [2020-04-17 14:33:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:02,504 INFO L93 Difference]: Finished difference Result 3597 states and 8148 transitions. [2020-04-17 14:33:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:33:02,505 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-04-17 14:33:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:02,509 INFO L225 Difference]: With dead ends: 3597 [2020-04-17 14:33:02,509 INFO L226 Difference]: Without dead ends: 3597 [2020-04-17 14:33:02,509 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2020-04-17 14:33:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2517. [2020-04-17 14:33:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2517 states. [2020-04-17 14:33:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 5907 transitions. [2020-04-17 14:33:02,547 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 5907 transitions. Word has length 60 [2020-04-17 14:33:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:02,547 INFO L479 AbstractCegarLoop]: Abstraction has 2517 states and 5907 transitions. [2020-04-17 14:33:02,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:33:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 5907 transitions. [2020-04-17 14:33:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-04-17 14:33:02,550 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:02,550 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:02,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:02,751 INFO L427 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:02,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1610343060, now seen corresponding path program 20 times [2020-04-17 14:33:02,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:02,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742676674] [2020-04-17 14:33:02,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 14:33:02,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742676674] [2020-04-17 14:33:02,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678340664] [2020-04-17 14:33:02,946 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:03,163 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:03,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:03,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:33:03,167 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 74 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:03,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:03,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 15 [2020-04-17 14:33:03,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17381844] [2020-04-17 14:33:03,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:33:03,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:03,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:33:03,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:33:03,183 INFO L87 Difference]: Start difference. First operand 2517 states and 5907 transitions. Second operand 16 states. [2020-04-17 14:33:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:03,434 INFO L93 Difference]: Finished difference Result 3219 states and 7280 transitions. [2020-04-17 14:33:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:33:03,434 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-04-17 14:33:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:03,439 INFO L225 Difference]: With dead ends: 3219 [2020-04-17 14:33:03,440 INFO L226 Difference]: Without dead ends: 3219 [2020-04-17 14:33:03,440 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2020-04-17 14:33:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 2489. [2020-04-17 14:33:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2489 states. [2020-04-17 14:33:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 5845 transitions. [2020-04-17 14:33:03,483 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 5845 transitions. Word has length 60 [2020-04-17 14:33:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:03,484 INFO L479 AbstractCegarLoop]: Abstraction has 2489 states and 5845 transitions. [2020-04-17 14:33:03,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:33:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 5845 transitions. [2020-04-17 14:33:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-04-17 14:33:03,488 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:03,488 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2020-04-17 14:33:03,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:03,692 INFO L427 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:03,693 INFO L82 PathProgramCache]: Analyzing trace with hash -627600613, now seen corresponding path program 8 times [2020-04-17 14:33:03,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:03,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917636964] [2020-04-17 14:33:03,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:04,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917636964] [2020-04-17 14:33:04,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375338461] [2020-04-17 14:33:04,034 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:04,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:04,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:04,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:04,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:04,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:04,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18] total 27 [2020-04-17 14:33:04,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332784012] [2020-04-17 14:33:04,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-17 14:33:04,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:04,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-17 14:33:04,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:33:04,199 INFO L87 Difference]: Start difference. First operand 2489 states and 5845 transitions. Second operand 28 states. [2020-04-17 14:33:04,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:04,574 INFO L93 Difference]: Finished difference Result 3156 states and 7171 transitions. [2020-04-17 14:33:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:33:04,575 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-04-17 14:33:04,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:04,580 INFO L225 Difference]: With dead ends: 3156 [2020-04-17 14:33:04,580 INFO L226 Difference]: Without dead ends: 3156 [2020-04-17 14:33:04,581 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:33:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2020-04-17 14:33:04,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2580. [2020-04-17 14:33:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2580 states. [2020-04-17 14:33:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 6053 transitions. [2020-04-17 14:33:04,612 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 6053 transitions. Word has length 62 [2020-04-17 14:33:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:04,612 INFO L479 AbstractCegarLoop]: Abstraction has 2580 states and 6053 transitions. [2020-04-17 14:33:04,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-17 14:33:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 6053 transitions. [2020-04-17 14:33:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 14:33:04,615 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:04,615 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:04,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:04,816 INFO L427 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1762823605, now seen corresponding path program 21 times [2020-04-17 14:33:04,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:04,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123547497] [2020-04-17 14:33:04,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:05,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123547497] [2020-04-17 14:33:05,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517357018] [2020-04-17 14:33:05,032 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:05,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:33:05,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:05,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:05,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:05,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:05,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 22 [2020-04-17 14:33:05,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383893647] [2020-04-17 14:33:05,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:05,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:05,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:05,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:05,310 INFO L87 Difference]: Start difference. First operand 2580 states and 6053 transitions. Second operand 23 states. [2020-04-17 14:33:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:05,681 INFO L93 Difference]: Finished difference Result 3772 states and 8556 transitions. [2020-04-17 14:33:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:33:05,682 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-04-17 14:33:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:05,687 INFO L225 Difference]: With dead ends: 3772 [2020-04-17 14:33:05,687 INFO L226 Difference]: Without dead ends: 3772 [2020-04-17 14:33:05,688 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:33:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2020-04-17 14:33:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 2566. [2020-04-17 14:33:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2566 states. [2020-04-17 14:33:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 6014 transitions. [2020-04-17 14:33:05,721 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 6014 transitions. Word has length 66 [2020-04-17 14:33:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:05,721 INFO L479 AbstractCegarLoop]: Abstraction has 2566 states and 6014 transitions. [2020-04-17 14:33:05,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 6014 transitions. [2020-04-17 14:33:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 14:33:05,724 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:05,725 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:05,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:05,925 INFO L427 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash -801529023, now seen corresponding path program 22 times [2020-04-17 14:33:05,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:05,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993475387] [2020-04-17 14:33:05,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:06,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993475387] [2020-04-17 14:33:06,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237334766] [2020-04-17 14:33:06,192 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:06,324 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:06,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:06,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:06,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:06,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:06,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 22 [2020-04-17 14:33:06,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742134890] [2020-04-17 14:33:06,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:06,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:06,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:06,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:06,385 INFO L87 Difference]: Start difference. First operand 2566 states and 6014 transitions. Second operand 23 states. [2020-04-17 14:33:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:06,821 INFO L93 Difference]: Finished difference Result 3835 states and 8616 transitions. [2020-04-17 14:33:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:33:06,822 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-04-17 14:33:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:06,827 INFO L225 Difference]: With dead ends: 3835 [2020-04-17 14:33:06,827 INFO L226 Difference]: Without dead ends: 3835 [2020-04-17 14:33:06,828 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:33:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2020-04-17 14:33:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 2566. [2020-04-17 14:33:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2566 states. [2020-04-17 14:33:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 6014 transitions. [2020-04-17 14:33:06,882 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 6014 transitions. Word has length 66 [2020-04-17 14:33:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:06,882 INFO L479 AbstractCegarLoop]: Abstraction has 2566 states and 6014 transitions. [2020-04-17 14:33:06,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 6014 transitions. [2020-04-17 14:33:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 14:33:06,888 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:06,888 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:07,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:07,094 INFO L427 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:07,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:07,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1492813771, now seen corresponding path program 23 times [2020-04-17 14:33:07,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:07,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019072960] [2020-04-17 14:33:07,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:07,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019072960] [2020-04-17 14:33:07,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291342143] [2020-04-17 14:33:07,326 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:07,613 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:33:07,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:07,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:07,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:07,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:07,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 22 [2020-04-17 14:33:07,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901250336] [2020-04-17 14:33:07,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:07,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:07,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:07,656 INFO L87 Difference]: Start difference. First operand 2566 states and 6014 transitions. Second operand 23 states. [2020-04-17 14:33:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:08,066 INFO L93 Difference]: Finished difference Result 3832 states and 8597 transitions. [2020-04-17 14:33:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:33:08,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-04-17 14:33:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:08,073 INFO L225 Difference]: With dead ends: 3832 [2020-04-17 14:33:08,073 INFO L226 Difference]: Without dead ends: 3832 [2020-04-17 14:33:08,074 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:33:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2020-04-17 14:33:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2684. [2020-04-17 14:33:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2684 states. [2020-04-17 14:33:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 6347 transitions. [2020-04-17 14:33:08,126 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 6347 transitions. Word has length 66 [2020-04-17 14:33:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:08,128 INFO L479 AbstractCegarLoop]: Abstraction has 2684 states and 6347 transitions. [2020-04-17 14:33:08,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 6347 transitions. [2020-04-17 14:33:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 14:33:08,133 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:08,133 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:08,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:08,339 INFO L427 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:08,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:08,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1236058300, now seen corresponding path program 6 times [2020-04-17 14:33:08,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:08,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713282915] [2020-04-17 14:33:08,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:10,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713282915] [2020-04-17 14:33:10,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777806249] [2020-04-17 14:33:10,467 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:10,641 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 14:33:10,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:10,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 126 conjunts are in the unsatisfiable core [2020-04-17 14:33:10,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:10,674 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:10,675 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 631 treesize of output 647 [2020-04-17 14:33:10,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:10,722 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:10,976 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 31 [2020-04-17 14:33:10,977 INFO L619 ElimStorePlain]: treesize reduction 2299, result has 1.7 percent of original size [2020-04-17 14:33:10,977 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:33:10,978 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:55, output treesize:11 [2020-04-17 14:33:10,995 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-17 14:33:10,996 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:11,006 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:11,007 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:33:11,007 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:25 [2020-04-17 14:33:11,129 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:33:11,130 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2020-04-17 14:33:11,131 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:11,146 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:11,147 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:33:11,147 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2020-04-17 14:33:11,319 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:33:11,320 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2020-04-17 14:33:11,321 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:11,338 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:11,339 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:33:11,339 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:25 [2020-04-17 14:33:11,522 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:33:11,523 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2020-04-17 14:33:11,523 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:11,542 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:11,543 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:33:11,543 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:25 [2020-04-17 14:33:11,630 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2020-04-17 14:33:11,631 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:11,644 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:11,645 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:11,645 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:32 [2020-04-17 14:33:12,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:12,408 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2020-04-17 14:33:12,408 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:12,412 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2020-04-17 14:33:12,413 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:12,438 INFO L619 ElimStorePlain]: treesize reduction 30, result has 34.8 percent of original size [2020-04-17 14:33:12,439 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:12,439 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:92, output treesize:12 [2020-04-17 14:33:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:12,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:12,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 31] total 62 [2020-04-17 14:33:12,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664273499] [2020-04-17 14:33:12,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-04-17 14:33:12,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:12,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-04-17 14:33:12,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=3513, Unknown=0, NotChecked=0, Total=4032 [2020-04-17 14:33:12,571 INFO L87 Difference]: Start difference. First operand 2684 states and 6347 transitions. Second operand 64 states. [2020-04-17 14:33:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:26,859 INFO L93 Difference]: Finished difference Result 10159 states and 22541 transitions. [2020-04-17 14:33:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-04-17 14:33:26,860 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 66 [2020-04-17 14:33:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:26,870 INFO L225 Difference]: With dead ends: 10159 [2020-04-17 14:33:26,871 INFO L226 Difference]: Without dead ends: 9281 [2020-04-17 14:33:26,872 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9818 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=3166, Invalid=23566, Unknown=0, NotChecked=0, Total=26732 [2020-04-17 14:33:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9281 states. [2020-04-17 14:33:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9281 to 3795. [2020-04-17 14:33:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3795 states. [2020-04-17 14:33:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 8877 transitions. [2020-04-17 14:33:26,952 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 8877 transitions. Word has length 66 [2020-04-17 14:33:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:26,952 INFO L479 AbstractCegarLoop]: Abstraction has 3795 states and 8877 transitions. [2020-04-17 14:33:26,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-04-17 14:33:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 8877 transitions. [2020-04-17 14:33:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 14:33:26,956 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:26,956 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:27,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:27,157 INFO L427 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash 564259009, now seen corresponding path program 24 times [2020-04-17 14:33:27,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:27,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681241763] [2020-04-17 14:33:27,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:27,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681241763] [2020-04-17 14:33:27,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398149035] [2020-04-17 14:33:27,421 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:27,631 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:33:27,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:27,634 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:27,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:27,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:27,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 22 [2020-04-17 14:33:27,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198805886] [2020-04-17 14:33:27,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:27,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:27,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:27,661 INFO L87 Difference]: Start difference. First operand 3795 states and 8877 transitions. Second operand 23 states. [2020-04-17 14:33:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:28,031 INFO L93 Difference]: Finished difference Result 5308 states and 11874 transitions. [2020-04-17 14:33:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:33:28,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-04-17 14:33:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:28,037 INFO L225 Difference]: With dead ends: 5308 [2020-04-17 14:33:28,037 INFO L226 Difference]: Without dead ends: 5308 [2020-04-17 14:33:28,037 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 14:33:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5308 states. [2020-04-17 14:33:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5308 to 3823. [2020-04-17 14:33:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3823 states. [2020-04-17 14:33:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 8951 transitions. [2020-04-17 14:33:28,155 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 8951 transitions. Word has length 66 [2020-04-17 14:33:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:28,155 INFO L479 AbstractCegarLoop]: Abstraction has 3823 states and 8951 transitions. [2020-04-17 14:33:28,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 8951 transitions. [2020-04-17 14:33:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 14:33:28,159 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:28,159 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:28,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:28,360 INFO L427 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:28,361 INFO L82 PathProgramCache]: Analyzing trace with hash 306971317, now seen corresponding path program 25 times [2020-04-17 14:33:28,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:28,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698971640] [2020-04-17 14:33:28,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:28,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698971640] [2020-04-17 14:33:28,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459263471] [2020-04-17 14:33:28,558 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:28,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:28,675 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:28,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:28,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 22 [2020-04-17 14:33:28,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746700808] [2020-04-17 14:33:28,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:28,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:28,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:28,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:28,705 INFO L87 Difference]: Start difference. First operand 3823 states and 8951 transitions. Second operand 23 states. [2020-04-17 14:33:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:29,032 INFO L93 Difference]: Finished difference Result 4803 states and 10930 transitions. [2020-04-17 14:33:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:33:29,033 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-04-17 14:33:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:29,038 INFO L225 Difference]: With dead ends: 4803 [2020-04-17 14:33:29,038 INFO L226 Difference]: Without dead ends: 4803 [2020-04-17 14:33:29,039 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:33:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2020-04-17 14:33:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3865. [2020-04-17 14:33:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3865 states. [2020-04-17 14:33:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 9064 transitions. [2020-04-17 14:33:29,081 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 9064 transitions. Word has length 66 [2020-04-17 14:33:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:29,082 INFO L479 AbstractCegarLoop]: Abstraction has 3865 states and 9064 transitions. [2020-04-17 14:33:29,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 9064 transitions. [2020-04-17 14:33:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 14:33:29,086 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:29,086 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:29,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:29,289 INFO L427 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash -295530943, now seen corresponding path program 26 times [2020-04-17 14:33:29,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:29,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315991512] [2020-04-17 14:33:29,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:33:29,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315991512] [2020-04-17 14:33:29,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988464680] [2020-04-17 14:33:29,546 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:29,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:29,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:29,668 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:29,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:29,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:29,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 23 [2020-04-17 14:33:29,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989904877] [2020-04-17 14:33:29,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:29,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:29,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:29,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:29,677 INFO L87 Difference]: Start difference. First operand 3865 states and 9064 transitions. Second operand 24 states. [2020-04-17 14:33:29,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:29,998 INFO L93 Difference]: Finished difference Result 4614 states and 10546 transitions. [2020-04-17 14:33:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:33:29,999 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-04-17 14:33:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:30,004 INFO L225 Difference]: With dead ends: 4614 [2020-04-17 14:33:30,004 INFO L226 Difference]: Without dead ends: 4614 [2020-04-17 14:33:30,005 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:33:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2020-04-17 14:33:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 3893. [2020-04-17 14:33:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3893 states. [2020-04-17 14:33:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 9140 transitions. [2020-04-17 14:33:30,049 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 9140 transitions. Word has length 66 [2020-04-17 14:33:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:30,049 INFO L479 AbstractCegarLoop]: Abstraction has 3893 states and 9140 transitions. [2020-04-17 14:33:30,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 9140 transitions. [2020-04-17 14:33:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-04-17 14:33:30,053 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:30,053 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:30,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:30,254 INFO L427 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:30,255 INFO L82 PathProgramCache]: Analyzing trace with hash -255652990, now seen corresponding path program 27 times [2020-04-17 14:33:30,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:30,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699619422] [2020-04-17 14:33:30,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:30,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699619422] [2020-04-17 14:33:30,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311964740] [2020-04-17 14:33:30,401 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:30,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:33:30,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:30,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:30,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:30,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:30,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2020-04-17 14:33:30,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013784311] [2020-04-17 14:33:30,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:33:30,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:30,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:33:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:33:30,695 INFO L87 Difference]: Start difference. First operand 3893 states and 9140 transitions. Second operand 18 states. [2020-04-17 14:33:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:31,135 INFO L93 Difference]: Finished difference Result 5703 states and 12874 transitions. [2020-04-17 14:33:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:33:31,135 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-04-17 14:33:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:31,145 INFO L225 Difference]: With dead ends: 5703 [2020-04-17 14:33:31,146 INFO L226 Difference]: Without dead ends: 5703 [2020-04-17 14:33:31,146 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:33:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2020-04-17 14:33:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 3993. [2020-04-17 14:33:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3993 states. [2020-04-17 14:33:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 9376 transitions. [2020-04-17 14:33:31,245 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 9376 transitions. Word has length 67 [2020-04-17 14:33:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:31,246 INFO L479 AbstractCegarLoop]: Abstraction has 3993 states and 9376 transitions. [2020-04-17 14:33:31,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:33:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 9376 transitions. [2020-04-17 14:33:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-04-17 14:33:31,260 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:31,260 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:31,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:31,468 INFO L427 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:31,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1506012418, now seen corresponding path program 28 times [2020-04-17 14:33:31,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:31,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497024247] [2020-04-17 14:33:31,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:31,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497024247] [2020-04-17 14:33:31,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779542264] [2020-04-17 14:33:31,681 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:31,797 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:31,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:31,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:31,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:31,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:31,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2020-04-17 14:33:31,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261103424] [2020-04-17 14:33:31,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:33:31,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:31,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:33:31,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:33:31,839 INFO L87 Difference]: Start difference. First operand 3993 states and 9376 transitions. Second operand 18 states. [2020-04-17 14:33:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:32,146 INFO L93 Difference]: Finished difference Result 6208 states and 14189 transitions. [2020-04-17 14:33:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:33:32,146 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-04-17 14:33:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:32,153 INFO L225 Difference]: With dead ends: 6208 [2020-04-17 14:33:32,153 INFO L226 Difference]: Without dead ends: 6208 [2020-04-17 14:33:32,154 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:33:32,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6208 states. [2020-04-17 14:33:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6208 to 4145. [2020-04-17 14:33:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4145 states. [2020-04-17 14:33:32,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 9706 transitions. [2020-04-17 14:33:32,216 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 9706 transitions. Word has length 67 [2020-04-17 14:33:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:32,216 INFO L479 AbstractCegarLoop]: Abstraction has 4145 states and 9706 transitions. [2020-04-17 14:33:32,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:33:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 9706 transitions. [2020-04-17 14:33:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-04-17 14:33:32,221 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:32,221 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:32,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:32,422 INFO L427 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:32,422 INFO L82 PathProgramCache]: Analyzing trace with hash -169425672, now seen corresponding path program 29 times [2020-04-17 14:33:32,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:32,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701447387] [2020-04-17 14:33:32,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:32,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701447387] [2020-04-17 14:33:32,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743751745] [2020-04-17 14:33:32,624 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:32,771 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:33:32,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:32,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:32,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:32,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:32,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2020-04-17 14:33:32,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401999992] [2020-04-17 14:33:32,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:33:32,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:32,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:33:32,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:33:32,798 INFO L87 Difference]: Start difference. First operand 4145 states and 9706 transitions. Second operand 18 states. [2020-04-17 14:33:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:33,077 INFO L93 Difference]: Finished difference Result 5915 states and 13310 transitions. [2020-04-17 14:33:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:33:33,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-04-17 14:33:33,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:33,085 INFO L225 Difference]: With dead ends: 5915 [2020-04-17 14:33:33,085 INFO L226 Difference]: Without dead ends: 5915 [2020-04-17 14:33:33,085 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:33:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2020-04-17 14:33:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 4557. [2020-04-17 14:33:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4557 states. [2020-04-17 14:33:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 10710 transitions. [2020-04-17 14:33:33,145 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 10710 transitions. Word has length 67 [2020-04-17 14:33:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:33,145 INFO L479 AbstractCegarLoop]: Abstraction has 4557 states and 10710 transitions. [2020-04-17 14:33:33,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:33:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 10710 transitions. [2020-04-17 14:33:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-04-17 14:33:33,148 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:33,149 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:33,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:33,349 INFO L427 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:33,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:33,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1446356094, now seen corresponding path program 30 times [2020-04-17 14:33:33,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:33,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645808589] [2020-04-17 14:33:33,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 14:33:33,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645808589] [2020-04-17 14:33:33,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126935285] [2020-04-17 14:33:33,527 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:33,846 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:33:33,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:33,849 INFO L264 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:33,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:33,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:33,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 18 [2020-04-17 14:33:33,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471739113] [2020-04-17 14:33:33,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:33:33,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:33,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:33:33,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:33:33,862 INFO L87 Difference]: Start difference. First operand 4557 states and 10710 transitions. Second operand 19 states. [2020-04-17 14:33:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:34,170 INFO L93 Difference]: Finished difference Result 6283 states and 14395 transitions. [2020-04-17 14:33:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:33:34,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-04-17 14:33:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:34,178 INFO L225 Difference]: With dead ends: 6283 [2020-04-17 14:33:34,179 INFO L226 Difference]: Without dead ends: 6283 [2020-04-17 14:33:34,179 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:33:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2020-04-17 14:33:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 4559. [2020-04-17 14:33:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4559 states. [2020-04-17 14:33:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 10699 transitions. [2020-04-17 14:33:34,272 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 10699 transitions. Word has length 67 [2020-04-17 14:33:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:34,273 INFO L479 AbstractCegarLoop]: Abstraction has 4559 states and 10699 transitions. [2020-04-17 14:33:34,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:33:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 10699 transitions. [2020-04-17 14:33:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-04-17 14:33:34,276 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:34,276 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:34,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:34,481 INFO L427 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1173173112, now seen corresponding path program 31 times [2020-04-17 14:33:34,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:34,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048211801] [2020-04-17 14:33:34,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 14:33:34,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048211801] [2020-04-17 14:33:34,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258867574] [2020-04-17 14:33:34,639 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:34,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:34,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:34,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:34,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 18 [2020-04-17 14:33:34,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686497089] [2020-04-17 14:33:34,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:33:34,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:34,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:33:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:33:34,766 INFO L87 Difference]: Start difference. First operand 4559 states and 10699 transitions. Second operand 19 states. [2020-04-17 14:33:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:35,018 INFO L93 Difference]: Finished difference Result 6258 states and 14186 transitions. [2020-04-17 14:33:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:33:35,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-04-17 14:33:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:35,026 INFO L225 Difference]: With dead ends: 6258 [2020-04-17 14:33:35,026 INFO L226 Difference]: Without dead ends: 6258 [2020-04-17 14:33:35,026 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:33:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6258 states. [2020-04-17 14:33:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6258 to 4697. [2020-04-17 14:33:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2020-04-17 14:33:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 11006 transitions. [2020-04-17 14:33:35,087 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 11006 transitions. Word has length 67 [2020-04-17 14:33:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:35,088 INFO L479 AbstractCegarLoop]: Abstraction has 4697 states and 11006 transitions. [2020-04-17 14:33:35,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:33:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 11006 transitions. [2020-04-17 14:33:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-04-17 14:33:35,092 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:35,092 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:35,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:35,296 INFO L427 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:35,297 INFO L82 PathProgramCache]: Analyzing trace with hash 245078722, now seen corresponding path program 32 times [2020-04-17 14:33:35,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:35,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147837811] [2020-04-17 14:33:35,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-04-17 14:33:35,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147837811] [2020-04-17 14:33:35,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160385553] [2020-04-17 14:33:35,480 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:35,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:35,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:35,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:33:35,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:33:35,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:35,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 18 [2020-04-17 14:33:35,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892201645] [2020-04-17 14:33:35,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:33:35,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:33:35,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:33:35,605 INFO L87 Difference]: Start difference. First operand 4697 states and 11006 transitions. Second operand 19 states. [2020-04-17 14:33:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:35,878 INFO L93 Difference]: Finished difference Result 5706 states and 13010 transitions. [2020-04-17 14:33:35,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:33:35,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-04-17 14:33:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:35,885 INFO L225 Difference]: With dead ends: 5706 [2020-04-17 14:33:35,885 INFO L226 Difference]: Without dead ends: 5706 [2020-04-17 14:33:35,886 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:33:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2020-04-17 14:33:35,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 4697. [2020-04-17 14:33:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2020-04-17 14:33:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 11006 transitions. [2020-04-17 14:33:35,938 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 11006 transitions. Word has length 67 [2020-04-17 14:33:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:35,939 INFO L479 AbstractCegarLoop]: Abstraction has 4697 states and 11006 transitions. [2020-04-17 14:33:35,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:33:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 11006 transitions. [2020-04-17 14:33:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-04-17 14:33:35,944 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:35,944 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2020-04-17 14:33:36,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:36,148 INFO L427 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1159213619, now seen corresponding path program 9 times [2020-04-17 14:33:36,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:36,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799552990] [2020-04-17 14:33:36,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 9 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:36,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799552990] [2020-04-17 14:33:36,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177732251] [2020-04-17 14:33:36,428 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:36,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:33:36,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:36,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:36,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 9 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:36,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:36,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20] total 29 [2020-04-17 14:33:36,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354612403] [2020-04-17 14:33:36,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-04-17 14:33:36,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:36,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-17 14:33:36,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:33:36,819 INFO L87 Difference]: Start difference. First operand 4697 states and 11006 transitions. Second operand 30 states. [2020-04-17 14:33:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:37,293 INFO L93 Difference]: Finished difference Result 5454 states and 12513 transitions. [2020-04-17 14:33:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:33:37,294 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-04-17 14:33:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:37,299 INFO L225 Difference]: With dead ends: 5454 [2020-04-17 14:33:37,300 INFO L226 Difference]: Without dead ends: 5454 [2020-04-17 14:33:37,300 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:33:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5454 states. [2020-04-17 14:33:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5454 to 4802. [2020-04-17 14:33:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4802 states. [2020-04-17 14:33:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11253 transitions. [2020-04-17 14:33:37,361 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11253 transitions. Word has length 69 [2020-04-17 14:33:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:37,362 INFO L479 AbstractCegarLoop]: Abstraction has 4802 states and 11253 transitions. [2020-04-17 14:33:37,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-04-17 14:33:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11253 transitions. [2020-04-17 14:33:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-17 14:33:37,367 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:37,367 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:37,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:37,568 INFO L427 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1434312909, now seen corresponding path program 33 times [2020-04-17 14:33:37,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:37,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469436332] [2020-04-17 14:33:37,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:37,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469436332] [2020-04-17 14:33:37,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345005094] [2020-04-17 14:33:37,790 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:38,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:38,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:38,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:38,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:38,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:38,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 25 [2020-04-17 14:33:38,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726665331] [2020-04-17 14:33:38,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:33:38,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:38,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:33:38,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:33:38,117 INFO L87 Difference]: Start difference. First operand 4802 states and 11253 transitions. Second operand 26 states. [2020-04-17 14:33:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:38,556 INFO L93 Difference]: Finished difference Result 6401 states and 14628 transitions. [2020-04-17 14:33:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:33:38,556 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-04-17 14:33:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:38,564 INFO L225 Difference]: With dead ends: 6401 [2020-04-17 14:33:38,564 INFO L226 Difference]: Without dead ends: 6401 [2020-04-17 14:33:38,565 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=1423, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:33:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2020-04-17 14:33:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 4788. [2020-04-17 14:33:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4788 states. [2020-04-17 14:33:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 11214 transitions. [2020-04-17 14:33:38,621 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 11214 transitions. Word has length 73 [2020-04-17 14:33:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:38,621 INFO L479 AbstractCegarLoop]: Abstraction has 4788 states and 11214 transitions. [2020-04-17 14:33:38,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:33:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 11214 transitions. [2020-04-17 14:33:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-17 14:33:38,625 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:38,625 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:38,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:38,825 INFO L427 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:38,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1130039719, now seen corresponding path program 34 times [2020-04-17 14:33:38,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:38,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051623383] [2020-04-17 14:33:38,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:39,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051623383] [2020-04-17 14:33:39,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162823054] [2020-04-17 14:33:39,030 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:39,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:39,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:39,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:39,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:39,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:39,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 25 [2020-04-17 14:33:39,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061532857] [2020-04-17 14:33:39,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:33:39,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:33:39,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:33:39,188 INFO L87 Difference]: Start difference. First operand 4788 states and 11214 transitions. Second operand 26 states. [2020-04-17 14:33:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:39,611 INFO L93 Difference]: Finished difference Result 6587 states and 14945 transitions. [2020-04-17 14:33:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:33:39,612 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-04-17 14:33:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:39,621 INFO L225 Difference]: With dead ends: 6587 [2020-04-17 14:33:39,621 INFO L226 Difference]: Without dead ends: 6587 [2020-04-17 14:33:39,621 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=373, Invalid=1349, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:33:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6587 states. [2020-04-17 14:33:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6587 to 4774. [2020-04-17 14:33:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4774 states. [2020-04-17 14:33:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4774 states to 4774 states and 11175 transitions. [2020-04-17 14:33:39,684 INFO L78 Accepts]: Start accepts. Automaton has 4774 states and 11175 transitions. Word has length 73 [2020-04-17 14:33:39,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:39,686 INFO L479 AbstractCegarLoop]: Abstraction has 4774 states and 11175 transitions. [2020-04-17 14:33:39,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:33:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4774 states and 11175 transitions. [2020-04-17 14:33:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-17 14:33:39,692 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:39,692 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:39,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:39,897 INFO L427 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1821324467, now seen corresponding path program 35 times [2020-04-17 14:33:39,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:39,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914632543] [2020-04-17 14:33:39,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:40,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914632543] [2020-04-17 14:33:40,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739916060] [2020-04-17 14:33:40,168 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:40,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:40,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:40,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:40,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:33:40,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:40,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 25 [2020-04-17 14:33:40,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54435029] [2020-04-17 14:33:40,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:33:40,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:40,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:33:40,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:33:40,380 INFO L87 Difference]: Start difference. First operand 4774 states and 11175 transitions. Second operand 26 states. [2020-04-17 14:33:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:40,768 INFO L93 Difference]: Finished difference Result 6567 states and 14817 transitions. [2020-04-17 14:33:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:33:40,768 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-04-17 14:33:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:40,776 INFO L225 Difference]: With dead ends: 6567 [2020-04-17 14:33:40,776 INFO L226 Difference]: Without dead ends: 6567 [2020-04-17 14:33:40,776 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:33:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6567 states. [2020-04-17 14:33:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6567 to 4892. [2020-04-17 14:33:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4892 states. [2020-04-17 14:33:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4892 states to 4892 states and 11508 transitions. [2020-04-17 14:33:40,834 INFO L78 Accepts]: Start accepts. Automaton has 4892 states and 11508 transitions. Word has length 73 [2020-04-17 14:33:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:40,835 INFO L479 AbstractCegarLoop]: Abstraction has 4892 states and 11508 transitions. [2020-04-17 14:33:40,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:33:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4892 states and 11508 transitions. [2020-04-17 14:33:40,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-17 14:33:40,838 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:40,839 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:41,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:41,039 INFO L427 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:41,040 INFO L82 PathProgramCache]: Analyzing trace with hash 907547604, now seen corresponding path program 7 times [2020-04-17 14:33:41,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:41,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055113124] [2020-04-17 14:33:41,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 24 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:33:42,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055113124] [2020-04-17 14:33:42,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347369473] [2020-04-17 14:33:42,235 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:42,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 103 conjunts are in the unsatisfiable core [2020-04-17 14:33:42,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:42,378 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:42,379 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 83 [2020-04-17 14:33:42,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:42,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:42,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:42,381 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-04-17 14:33:42,429 INFO L619 ElimStorePlain]: treesize reduction 61, result has 29.1 percent of original size [2020-04-17 14:33:42,430 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 14:33:42,430 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:4 [2020-04-17 14:33:42,636 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-04-17 14:33:42,636 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:42,644 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:42,644 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:42,645 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-04-17 14:33:43,012 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:33:43,013 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 14:33:43,013 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:43,030 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:43,031 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:43,031 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2020-04-17 14:33:43,345 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:33:43,347 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 14:33:43,347 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:43,360 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:43,360 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:43,361 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2020-04-17 14:33:43,791 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 14:33:43,792 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 14:33:43,793 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:43,807 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:43,807 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:43,807 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2020-04-17 14:33:44,021 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-04-17 14:33:44,021 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:44,030 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 14:33:44,030 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:44,031 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-04-17 14:33:45,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:45,147 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2020-04-17 14:33:45,148 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:45,151 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 19 [2020-04-17 14:33:45,152 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 14:33:45,173 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 14:33:45,174 INFO L539 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 14:33:45,174 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:116, output treesize:11 [2020-04-17 14:33:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 30 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:33:45,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:45,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31] total 65 [2020-04-17 14:33:45,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935323046] [2020-04-17 14:33:45,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-04-17 14:33:45,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:45,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-04-17 14:33:45,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4196, Unknown=0, NotChecked=0, Total=4422 [2020-04-17 14:33:45,309 INFO L87 Difference]: Start difference. First operand 4892 states and 11508 transitions. Second operand 67 states. [2020-04-17 14:33:45,717 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-04-17 14:33:46,269 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-04-17 14:33:46,550 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-04-17 14:33:47,082 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-04-17 14:33:47,473 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 77 [2020-04-17 14:33:47,924 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2020-04-17 14:33:48,342 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 80 [2020-04-17 14:33:48,627 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-04-17 14:33:49,307 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 86 [2020-04-17 14:33:49,647 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-04-17 14:33:50,203 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2020-04-17 14:33:50,702 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-04-17 14:33:51,116 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-04-17 14:33:51,628 WARN L192 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-04-17 14:33:52,200 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 77 [2020-04-17 14:33:52,596 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2020-04-17 14:33:53,044 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-04-17 14:33:53,290 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-04-17 14:33:53,805 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-04-17 14:33:54,294 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-04-17 14:33:54,544 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-04-17 14:33:55,023 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 83 [2020-04-17 14:33:56,136 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 71 [2020-04-17 14:33:56,605 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2020-04-17 14:33:57,136 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 92 [2020-04-17 14:33:57,590 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-04-17 14:33:58,145 WARN L192 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 76 [2020-04-17 14:33:58,680 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 73 [2020-04-17 14:33:59,249 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2020-04-17 14:33:59,777 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 75 [2020-04-17 14:34:00,412 WARN L192 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2020-04-17 14:34:01,015 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 67 [2020-04-17 14:34:01,824 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2020-04-17 14:34:02,467 WARN L192 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 86 [2020-04-17 14:34:02,934 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 81 [2020-04-17 14:34:03,412 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-04-17 14:34:03,949 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 93 [2020-04-17 14:34:04,328 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-04-17 14:34:04,833 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-04-17 14:34:05,234 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-04-17 14:34:05,668 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-04-17 14:34:06,002 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-04-17 14:34:06,348 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-04-17 14:34:06,629 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-04-17 14:34:07,292 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-04-17 14:34:07,534 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2020-04-17 14:34:08,039 WARN L192 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2020-04-17 14:34:08,356 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-04-17 14:34:08,766 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 81 [2020-04-17 14:34:09,047 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-04-17 14:34:09,432 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-04-17 14:34:09,708 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-04-17 14:34:10,140 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-04-17 14:34:10,797 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-04-17 14:34:11,236 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-04-17 14:34:11,497 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-04-17 14:34:11,737 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-04-17 14:34:13,675 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-04-17 14:34:13,916 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-04-17 14:34:14,211 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-04-17 14:34:14,592 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2020-04-17 14:34:15,139 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-04-17 14:34:20,375 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-04-17 14:34:22,188 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-04-17 14:34:22,400 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-04-17 14:34:22,754 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-04-17 14:34:23,094 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-04-17 14:34:23,618 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-04-17 14:34:24,022 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-04-17 14:34:24,221 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-04-17 14:34:25,575 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-04-17 14:34:25,822 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-04-17 14:34:26,224 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-04-17 14:34:26,577 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-04-17 14:34:26,912 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-04-17 14:34:27,258 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-04-17 14:34:27,507 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-04-17 14:34:28,007 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-04-17 14:34:28,236 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-04-17 14:34:28,523 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-04-17 14:34:28,848 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-04-17 14:34:29,339 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2020-04-17 14:34:29,721 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-04-17 14:34:30,083 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2020-04-17 14:34:30,366 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-04-17 14:34:30,802 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 67 [2020-04-17 14:34:31,287 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 71 [2020-04-17 14:34:31,704 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-04-17 14:34:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:31,796 INFO L93 Difference]: Finished difference Result 17386 states and 39203 transitions. [2020-04-17 14:34:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-04-17 14:34:31,797 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 73 [2020-04-17 14:34:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:31,815 INFO L225 Difference]: With dead ends: 17386 [2020-04-17 14:34:31,815 INFO L226 Difference]: Without dead ends: 17226 [2020-04-17 14:34:31,816 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12300 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=5915, Invalid=35905, Unknown=0, NotChecked=0, Total=41820 [2020-04-17 14:34:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2020-04-17 14:34:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 6160. [2020-04-17 14:34:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6160 states. [2020-04-17 14:34:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 14606 transitions. [2020-04-17 14:34:31,937 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 14606 transitions. Word has length 73 [2020-04-17 14:34:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:31,937 INFO L479 AbstractCegarLoop]: Abstraction has 6160 states and 14606 transitions. [2020-04-17 14:34:31,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-04-17 14:34:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 14606 transitions. [2020-04-17 14:34:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-17 14:34:31,941 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:31,941 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:32,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:32,142 INFO L427 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:32,142 INFO L82 PathProgramCache]: Analyzing trace with hash 235748313, now seen corresponding path program 36 times [2020-04-17 14:34:32,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:32,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639467977] [2020-04-17 14:34:32,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:34:32,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639467977] [2020-04-17 14:34:32,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527262334] [2020-04-17 14:34:32,511 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:33,246 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:34:33,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:33,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:34:33,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:34:33,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:33,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 25 [2020-04-17 14:34:33,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851350191] [2020-04-17 14:34:33,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:33,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:33,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:33,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:33,300 INFO L87 Difference]: Start difference. First operand 6160 states and 14606 transitions. Second operand 26 states. [2020-04-17 14:34:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:33,719 INFO L93 Difference]: Finished difference Result 8072 states and 18426 transitions. [2020-04-17 14:34:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:34:33,719 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-04-17 14:34:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:33,728 INFO L225 Difference]: With dead ends: 8072 [2020-04-17 14:34:33,728 INFO L226 Difference]: Without dead ends: 8072 [2020-04-17 14:34:33,728 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:34:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8072 states. [2020-04-17 14:34:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8072 to 6174. [2020-04-17 14:34:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6174 states. [2020-04-17 14:34:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6174 states to 6174 states and 14643 transitions. [2020-04-17 14:34:33,803 INFO L78 Accepts]: Start accepts. Automaton has 6174 states and 14643 transitions. Word has length 73 [2020-04-17 14:34:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:33,803 INFO L479 AbstractCegarLoop]: Abstraction has 6174 states and 14643 transitions. [2020-04-17 14:34:33,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6174 states and 14643 transitions. [2020-04-17 14:34:33,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-17 14:34:33,807 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:33,808 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:34,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:34,008 INFO L427 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -21539379, now seen corresponding path program 37 times [2020-04-17 14:34:34,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:34,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656020783] [2020-04-17 14:34:34,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:34:34,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656020783] [2020-04-17 14:34:34,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322411308] [2020-04-17 14:34:34,243 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:34,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:34:34,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:34:34,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:34,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 25 [2020-04-17 14:34:34,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597595677] [2020-04-17 14:34:34,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:34,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:34,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:34,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:34,407 INFO L87 Difference]: Start difference. First operand 6174 states and 14643 transitions. Second operand 26 states. [2020-04-17 14:34:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:34,782 INFO L93 Difference]: Finished difference Result 8081 states and 18431 transitions. [2020-04-17 14:34:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:34:34,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-04-17 14:34:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:34,790 INFO L225 Difference]: With dead ends: 8081 [2020-04-17 14:34:34,791 INFO L226 Difference]: Without dead ends: 8081 [2020-04-17 14:34:34,791 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:34:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2020-04-17 14:34:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 6258. [2020-04-17 14:34:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6258 states. [2020-04-17 14:34:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6258 states to 6258 states and 14869 transitions. [2020-04-17 14:34:34,864 INFO L78 Accepts]: Start accepts. Automaton has 6258 states and 14869 transitions. Word has length 73 [2020-04-17 14:34:34,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:34,864 INFO L479 AbstractCegarLoop]: Abstraction has 6258 states and 14869 transitions. [2020-04-17 14:34:34,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 6258 states and 14869 transitions. [2020-04-17 14:34:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-17 14:34:34,868 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:34,868 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:35,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:35,069 INFO L427 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash -624041639, now seen corresponding path program 38 times [2020-04-17 14:34:35,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:35,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25284705] [2020-04-17 14:34:35,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:34:35,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25284705] [2020-04-17 14:34:35,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970362359] [2020-04-17 14:34:35,324 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:35,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:35,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:35,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:34:35,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:34:35,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:35,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 25 [2020-04-17 14:34:35,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179616661] [2020-04-17 14:34:35,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:35,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:35,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:35,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:35,495 INFO L87 Difference]: Start difference. First operand 6258 states and 14869 transitions. Second operand 26 states. [2020-04-17 14:34:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:35,844 INFO L93 Difference]: Finished difference Result 7483 states and 17318 transitions. [2020-04-17 14:34:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:34:35,845 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-04-17 14:34:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:35,853 INFO L225 Difference]: With dead ends: 7483 [2020-04-17 14:34:35,853 INFO L226 Difference]: Without dead ends: 7483 [2020-04-17 14:34:35,854 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:34:35,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7483 states. [2020-04-17 14:34:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7483 to 6286. [2020-04-17 14:34:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6286 states. [2020-04-17 14:34:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6286 states to 6286 states and 14945 transitions. [2020-04-17 14:34:35,926 INFO L78 Accepts]: Start accepts. Automaton has 6286 states and 14945 transitions. Word has length 73 [2020-04-17 14:34:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:35,926 INFO L479 AbstractCegarLoop]: Abstraction has 6286 states and 14945 transitions. [2020-04-17 14:34:35,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6286 states and 14945 transitions. [2020-04-17 14:34:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-17 14:34:35,932 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:35,932 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:36,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:36,137 INFO L427 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:36,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1819902029, now seen corresponding path program 39 times [2020-04-17 14:34:36,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:36,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276886751] [2020-04-17 14:34:36,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 14:34:36,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276886751] [2020-04-17 14:34:36,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411913567] [2020-04-17 14:34:36,522 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:36,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:34:36,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:36,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:34:36,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 14:34:36,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:36,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17] total 26 [2020-04-17 14:34:36,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744806148] [2020-04-17 14:34:36,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:34:36,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:34:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:34:36,937 INFO L87 Difference]: Start difference. First operand 6286 states and 14945 transitions. Second operand 27 states. [2020-04-17 14:34:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:37,348 INFO L93 Difference]: Finished difference Result 7206 states and 16766 transitions. [2020-04-17 14:34:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:34:37,349 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2020-04-17 14:34:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:37,357 INFO L225 Difference]: With dead ends: 7206 [2020-04-17 14:34:37,357 INFO L226 Difference]: Without dead ends: 7206 [2020-04-17 14:34:37,358 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:34:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7206 states. [2020-04-17 14:34:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7206 to 6300. [2020-04-17 14:34:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6300 states. [2020-04-17 14:34:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 14984 transitions. [2020-04-17 14:34:37,429 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 14984 transitions. Word has length 73 [2020-04-17 14:34:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:37,429 INFO L479 AbstractCegarLoop]: Abstraction has 6300 states and 14984 transitions. [2020-04-17 14:34:37,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:34:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 14984 transitions. [2020-04-17 14:34:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-04-17 14:34:37,433 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:37,433 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:37,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:37,634 INFO L427 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:37,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash -660016278, now seen corresponding path program 40 times [2020-04-17 14:34:37,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:37,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818105140] [2020-04-17 14:34:37,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 155 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:34:37,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818105140] [2020-04-17 14:34:37,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785719926] [2020-04-17 14:34:37,825 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:37,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:37,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:37,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:34:37,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 155 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-17 14:34:37,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:37,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 20 [2020-04-17 14:34:37,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443327397] [2020-04-17 14:34:37,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:34:38,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:38,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:34:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:34:38,000 INFO L87 Difference]: Start difference. First operand 6300 states and 14984 transitions. Second operand 21 states. Received shutdown request... [2020-04-17 14:34:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:34:38,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:38,600 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 14:34:38,604 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 14:34:38,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 02:34:38 BasicIcfg [2020-04-17 14:34:38,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 14:34:38,605 INFO L168 Benchmark]: Toolchain (without parser) took 250737.14 ms. Allocated memory was 139.5 MB in the beginning and 822.1 MB in the end (delta: 682.6 MB). Free memory was 97.4 MB in the beginning and 301.8 MB in the end (delta: -204.4 MB). Peak memory consumption was 478.2 MB. Max. memory is 7.1 GB. [2020-04-17 14:34:38,606 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 139.5 MB. Free memory was 117.5 MB in the beginning and 117.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 14:34:38,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 929.13 ms. Allocated memory was 139.5 MB in the beginning and 198.7 MB in the end (delta: 59.2 MB). Free memory was 95.4 MB in the beginning and 127.5 MB in the end (delta: -32.2 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. [2020-04-17 14:34:38,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 93.36 ms. Allocated memory is still 198.7 MB. Free memory was 127.5 MB in the beginning and 124.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-04-17 14:34:38,607 INFO L168 Benchmark]: Boogie Preprocessor took 46.15 ms. Allocated memory is still 198.7 MB. Free memory was 124.5 MB in the beginning and 122.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-04-17 14:34:38,607 INFO L168 Benchmark]: RCFGBuilder took 652.09 ms. Allocated memory is still 198.7 MB. Free memory was 122.3 MB in the beginning and 89.7 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. [2020-04-17 14:34:38,607 INFO L168 Benchmark]: TraceAbstraction took 248982.78 ms. Allocated memory was 198.7 MB in the beginning and 822.1 MB in the end (delta: 623.4 MB). Free memory was 89.7 MB in the beginning and 301.8 MB in the end (delta: -212.2 MB). Peak memory consumption was 411.2 MB. Max. memory is 7.1 GB. [2020-04-17 14:34:38,608 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 139.5 MB. Free memory was 117.5 MB in the beginning and 117.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 929.13 ms. Allocated memory was 139.5 MB in the beginning and 198.7 MB in the end (delta: 59.2 MB). Free memory was 95.4 MB in the beginning and 127.5 MB in the end (delta: -32.2 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 93.36 ms. Allocated memory is still 198.7 MB. Free memory was 127.5 MB in the beginning and 124.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.15 ms. Allocated memory is still 198.7 MB. Free memory was 124.5 MB in the beginning and 122.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 652.09 ms. Allocated memory is still 198.7 MB. Free memory was 122.3 MB in the beginning and 89.7 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248982.78 ms. Allocated memory was 198.7 MB in the beginning and 822.1 MB in the end (delta: 623.4 MB). Free memory was 89.7 MB in the beginning and 301.8 MB in the end (delta: -212.2 MB). Peak memory consumption was 411.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 4.2s, 133 ProgramPointsBefore, 40 ProgramPointsAfterwards, 138 TransitionsBefore, 40 TransitionsAfterwards, 5744 CoEnabledTransitionPairs, 7 FixpointIterations, 26 TrivialSequentialCompositions, 75 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 5 ChoiceCompositions, 3051 VarBasedMoverChecksPositive, 49 VarBasedMoverChecksNegative, 4 SemBasedMoverChecksPositive, 62 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 0 MoverChecksTotal, 7699 CheckedPairsTotal, 118 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 922]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 922). Cancelled while BasicCegarLoop was constructing difference of abstraction (6300states) and FLOYD_HOARE automaton (currently 26 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (1684 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 922]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 922). Cancelled while BasicCegarLoop was constructing difference of abstraction (6300states) and FLOYD_HOARE automaton (currently 26 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (1684 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 127 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 248.8s, OverallIterations: 63, TraceHistogramMax: 10, AutomataDifference: 181.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 3511 SDtfs, 31096 SDslu, 45280 SDs, 0 SdLazy, 34148 SolverSat, 4424 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 51.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5500 GetRequests, 3100 SyntacticMatches, 14 SemanticMatches, 2386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57726 ImplicationChecksByTransitivity, 150.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6300occurred in iteration=62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 62 MinimizatonAttempts, 76365 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 36.6s InterpolantComputationTime, 6381 NumberOfCodeBlocks, 6342 NumberOfCodeBlocksAsserted, 280 NumberOfCheckSat, 6261 ConstructedInterpolants, 285 QuantifiedInterpolants, 2268352 SizeOfPredicates, 711 NumberOfNonLiveVariables, 21767 ConjunctsInSsa, 1400 ConjunctsInUnsatCore, 120 InterpolantComputations, 10 PerfectInterpolantSequences, 1367/12808 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