/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/add-sub06.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8b99979fc9bd30b823d307a67cb055caa4790482-8b99979 [2021-06-30 11:47:31,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-30 11:47:31,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-30 11:47:31,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-30 11:47:31,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-30 11:47:31,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-30 11:47:31,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-30 11:47:31,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-30 11:47:31,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-30 11:47:31,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-30 11:47:31,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-30 11:47:31,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-30 11:47:31,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-30 11:47:31,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-30 11:47:31,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-30 11:47:31,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-30 11:47:31,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-30 11:47:31,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-30 11:47:31,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-30 11:47:31,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-30 11:47:31,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-30 11:47:31,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-30 11:47:31,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-30 11:47:31,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-30 11:47:31,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-30 11:47:31,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-30 11:47:31,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-30 11:47:31,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-30 11:47:31,253 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-30 11:47:31,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-30 11:47:31,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-30 11:47:31,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-30 11:47:31,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-30 11:47:31,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-30 11:47:31,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-30 11:47:31,297 INFO L138 SettingsManager]: * Use SBE=true [2021-06-30 11:47:31,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-30 11:47:31,298 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-30 11:47:31,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-30 11:47:31,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-30 11:47:31,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-30 11:47:31,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-30 11:47:31,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-30 11:47:31,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-30 11:47:31,299 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-30 11:47:31,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-30 11:47:31,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-30 11:47:31,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-30 11:47:31,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-30 11:47:31,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-30 11:47:31,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-30 11:47:31,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-30 11:47:31,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-30 11:47:31,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-30 11:47:31,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-30 11:47:31,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-30 11:47:31,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-30 11:47:31,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-30 11:47:31,301 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-30 11:47:31,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-30 11:47:31,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-30 11:47:31,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-30 11:47:31,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-30 11:47:31,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-30 11:47:31,603 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-30 11:47:31,604 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-30 11:47:31,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub06.bpl [2021-06-30 11:47:31,605 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub06.bpl' [2021-06-30 11:47:31,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-30 11:47:31,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-30 11:47:31,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-30 11:47:31,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-30 11:47:31,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-30 11:47:31,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-30 11:47:31,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-30 11:47:31,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-30 11:47:31,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-30 11:47:31,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-30 11:47:31,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-30 11:47:31,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-30 11:47:31,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-30 11:47:31,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (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 [2021-06-30 11:47:31,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-30 11:47:31,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-30 11:47:31,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-30 11:47:31,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-06-30 11:47:31,737 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-06-30 11:47:31,737 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-06-30 11:47:31,738 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-30 11:47:31,876 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-30 11:47:31,876 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-30 11:47:31,878 INFO L202 PluginConnector]: Adding new model add-sub06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:47:31 BoogieIcfgContainer [2021-06-30 11:47:31,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-30 11:47:31,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-30 11:47:31,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-30 11:47:31,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-30 11:47:31,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/2) ... [2021-06-30 11:47:31,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13279145 and model type add-sub06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.06 11:47:31, skipping insertion in model container [2021-06-30 11:47:31,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:47:31" (2/2) ... [2021-06-30 11:47:31,887 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub06.bpl [2021-06-30 11:47:31,897 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-30 11:47:31,898 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-30 11:47:31,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-30 11:47:31,899 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-30 11:47:31,990 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,991 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,991 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,991 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,991 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,992 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,992 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,992 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,992 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,992 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,993 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,993 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,993 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,993 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,994 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,994 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,994 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,994 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,995 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,995 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,995 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,995 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,995 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,996 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,996 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,996 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,996 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,997 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,997 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,997 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,997 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,997 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,998 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,998 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,998 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,998 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,001 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,006 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,008 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,011 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,014 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,035 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:32,066 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-06-30 11:47:32,087 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-30 11:47:32,120 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-30 11:47:32,120 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-30 11:47:32,120 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-30 11:47:32,121 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-30 11:47:32,121 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-30 11:47:32,121 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-30 11:47:32,121 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-30 11:47:32,121 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-30 11:47:32,130 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 46 transitions, 140 flow [2021-06-30 11:47:33,001 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6830 states, 6827 states have (on average 5.866705727259411) internal successors, (40052), 6827 states have internal predecessors, (40052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 6830 states, 6827 states have (on average 5.866705727259411) internal successors, (40052), 6827 states have internal predecessors, (40052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:33,148 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:33,149 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:33,150 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:33,171 INFO L82 PathProgramCache]: Analyzing trace with hash -870267671, now seen corresponding path program 1 times [2021-06-30 11:47:33,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:33,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274586483] [2021-06-30 11:47:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:33,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:33,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274586483] [2021-06-30 11:47:33,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274586483] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:33,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:33,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-30 11:47:33,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833121771] [2021-06-30 11:47:33,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-30 11:47:33,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:33,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-30 11:47:33,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:47:33,428 INFO L87 Difference]: Start difference. First operand has 6830 states, 6827 states have (on average 5.866705727259411) internal successors, (40052), 6827 states have internal predecessors, (40052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:33,695 INFO L93 Difference]: Finished difference Result 8284 states and 48435 transitions. [2021-06-30 11:47:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-30 11:47:33,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:33,891 INFO L225 Difference]: With dead ends: 8284 [2021-06-30 11:47:33,891 INFO L226 Difference]: Without dead ends: 8277 [2021-06-30 11:47:33,893 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:47:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2021-06-30 11:47:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 7010. [2021-06-30 11:47:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7010 states, 7009 states have (on average 5.856755599942931) internal successors, (41050), 7009 states have internal predecessors, (41050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7010 states to 7010 states and 41050 transitions. [2021-06-30 11:47:34,564 INFO L78 Accepts]: Start accepts. Automaton has 7010 states and 41050 transitions. Word has length 20 [2021-06-30 11:47:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:34,565 INFO L482 AbstractCegarLoop]: Abstraction has 7010 states and 41050 transitions. [2021-06-30 11:47:34,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7010 states and 41050 transitions. [2021-06-30 11:47:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:34,737 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:34,737 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:34,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-30 11:47:34,740 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:34,747 INFO L82 PathProgramCache]: Analyzing trace with hash -558840843, now seen corresponding path program 1 times [2021-06-30 11:47:34,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:34,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466106286] [2021-06-30 11:47:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:34,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466106286] [2021-06-30 11:47:34,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466106286] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:34,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:34,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:34,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140857543] [2021-06-30 11:47:34,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:34,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:34,888 INFO L87 Difference]: Start difference. First operand 7010 states and 41050 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:35,193 INFO L93 Difference]: Finished difference Result 8928 states and 52153 transitions. [2021-06-30 11:47:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:35,280 INFO L225 Difference]: With dead ends: 8928 [2021-06-30 11:47:35,281 INFO L226 Difference]: Without dead ends: 8909 [2021-06-30 11:47:35,282 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8909 states. [2021-06-30 11:47:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8909 to 7169. [2021-06-30 11:47:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7169 states, 7168 states have (on average 5.853655133928571) internal successors, (41959), 7168 states have internal predecessors, (41959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7169 states to 7169 states and 41959 transitions. [2021-06-30 11:47:36,092 INFO L78 Accepts]: Start accepts. Automaton has 7169 states and 41959 transitions. Word has length 23 [2021-06-30 11:47:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:36,097 INFO L482 AbstractCegarLoop]: Abstraction has 7169 states and 41959 transitions. [2021-06-30 11:47:36,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 7169 states and 41959 transitions. [2021-06-30 11:47:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:36,131 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:36,132 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:36,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-30 11:47:36,132 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash -758669603, now seen corresponding path program 1 times [2021-06-30 11:47:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:36,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926120708] [2021-06-30 11:47:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:36,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:36,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926120708] [2021-06-30 11:47:36,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926120708] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:36,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:36,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:36,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217434149] [2021-06-30 11:47:36,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:36,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:36,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:36,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:36,232 INFO L87 Difference]: Start difference. First operand 7169 states and 41959 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:36,501 INFO L93 Difference]: Finished difference Result 9329 states and 54442 transitions. [2021-06-30 11:47:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:36,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:36,682 INFO L225 Difference]: With dead ends: 9329 [2021-06-30 11:47:36,682 INFO L226 Difference]: Without dead ends: 9306 [2021-06-30 11:47:36,683 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9306 states. [2021-06-30 11:47:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9306 to 7497. [2021-06-30 11:47:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7497 states, 7496 states have (on average 5.8675293489861255) internal successors, (43983), 7496 states have internal predecessors, (43983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7497 states to 7497 states and 43983 transitions. [2021-06-30 11:47:37,183 INFO L78 Accepts]: Start accepts. Automaton has 7497 states and 43983 transitions. Word has length 23 [2021-06-30 11:47:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:37,183 INFO L482 AbstractCegarLoop]: Abstraction has 7497 states and 43983 transitions. [2021-06-30 11:47:37,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7497 states and 43983 transitions. [2021-06-30 11:47:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:37,229 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:37,229 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:37,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-30 11:47:37,229 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:37,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1022368725, now seen corresponding path program 1 times [2021-06-30 11:47:37,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:37,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100248891] [2021-06-30 11:47:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:37,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:37,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100248891] [2021-06-30 11:47:37,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100248891] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:37,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:37,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:37,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406211448] [2021-06-30 11:47:37,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:37,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:37,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:37,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:37,316 INFO L87 Difference]: Start difference. First operand 7497 states and 43983 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:37,446 INFO L93 Difference]: Finished difference Result 9677 states and 56500 transitions. [2021-06-30 11:47:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:37,686 INFO L225 Difference]: With dead ends: 9677 [2021-06-30 11:47:37,686 INFO L226 Difference]: Without dead ends: 9662 [2021-06-30 11:47:37,691 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9662 states. [2021-06-30 11:47:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9662 to 7787. [2021-06-30 11:47:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7787 states, 7786 states have (on average 5.877857693295659) internal successors, (45765), 7786 states have internal predecessors, (45765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7787 states to 7787 states and 45765 transitions. [2021-06-30 11:47:38,228 INFO L78 Accepts]: Start accepts. Automaton has 7787 states and 45765 transitions. Word has length 23 [2021-06-30 11:47:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:38,228 INFO L482 AbstractCegarLoop]: Abstraction has 7787 states and 45765 transitions. [2021-06-30 11:47:38,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7787 states and 45765 transitions. [2021-06-30 11:47:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:38,261 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:38,261 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:38,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-30 11:47:38,262 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:38,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:38,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1093080249, now seen corresponding path program 1 times [2021-06-30 11:47:38,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:38,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169360042] [2021-06-30 11:47:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:38,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169360042] [2021-06-30 11:47:38,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169360042] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:38,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:38,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:38,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14948790] [2021-06-30 11:47:38,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:38,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:38,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:38,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:38,319 INFO L87 Difference]: Start difference. First operand 7787 states and 45765 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:38,455 INFO L93 Difference]: Finished difference Result 9783 states and 57218 transitions. [2021-06-30 11:47:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:38,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:38,678 INFO L225 Difference]: With dead ends: 9783 [2021-06-30 11:47:38,678 INFO L226 Difference]: Without dead ends: 9751 [2021-06-30 11:47:38,688 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9751 states. [2021-06-30 11:47:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9751 to 8011. [2021-06-30 11:47:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8011 states, 8010 states have (on average 5.876154806491885) internal successors, (47068), 8010 states have internal predecessors, (47068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8011 states to 8011 states and 47068 transitions. [2021-06-30 11:47:39,257 INFO L78 Accepts]: Start accepts. Automaton has 8011 states and 47068 transitions. Word has length 23 [2021-06-30 11:47:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:39,258 INFO L482 AbstractCegarLoop]: Abstraction has 8011 states and 47068 transitions. [2021-06-30 11:47:39,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 8011 states and 47068 transitions. [2021-06-30 11:47:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:39,293 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:39,293 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:39,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-30 11:47:39,294 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:39,294 INFO L82 PathProgramCache]: Analyzing trace with hash 128192705, now seen corresponding path program 1 times [2021-06-30 11:47:39,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:39,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034823391] [2021-06-30 11:47:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:39,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:39,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034823391] [2021-06-30 11:47:39,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034823391] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:39,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:39,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:39,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385449860] [2021-06-30 11:47:39,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:39,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:39,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:39,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:39,359 INFO L87 Difference]: Start difference. First operand 8011 states and 47068 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:39,506 INFO L93 Difference]: Finished difference Result 10170 states and 59559 transitions. [2021-06-30 11:47:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:39,559 INFO L225 Difference]: With dead ends: 10170 [2021-06-30 11:47:39,560 INFO L226 Difference]: Without dead ends: 10143 [2021-06-30 11:47:39,560 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10143 states. [2021-06-30 11:47:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10143 to 8253. [2021-06-30 11:47:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8253 states, 8252 states have (on average 5.8788172564226855) internal successors, (48512), 8252 states have internal predecessors, (48512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8253 states to 8253 states and 48512 transitions. [2021-06-30 11:47:40,084 INFO L78 Accepts]: Start accepts. Automaton has 8253 states and 48512 transitions. Word has length 23 [2021-06-30 11:47:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:40,084 INFO L482 AbstractCegarLoop]: Abstraction has 8253 states and 48512 transitions. [2021-06-30 11:47:40,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 8253 states and 48512 transitions. [2021-06-30 11:47:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:40,113 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:40,113 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:40,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-30 11:47:40,113 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:40,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1537139065, now seen corresponding path program 1 times [2021-06-30 11:47:40,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:40,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636422008] [2021-06-30 11:47:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:40,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:40,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636422008] [2021-06-30 11:47:40,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636422008] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:40,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:40,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:40,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741210499] [2021-06-30 11:47:40,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:40,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:40,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:40,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:40,158 INFO L87 Difference]: Start difference. First operand 8253 states and 48512 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:40,425 INFO L93 Difference]: Finished difference Result 10442 states and 61133 transitions. [2021-06-30 11:47:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:40,469 INFO L225 Difference]: With dead ends: 10442 [2021-06-30 11:47:40,470 INFO L226 Difference]: Without dead ends: 10431 [2021-06-30 11:47:40,470 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-06-30 11:47:40,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 8447. [2021-06-30 11:47:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8447 states, 8446 states have (on average 5.879706369879233) internal successors, (49660), 8446 states have internal predecessors, (49660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 49660 transitions. [2021-06-30 11:47:40,962 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 49660 transitions. Word has length 23 [2021-06-30 11:47:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:40,962 INFO L482 AbstractCegarLoop]: Abstraction has 8447 states and 49660 transitions. [2021-06-30 11:47:40,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 49660 transitions. [2021-06-30 11:47:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:40,986 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:40,986 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:40,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-30 11:47:40,987 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:40,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1543801715, now seen corresponding path program 1 times [2021-06-30 11:47:40,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:40,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049168035] [2021-06-30 11:47:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:41,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:41,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049168035] [2021-06-30 11:47:41,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049168035] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:41,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:41,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:41,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413811886] [2021-06-30 11:47:41,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:41,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:41,044 INFO L87 Difference]: Start difference. First operand 8447 states and 49660 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:41,374 INFO L93 Difference]: Finished difference Result 10933 states and 63962 transitions. [2021-06-30 11:47:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:41,434 INFO L225 Difference]: With dead ends: 10933 [2021-06-30 11:47:41,434 INFO L226 Difference]: Without dead ends: 10917 [2021-06-30 11:47:41,435 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2021-06-30 11:47:41,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 8647. [2021-06-30 11:47:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8647 states, 8646 states have (on average 5.8867684478371505) internal successors, (50897), 8646 states have internal predecessors, (50897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8647 states to 8647 states and 50897 transitions. [2021-06-30 11:47:42,022 INFO L78 Accepts]: Start accepts. Automaton has 8647 states and 50897 transitions. Word has length 26 [2021-06-30 11:47:42,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:42,022 INFO L482 AbstractCegarLoop]: Abstraction has 8647 states and 50897 transitions. [2021-06-30 11:47:42,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 8647 states and 50897 transitions. [2021-06-30 11:47:42,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:42,044 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:42,044 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:42,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-30 11:47:42,045 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:42,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1832450351, now seen corresponding path program 2 times [2021-06-30 11:47:42,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:42,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946355824] [2021-06-30 11:47:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:42,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:42,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946355824] [2021-06-30 11:47:42,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946355824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:42,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760699626] [2021-06-30 11:47:42,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-30 11:47:42,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:42,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:42,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:42,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:42,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760699626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:42,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:42,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:42,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258252363] [2021-06-30 11:47:42,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:42,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:42,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:42,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:42,317 INFO L87 Difference]: Start difference. First operand 8647 states and 50897 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:42,569 INFO L93 Difference]: Finished difference Result 11555 states and 67659 transitions. [2021-06-30 11:47:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:42,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:42,672 INFO L225 Difference]: With dead ends: 11555 [2021-06-30 11:47:42,672 INFO L226 Difference]: Without dead ends: 11457 [2021-06-30 11:47:42,673 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11457 states. [2021-06-30 11:47:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11457 to 8534. [2021-06-30 11:47:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 8533 states have (on average 5.866752607523732) internal successors, (50061), 8533 states have internal predecessors, (50061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 50061 transitions. [2021-06-30 11:47:43,275 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 50061 transitions. Word has length 26 [2021-06-30 11:47:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:43,275 INFO L482 AbstractCegarLoop]: Abstraction has 8534 states and 50061 transitions. [2021-06-30 11:47:43,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 50061 transitions. [2021-06-30 11:47:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:43,296 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:43,297 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:43,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-06-30 11:47:43,498 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:43,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1609642313, now seen corresponding path program 1 times [2021-06-30 11:47:43,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:43,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227339194] [2021-06-30 11:47:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:43,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:43,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227339194] [2021-06-30 11:47:43,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227339194] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:43,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:43,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:43,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489344846] [2021-06-30 11:47:43,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:43,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:43,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:43,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:43,543 INFO L87 Difference]: Start difference. First operand 8534 states and 50061 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:43,888 INFO L93 Difference]: Finished difference Result 11604 states and 67801 transitions. [2021-06-30 11:47:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:44,003 INFO L225 Difference]: With dead ends: 11604 [2021-06-30 11:47:44,003 INFO L226 Difference]: Without dead ends: 11577 [2021-06-30 11:47:44,004 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11577 states. [2021-06-30 11:47:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11577 to 8856. [2021-06-30 11:47:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8856 states, 8855 states have (on average 5.888311688311688) internal successors, (52141), 8855 states have internal predecessors, (52141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8856 states to 8856 states and 52141 transitions. [2021-06-30 11:47:44,587 INFO L78 Accepts]: Start accepts. Automaton has 8856 states and 52141 transitions. Word has length 26 [2021-06-30 11:47:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:44,587 INFO L482 AbstractCegarLoop]: Abstraction has 8856 states and 52141 transitions. [2021-06-30 11:47:44,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 8856 states and 52141 transitions. [2021-06-30 11:47:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:44,618 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:44,618 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:44,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-30 11:47:44,618 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:44,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1680353837, now seen corresponding path program 1 times [2021-06-30 11:47:44,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:44,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976761385] [2021-06-30 11:47:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:44,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:44,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976761385] [2021-06-30 11:47:44,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976761385] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:44,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:44,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:44,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104801001] [2021-06-30 11:47:44,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:44,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:44,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:44,664 INFO L87 Difference]: Start difference. First operand 8856 states and 52141 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:44,835 INFO L93 Difference]: Finished difference Result 11632 states and 68086 transitions. [2021-06-30 11:47:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:44,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:44,897 INFO L225 Difference]: With dead ends: 11632 [2021-06-30 11:47:44,898 INFO L226 Difference]: Without dead ends: 11588 [2021-06-30 11:47:44,898 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11588 states. [2021-06-30 11:47:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11588 to 9114. [2021-06-30 11:47:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9114 states, 9113 states have (on average 5.896301986173598) internal successors, (53733), 9113 states have internal predecessors, (53733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9114 states to 9114 states and 53733 transitions. [2021-06-30 11:47:45,450 INFO L78 Accepts]: Start accepts. Automaton has 9114 states and 53733 transitions. Word has length 26 [2021-06-30 11:47:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:45,450 INFO L482 AbstractCegarLoop]: Abstraction has 9114 states and 53733 transitions. [2021-06-30 11:47:45,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 9114 states and 53733 transitions. [2021-06-30 11:47:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:45,472 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:45,473 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:45,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-30 11:47:45,473 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash 715466293, now seen corresponding path program 1 times [2021-06-30 11:47:45,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:45,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724353202] [2021-06-30 11:47:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:45,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:45,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724353202] [2021-06-30 11:47:45,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724353202] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:45,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:45,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062150224] [2021-06-30 11:47:45,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:45,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:45,531 INFO L87 Difference]: Start difference. First operand 9114 states and 53733 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:45,709 INFO L93 Difference]: Finished difference Result 12016 states and 70429 transitions. [2021-06-30 11:47:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:45,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:45,765 INFO L225 Difference]: With dead ends: 12016 [2021-06-30 11:47:45,765 INFO L226 Difference]: Without dead ends: 11977 [2021-06-30 11:47:45,765 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2021-06-30 11:47:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 9283. [2021-06-30 11:47:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9283 states, 9282 states have (on average 5.904869640163758) internal successors, (54809), 9282 states have internal predecessors, (54809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 54809 transitions. [2021-06-30 11:47:46,230 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 54809 transitions. Word has length 26 [2021-06-30 11:47:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:46,230 INFO L482 AbstractCegarLoop]: Abstraction has 9283 states and 54809 transitions. [2021-06-30 11:47:46,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 54809 transitions. [2021-06-30 11:47:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:46,255 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:46,256 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:46,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-30 11:47:46,256 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:46,256 INFO L82 PathProgramCache]: Analyzing trace with hash 135710153, now seen corresponding path program 2 times [2021-06-30 11:47:46,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:46,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100804400] [2021-06-30 11:47:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:46,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:46,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100804400] [2021-06-30 11:47:46,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100804400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:46,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070255165] [2021-06-30 11:47:46,305 INFO L93 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 [2021-06-30 11:47:46,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:46,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:46,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:46,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:46,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070255165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:46,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:46,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:46,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21970750] [2021-06-30 11:47:46,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:46,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:46,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:46,469 INFO L87 Difference]: Start difference. First operand 9283 states and 54809 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:46,873 INFO L93 Difference]: Finished difference Result 12437 states and 72843 transitions. [2021-06-30 11:47:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:46,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:46,955 INFO L225 Difference]: With dead ends: 12437 [2021-06-30 11:47:46,956 INFO L226 Difference]: Without dead ends: 12381 [2021-06-30 11:47:46,956 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12381 states. [2021-06-30 11:47:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12381 to 9303. [2021-06-30 11:47:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 5.90217157600516) internal successors, (54902), 9302 states have internal predecessors, (54902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 54902 transitions. [2021-06-30 11:47:47,338 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 54902 transitions. Word has length 26 [2021-06-30 11:47:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:47,338 INFO L482 AbstractCegarLoop]: Abstraction has 9303 states and 54902 transitions. [2021-06-30 11:47:47,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 54902 transitions. [2021-06-30 11:47:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:47,513 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:47,514 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:47,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-30 11:47:47,714 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:47,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1474949549, now seen corresponding path program 2 times [2021-06-30 11:47:47,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:47,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846416094] [2021-06-30 11:47:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:47,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:47,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846416094] [2021-06-30 11:47:47,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846416094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:47,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66242151] [2021-06-30 11:47:47,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:47,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:47,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:47,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66242151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:47,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:47,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:47,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442561613] [2021-06-30 11:47:47,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:47,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:47,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:47,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:47,903 INFO L87 Difference]: Start difference. First operand 9303 states and 54902 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:48,118 INFO L93 Difference]: Finished difference Result 12068 states and 70827 transitions. [2021-06-30 11:47:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:48,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:48,172 INFO L225 Difference]: With dead ends: 12068 [2021-06-30 11:47:48,172 INFO L226 Difference]: Without dead ends: 11980 [2021-06-30 11:47:48,172 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11980 states. [2021-06-30 11:47:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11980 to 9301. [2021-06-30 11:47:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9301 states, 9300 states have (on average 5.899892473118279) internal successors, (54869), 9300 states have internal predecessors, (54869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 54869 transitions. [2021-06-30 11:47:48,668 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 54869 transitions. Word has length 26 [2021-06-30 11:47:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:48,668 INFO L482 AbstractCegarLoop]: Abstraction has 9301 states and 54869 transitions. [2021-06-30 11:47:48,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 54869 transitions. [2021-06-30 11:47:48,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:48,689 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:48,689 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:48,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-30 11:47:48,895 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:48,895 INFO L82 PathProgramCache]: Analyzing trace with hash -364376075, now seen corresponding path program 2 times [2021-06-30 11:47:48,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:48,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538167718] [2021-06-30 11:47:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:48,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:48,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538167718] [2021-06-30 11:47:48,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538167718] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:48,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:48,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:48,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146317663] [2021-06-30 11:47:48,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:48,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:48,936 INFO L87 Difference]: Start difference. First operand 9301 states and 54869 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:49,081 INFO L93 Difference]: Finished difference Result 11907 states and 70001 transitions. [2021-06-30 11:47:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:49,126 INFO L225 Difference]: With dead ends: 11907 [2021-06-30 11:47:49,126 INFO L226 Difference]: Without dead ends: 11891 [2021-06-30 11:47:49,127 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11891 states. [2021-06-30 11:47:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11891 to 9675. [2021-06-30 11:47:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9675 states, 9674 states have (on average 5.9181310729791194) internal successors, (57252), 9674 states have internal predecessors, (57252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9675 states to 9675 states and 57252 transitions. [2021-06-30 11:47:49,612 INFO L78 Accepts]: Start accepts. Automaton has 9675 states and 57252 transitions. Word has length 26 [2021-06-30 11:47:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:49,613 INFO L482 AbstractCegarLoop]: Abstraction has 9675 states and 57252 transitions. [2021-06-30 11:47:49,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 9675 states and 57252 transitions. [2021-06-30 11:47:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:49,637 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:49,637 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:49,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-30 11:47:49,637 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1431065905, now seen corresponding path program 3 times [2021-06-30 11:47:49,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:49,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438018193] [2021-06-30 11:47:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:49,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:49,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438018193] [2021-06-30 11:47:49,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438018193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:49,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421388480] [2021-06-30 11:47:49,694 INFO L93 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 [2021-06-30 11:47:49,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:49,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:49,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421388480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:49,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:49,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:49,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283368789] [2021-06-30 11:47:49,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:49,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:49,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:49,812 INFO L87 Difference]: Start difference. First operand 9675 states and 57252 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:49,995 INFO L93 Difference]: Finished difference Result 12723 states and 74840 transitions. [2021-06-30 11:47:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:50,043 INFO L225 Difference]: With dead ends: 12723 [2021-06-30 11:47:50,044 INFO L226 Difference]: Without dead ends: 12597 [2021-06-30 11:47:50,044 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12597 states. [2021-06-30 11:47:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12597 to 9310. [2021-06-30 11:47:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9310 states, 9309 states have (on average 5.897840799226555) internal successors, (54903), 9309 states have internal predecessors, (54903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9310 states to 9310 states and 54903 transitions. [2021-06-30 11:47:50,552 INFO L78 Accepts]: Start accepts. Automaton has 9310 states and 54903 transitions. Word has length 26 [2021-06-30 11:47:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:50,553 INFO L482 AbstractCegarLoop]: Abstraction has 9310 states and 54903 transitions. [2021-06-30 11:47:50,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 9310 states and 54903 transitions. [2021-06-30 11:47:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:50,576 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:50,576 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:50,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:50,777 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1335725409, now seen corresponding path program 1 times [2021-06-30 11:47:50,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:50,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017970517] [2021-06-30 11:47:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:50,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:50,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017970517] [2021-06-30 11:47:50,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017970517] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:50,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:50,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:50,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316696443] [2021-06-30 11:47:50,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:50,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:50,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:50,843 INFO L87 Difference]: Start difference. First operand 9310 states and 54903 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:51,227 INFO L93 Difference]: Finished difference Result 12896 states and 75744 transitions. [2021-06-30 11:47:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:51,292 INFO L225 Difference]: With dead ends: 12896 [2021-06-30 11:47:51,292 INFO L226 Difference]: Without dead ends: 12865 [2021-06-30 11:47:51,293 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12865 states. [2021-06-30 11:47:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12865 to 9911. [2021-06-30 11:47:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9911 states, 9910 states have (on average 5.947325933400606) internal successors, (58938), 9910 states have internal predecessors, (58938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9911 states to 9911 states and 58938 transitions. [2021-06-30 11:47:51,764 INFO L78 Accepts]: Start accepts. Automaton has 9911 states and 58938 transitions. Word has length 26 [2021-06-30 11:47:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:51,764 INFO L482 AbstractCegarLoop]: Abstraction has 9911 states and 58938 transitions. [2021-06-30 11:47:51,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9911 states and 58938 transitions. [2021-06-30 11:47:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:51,792 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:51,792 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:51,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-30 11:47:51,793 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1406436933, now seen corresponding path program 1 times [2021-06-30 11:47:51,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:51,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394977246] [2021-06-30 11:47:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:52,027 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-30 11:47:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:52,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:52,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394977246] [2021-06-30 11:47:52,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394977246] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:52,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:52,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:52,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97384561] [2021-06-30 11:47:52,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:52,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:52,034 INFO L87 Difference]: Start difference. First operand 9911 states and 58938 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:52,184 INFO L93 Difference]: Finished difference Result 13161 states and 77678 transitions. [2021-06-30 11:47:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:52,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:52,241 INFO L225 Difference]: With dead ends: 13161 [2021-06-30 11:47:52,242 INFO L226 Difference]: Without dead ends: 13113 [2021-06-30 11:47:52,242 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2021-06-30 11:47:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 10396. [2021-06-30 11:47:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10396 states, 10395 states have (on average 5.9676767676767675) internal successors, (62034), 10395 states have internal predecessors, (62034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10396 states to 10396 states and 62034 transitions. [2021-06-30 11:47:52,788 INFO L78 Accepts]: Start accepts. Automaton has 10396 states and 62034 transitions. Word has length 26 [2021-06-30 11:47:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:52,788 INFO L482 AbstractCegarLoop]: Abstraction has 10396 states and 62034 transitions. [2021-06-30 11:47:52,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 10396 states and 62034 transitions. [2021-06-30 11:47:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:52,818 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:52,818 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:52,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-30 11:47:52,818 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:52,819 INFO L82 PathProgramCache]: Analyzing trace with hash 441549389, now seen corresponding path program 1 times [2021-06-30 11:47:52,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:52,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167252546] [2021-06-30 11:47:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:52,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:52,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167252546] [2021-06-30 11:47:52,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167252546] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:52,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:52,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:52,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032588967] [2021-06-30 11:47:52,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:52,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:52,867 INFO L87 Difference]: Start difference. First operand 10396 states and 62034 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:53,041 INFO L93 Difference]: Finished difference Result 13868 states and 82153 transitions. [2021-06-30 11:47:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:53,110 INFO L225 Difference]: With dead ends: 13868 [2021-06-30 11:47:53,110 INFO L226 Difference]: Without dead ends: 13825 [2021-06-30 11:47:53,110 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-06-30 11:47:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 10850. [2021-06-30 11:47:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 10849 states have (on average 5.996405198635819) internal successors, (65055), 10849 states have internal predecessors, (65055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 65055 transitions. [2021-06-30 11:47:53,860 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 65055 transitions. Word has length 26 [2021-06-30 11:47:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:53,861 INFO L482 AbstractCegarLoop]: Abstraction has 10850 states and 65055 transitions. [2021-06-30 11:47:53,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 65055 transitions. [2021-06-30 11:47:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:53,894 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:53,895 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:53,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-30 11:47:53,895 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash -404790815, now seen corresponding path program 2 times [2021-06-30 11:47:53,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:53,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051666100] [2021-06-30 11:47:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:53,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051666100] [2021-06-30 11:47:53,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051666100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:53,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509688157] [2021-06-30 11:47:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-30 11:47:53,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:53,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:54,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:54,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509688157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:54,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:54,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:54,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469986988] [2021-06-30 11:47:54,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:54,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:54,066 INFO L87 Difference]: Start difference. First operand 10850 states and 65055 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:54,259 INFO L93 Difference]: Finished difference Result 14474 states and 85804 transitions. [2021-06-30 11:47:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:54,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:54,319 INFO L225 Difference]: With dead ends: 14474 [2021-06-30 11:47:54,319 INFO L226 Difference]: Without dead ends: 14415 [2021-06-30 11:47:54,319 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14415 states. [2021-06-30 11:47:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14415 to 10868. [2021-06-30 11:47:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10868 states, 10867 states have (on average 5.993558479801233) internal successors, (65132), 10867 states have internal predecessors, (65132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10868 states to 10868 states and 65132 transitions. [2021-06-30 11:47:54,985 INFO L78 Accepts]: Start accepts. Automaton has 10868 states and 65132 transitions. Word has length 26 [2021-06-30 11:47:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:54,985 INFO L482 AbstractCegarLoop]: Abstraction has 10868 states and 65132 transitions. [2021-06-30 11:47:54,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 10868 states and 65132 transitions. [2021-06-30 11:47:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:55,013 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:55,013 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:55,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:55,214 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash -338907707, now seen corresponding path program 2 times [2021-06-30 11:47:55,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:55,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761339865] [2021-06-30 11:47:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:55,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:55,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761339865] [2021-06-30 11:47:55,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761339865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:55,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831794921] [2021-06-30 11:47:55,289 INFO L93 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 [2021-06-30 11:47:55,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:55,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:55,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831794921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:55,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:55,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:55,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286805919] [2021-06-30 11:47:55,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:55,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:55,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:55,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:55,405 INFO L87 Difference]: Start difference. First operand 10868 states and 65132 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:55,936 INFO L93 Difference]: Finished difference Result 14063 states and 83524 transitions. [2021-06-30 11:47:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:55,993 INFO L225 Difference]: With dead ends: 14063 [2021-06-30 11:47:55,993 INFO L226 Difference]: Without dead ends: 13955 [2021-06-30 11:47:55,993 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13955 states. [2021-06-30 11:47:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13955 to 10859. [2021-06-30 11:47:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10859 states, 10858 states have (on average 5.991434886719469) internal successors, (65055), 10858 states have internal predecessors, (65055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10859 states to 10859 states and 65055 transitions. [2021-06-30 11:47:56,575 INFO L78 Accepts]: Start accepts. Automaton has 10859 states and 65055 transitions. Word has length 26 [2021-06-30 11:47:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:56,575 INFO L482 AbstractCegarLoop]: Abstraction has 10859 states and 65055 transitions. [2021-06-30 11:47:56,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 10859 states and 65055 transitions. [2021-06-30 11:47:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:56,607 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:56,607 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:56,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:56,833 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:56,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1505362359, now seen corresponding path program 2 times [2021-06-30 11:47:56,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:56,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296954445] [2021-06-30 11:47:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:56,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:56,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296954445] [2021-06-30 11:47:56,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296954445] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:56,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:56,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:56,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485617387] [2021-06-30 11:47:56,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:56,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:56,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:56,872 INFO L87 Difference]: Start difference. First operand 10859 states and 65055 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:57,032 INFO L93 Difference]: Finished difference Result 13764 states and 81950 transitions. [2021-06-30 11:47:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:57,087 INFO L225 Difference]: With dead ends: 13764 [2021-06-30 11:47:57,088 INFO L226 Difference]: Without dead ends: 13745 [2021-06-30 11:47:57,088 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13745 states. [2021-06-30 11:47:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13745 to 11274. [2021-06-30 11:47:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11274 states, 11273 states have (on average 6.003193471125699) internal successors, (67674), 11273 states have internal predecessors, (67674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11274 states to 11274 states and 67674 transitions. [2021-06-30 11:47:57,638 INFO L78 Accepts]: Start accepts. Automaton has 11274 states and 67674 transitions. Word has length 26 [2021-06-30 11:47:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:57,638 INFO L482 AbstractCegarLoop]: Abstraction has 11274 states and 67674 transitions. [2021-06-30 11:47:57,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 11274 states and 67674 transitions. [2021-06-30 11:47:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:57,667 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:57,667 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:57,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-30 11:47:57,667 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1117048973, now seen corresponding path program 3 times [2021-06-30 11:47:57,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:57,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953610308] [2021-06-30 11:47:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:57,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:57,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953610308] [2021-06-30 11:47:57,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953610308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:57,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894704722] [2021-06-30 11:47:57,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:47:57,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:57,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:57,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:57,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894704722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:57,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:57,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:57,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117709915] [2021-06-30 11:47:57,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:57,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:57,818 INFO L87 Difference]: Start difference. First operand 11274 states and 67674 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:58,013 INFO L93 Difference]: Finished difference Result 14786 states and 87925 transitions. [2021-06-30 11:47:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:58,074 INFO L225 Difference]: With dead ends: 14786 [2021-06-30 11:47:58,074 INFO L226 Difference]: Without dead ends: 14627 [2021-06-30 11:47:58,074 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14627 states. [2021-06-30 11:47:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14627 to 10861. [2021-06-30 11:47:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 5.98950276243094) internal successors, (65046), 10860 states have internal predecessors, (65046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 65046 transitions. [2021-06-30 11:47:58,681 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 65046 transitions. Word has length 26 [2021-06-30 11:47:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:58,681 INFO L482 AbstractCegarLoop]: Abstraction has 10861 states and 65046 transitions. [2021-06-30 11:47:58,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 65046 transitions. [2021-06-30 11:47:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:58,710 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:58,710 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:58,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:58,911 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:47:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash 472810897, now seen corresponding path program 1 times [2021-06-30 11:47:58,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:58,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569322745] [2021-06-30 11:47:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:58,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:58,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569322745] [2021-06-30 11:47:58,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569322745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:58,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854580032] [2021-06-30 11:47:58,980 INFO L95 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 [2021-06-30 11:47:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:59,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:59,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854580032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:59,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:59,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:59,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791467192] [2021-06-30 11:47:59,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:59,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:59,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:59,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:59,086 INFO L87 Difference]: Start difference. First operand 10861 states and 65046 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:59,275 INFO L93 Difference]: Finished difference Result 14236 states and 84519 transitions. [2021-06-30 11:47:59,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:59,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:47:59,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:59,541 INFO L225 Difference]: With dead ends: 14236 [2021-06-30 11:47:59,542 INFO L226 Difference]: Without dead ends: 14160 [2021-06-30 11:47:59,542 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2021-06-30 11:47:59,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 11280. [2021-06-30 11:47:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11280 states, 11279 states have (on average 6.00656086532494) internal successors, (67748), 11279 states have internal predecessors, (67748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11280 states to 11280 states and 67748 transitions. [2021-06-30 11:47:59,949 INFO L78 Accepts]: Start accepts. Automaton has 11280 states and 67748 transitions. Word has length 26 [2021-06-30 11:47:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:59,949 INFO L482 AbstractCegarLoop]: Abstraction has 11280 states and 67748 transitions. [2021-06-30 11:47:59,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 11280 states and 67748 transitions. [2021-06-30 11:47:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:47:59,978 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:59,979 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:00,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-30 11:48:00,179 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2080548297, now seen corresponding path program 1 times [2021-06-30 11:48:00,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:00,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112096564] [2021-06-30 11:48:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:00,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:00,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112096564] [2021-06-30 11:48:00,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112096564] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:00,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:00,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:00,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266889212] [2021-06-30 11:48:00,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:00,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:00,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:00,222 INFO L87 Difference]: Start difference. First operand 11280 states and 67748 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:00,583 INFO L93 Difference]: Finished difference Result 14779 states and 87965 transitions. [2021-06-30 11:48:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:00,661 INFO L225 Difference]: With dead ends: 14779 [2021-06-30 11:48:00,662 INFO L226 Difference]: Without dead ends: 14744 [2021-06-30 11:48:00,662 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14744 states. [2021-06-30 11:48:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14744 to 11646. [2021-06-30 11:48:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11646 states, 11645 states have (on average 6.03400601116359) internal successors, (70266), 11645 states have internal predecessors, (70266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11646 states to 11646 states and 70266 transitions. [2021-06-30 11:48:01,303 INFO L78 Accepts]: Start accepts. Automaton has 11646 states and 70266 transitions. Word has length 26 [2021-06-30 11:48:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:01,303 INFO L482 AbstractCegarLoop]: Abstraction has 11646 states and 70266 transitions. [2021-06-30 11:48:01,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 11646 states and 70266 transitions. [2021-06-30 11:48:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:01,334 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:01,335 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:01,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-30 11:48:01,335 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:01,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:01,335 INFO L82 PathProgramCache]: Analyzing trace with hash 229813491, now seen corresponding path program 2 times [2021-06-30 11:48:01,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:01,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172161739] [2021-06-30 11:48:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:01,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:01,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172161739] [2021-06-30 11:48:01,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172161739] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:01,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:01,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:01,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276740714] [2021-06-30 11:48:01,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:01,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:01,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:01,377 INFO L87 Difference]: Start difference. First operand 11646 states and 70266 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:01,528 INFO L93 Difference]: Finished difference Result 14642 states and 87659 transitions. [2021-06-30 11:48:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:01,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:01,588 INFO L225 Difference]: With dead ends: 14642 [2021-06-30 11:48:01,588 INFO L226 Difference]: Without dead ends: 14629 [2021-06-30 11:48:01,588 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14629 states. [2021-06-30 11:48:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14629 to 12001. [2021-06-30 11:48:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12001 states, 12000 states have (on average 6.05) internal successors, (72600), 12000 states have internal predecessors, (72600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12001 states to 12001 states and 72600 transitions. [2021-06-30 11:48:02,181 INFO L78 Accepts]: Start accepts. Automaton has 12001 states and 72600 transitions. Word has length 26 [2021-06-30 11:48:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:02,182 INFO L482 AbstractCegarLoop]: Abstraction has 12001 states and 72600 transitions. [2021-06-30 11:48:02,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 12001 states and 72600 transitions. [2021-06-30 11:48:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:02,215 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:02,215 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:02,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-30 11:48:02,215 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1850989623, now seen corresponding path program 3 times [2021-06-30 11:48:02,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:02,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394532559] [2021-06-30 11:48:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:02,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:02,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394532559] [2021-06-30 11:48:02,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394532559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:02,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775495686] [2021-06-30 11:48:02,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:48:02,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:02,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:02,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:48:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:02,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775495686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:02,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:02,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:48:02,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641527915] [2021-06-30 11:48:02,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:02,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:02,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:02,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:02,352 INFO L87 Difference]: Start difference. First operand 12001 states and 72600 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:02,584 INFO L93 Difference]: Finished difference Result 15724 states and 93980 transitions. [2021-06-30 11:48:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:02,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:02,646 INFO L225 Difference]: With dead ends: 15724 [2021-06-30 11:48:02,646 INFO L226 Difference]: Without dead ends: 15631 [2021-06-30 11:48:02,646 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15631 states. [2021-06-30 11:48:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15631 to 11660. [2021-06-30 11:48:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11660 states, 11659 states have (on average 6.030963204391457) internal successors, (70315), 11659 states have internal predecessors, (70315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11660 states to 11660 states and 70315 transitions. [2021-06-30 11:48:03,280 INFO L78 Accepts]: Start accepts. Automaton has 11660 states and 70315 transitions. Word has length 26 [2021-06-30 11:48:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:03,281 INFO L482 AbstractCegarLoop]: Abstraction has 11660 states and 70315 transitions. [2021-06-30 11:48:03,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 11660 states and 70315 transitions. [2021-06-30 11:48:03,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:03,308 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:03,308 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:03,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-30 11:48:03,509 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:03,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:03,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1933377185, now seen corresponding path program 1 times [2021-06-30 11:48:03,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:03,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991301823] [2021-06-30 11:48:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:03,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:03,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991301823] [2021-06-30 11:48:03,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991301823] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:03,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:03,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:03,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143282392] [2021-06-30 11:48:03,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:03,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:03,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:03,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:03,548 INFO L87 Difference]: Start difference. First operand 11660 states and 70315 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:03,711 INFO L93 Difference]: Finished difference Result 14918 states and 89061 transitions. [2021-06-30 11:48:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:03,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:03,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:03,988 INFO L225 Difference]: With dead ends: 14918 [2021-06-30 11:48:03,988 INFO L226 Difference]: Without dead ends: 14866 [2021-06-30 11:48:03,988 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14866 states. [2021-06-30 11:48:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14866 to 12013. [2021-06-30 11:48:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12013 states, 12012 states have (on average 6.03013653013653) internal successors, (72434), 12012 states have internal predecessors, (72434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12013 states to 12013 states and 72434 transitions. [2021-06-30 11:48:04,419 INFO L78 Accepts]: Start accepts. Automaton has 12013 states and 72434 transitions. Word has length 26 [2021-06-30 11:48:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:04,419 INFO L482 AbstractCegarLoop]: Abstraction has 12013 states and 72434 transitions. [2021-06-30 11:48:04,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 12013 states and 72434 transitions. [2021-06-30 11:48:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:04,453 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:04,453 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:04,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-30 11:48:04,453 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:04,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:04,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1096155421, now seen corresponding path program 2 times [2021-06-30 11:48:04,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:04,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336238663] [2021-06-30 11:48:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:04,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:04,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336238663] [2021-06-30 11:48:04,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336238663] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:04,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:04,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:04,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905537742] [2021-06-30 11:48:04,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:04,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:04,485 INFO L87 Difference]: Start difference. First operand 12013 states and 72434 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:04,832 INFO L93 Difference]: Finished difference Result 14702 states and 87989 transitions. [2021-06-30 11:48:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:04,894 INFO L225 Difference]: With dead ends: 14702 [2021-06-30 11:48:04,894 INFO L226 Difference]: Without dead ends: 14677 [2021-06-30 11:48:04,894 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14677 states. [2021-06-30 11:48:05,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14677 to 12384. [2021-06-30 11:48:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12384 states, 12383 states have (on average 6.0315755471210535) internal successors, (74689), 12383 states have internal predecessors, (74689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12384 states to 12384 states and 74689 transitions. [2021-06-30 11:48:05,516 INFO L78 Accepts]: Start accepts. Automaton has 12384 states and 74689 transitions. Word has length 26 [2021-06-30 11:48:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:05,517 INFO L482 AbstractCegarLoop]: Abstraction has 12384 states and 74689 transitions. [2021-06-30 11:48:05,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 12384 states and 74689 transitions. [2021-06-30 11:48:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:05,554 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:05,554 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:05,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-30 11:48:05,554 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1881445007, now seen corresponding path program 3 times [2021-06-30 11:48:05,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:05,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631919113] [2021-06-30 11:48:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:05,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:05,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631919113] [2021-06-30 11:48:05,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631919113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:05,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391053829] [2021-06-30 11:48:05,594 INFO L93 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 [2021-06-30 11:48:05,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:05,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:05,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:48:05,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:05,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391053829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:05,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:05,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:48:05,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537120922] [2021-06-30 11:48:05,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:05,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:05,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:05,720 INFO L87 Difference]: Start difference. First operand 12384 states and 74689 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:05,962 INFO L93 Difference]: Finished difference Result 15807 states and 94432 transitions. [2021-06-30 11:48:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:05,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:06,023 INFO L225 Difference]: With dead ends: 15807 [2021-06-30 11:48:06,023 INFO L226 Difference]: Without dead ends: 15606 [2021-06-30 11:48:06,023 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2021-06-30 11:48:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 11995. [2021-06-30 11:48:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11995 states, 11994 states have (on average 6.028180757045189) internal successors, (72302), 11994 states have internal predecessors, (72302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11995 states to 11995 states and 72302 transitions. [2021-06-30 11:48:06,623 INFO L78 Accepts]: Start accepts. Automaton has 11995 states and 72302 transitions. Word has length 26 [2021-06-30 11:48:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:06,623 INFO L482 AbstractCegarLoop]: Abstraction has 11995 states and 72302 transitions. [2021-06-30 11:48:06,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 11995 states and 72302 transitions. [2021-06-30 11:48:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:06,656 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:06,656 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:06,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:06,857 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:06,857 INFO L82 PathProgramCache]: Analyzing trace with hash 552954405, now seen corresponding path program 1 times [2021-06-30 11:48:06,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:06,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593498888] [2021-06-30 11:48:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:06,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:06,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593498888] [2021-06-30 11:48:06,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593498888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:06,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:06,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:06,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644821187] [2021-06-30 11:48:06,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:06,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:06,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:06,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:06,898 INFO L87 Difference]: Start difference. First operand 11995 states and 72302 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:07,054 INFO L93 Difference]: Finished difference Result 15375 states and 91696 transitions. [2021-06-30 11:48:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:07,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:07,119 INFO L225 Difference]: With dead ends: 15375 [2021-06-30 11:48:07,119 INFO L226 Difference]: Without dead ends: 15352 [2021-06-30 11:48:07,119 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15352 states. [2021-06-30 11:48:07,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15352 to 12166. [2021-06-30 11:48:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 6.027784628031237) internal successors, (73328), 12165 states have internal predecessors, (73328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 73328 transitions. [2021-06-30 11:48:07,766 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 73328 transitions. Word has length 26 [2021-06-30 11:48:07,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:07,766 INFO L482 AbstractCegarLoop]: Abstraction has 12166 states and 73328 transitions. [2021-06-30 11:48:07,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 73328 transitions. [2021-06-30 11:48:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:07,800 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:07,800 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:07,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-30 11:48:07,801 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:07,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1019703447, now seen corresponding path program 2 times [2021-06-30 11:48:07,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:07,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756259778] [2021-06-30 11:48:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:07,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:07,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756259778] [2021-06-30 11:48:07,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756259778] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:07,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:07,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:07,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911128739] [2021-06-30 11:48:07,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:07,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:07,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:07,835 INFO L87 Difference]: Start difference. First operand 12166 states and 73328 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:08,255 INFO L93 Difference]: Finished difference Result 15296 states and 91411 transitions. [2021-06-30 11:48:08,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:08,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:08,372 INFO L225 Difference]: With dead ends: 15296 [2021-06-30 11:48:08,373 INFO L226 Difference]: Without dead ends: 15280 [2021-06-30 11:48:08,374 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15280 states. [2021-06-30 11:48:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15280 to 12476. [2021-06-30 11:48:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12476 states, 12475 states have (on average 6.033587174348697) internal successors, (75269), 12475 states have internal predecessors, (75269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12476 states to 12476 states and 75269 transitions. [2021-06-30 11:48:08,971 INFO L78 Accepts]: Start accepts. Automaton has 12476 states and 75269 transitions. Word has length 26 [2021-06-30 11:48:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:08,971 INFO L482 AbstractCegarLoop]: Abstraction has 12476 states and 75269 transitions. [2021-06-30 11:48:08,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 12476 states and 75269 transitions. [2021-06-30 11:48:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:09,005 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:09,005 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:09,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-30 11:48:09,005 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2008763995, now seen corresponding path program 3 times [2021-06-30 11:48:09,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:09,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001358110] [2021-06-30 11:48:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:09,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001358110] [2021-06-30 11:48:09,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001358110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947251404] [2021-06-30 11:48:09,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:48:09,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:09,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:09,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:48:09,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:09,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947251404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:09,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:09,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:48:09,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322063094] [2021-06-30 11:48:09,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:09,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:09,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:09,348 INFO L87 Difference]: Start difference. First operand 12476 states and 75269 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:09,591 INFO L93 Difference]: Finished difference Result 16065 states and 95859 transitions. [2021-06-30 11:48:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:09,659 INFO L225 Difference]: With dead ends: 16065 [2021-06-30 11:48:09,659 INFO L226 Difference]: Without dead ends: 16015 [2021-06-30 11:48:09,660 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16015 states. [2021-06-30 11:48:10,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16015 to 12187. [2021-06-30 11:48:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12187 states, 12186 states have (on average 6.026095519448548) internal successors, (73434), 12186 states have internal predecessors, (73434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12187 states to 12187 states and 73434 transitions. [2021-06-30 11:48:10,329 INFO L78 Accepts]: Start accepts. Automaton has 12187 states and 73434 transitions. Word has length 26 [2021-06-30 11:48:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:10,330 INFO L482 AbstractCegarLoop]: Abstraction has 12187 states and 73434 transitions. [2021-06-30 11:48:10,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 12187 states and 73434 transitions. [2021-06-30 11:48:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:10,366 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:10,366 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:10,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-30 11:48:10,567 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash 651464973, now seen corresponding path program 1 times [2021-06-30 11:48:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:10,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714162924] [2021-06-30 11:48:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:10,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:10,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714162924] [2021-06-30 11:48:10,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714162924] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:10,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:10,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:10,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348365518] [2021-06-30 11:48:10,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:10,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:10,598 INFO L87 Difference]: Start difference. First operand 12187 states and 73434 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:10,758 INFO L93 Difference]: Finished difference Result 15851 states and 94616 transitions. [2021-06-30 11:48:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:10,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:10,819 INFO L225 Difference]: With dead ends: 15851 [2021-06-30 11:48:10,820 INFO L226 Difference]: Without dead ends: 15824 [2021-06-30 11:48:10,820 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2021-06-30 11:48:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 12567. [2021-06-30 11:48:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12567 states, 12566 states have (on average 6.044962597485278) internal successors, (75961), 12566 states have internal predecessors, (75961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12567 states to 12567 states and 75961 transitions. [2021-06-30 11:48:11,412 INFO L78 Accepts]: Start accepts. Automaton has 12567 states and 75961 transitions. Word has length 26 [2021-06-30 11:48:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:11,412 INFO L482 AbstractCegarLoop]: Abstraction has 12567 states and 75961 transitions. [2021-06-30 11:48:11,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 12567 states and 75961 transitions. [2021-06-30 11:48:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:11,449 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:11,449 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:11,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-30 11:48:11,450 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:11,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:11,450 INFO L82 PathProgramCache]: Analyzing trace with hash 762333009, now seen corresponding path program 2 times [2021-06-30 11:48:11,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:11,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689604401] [2021-06-30 11:48:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:11,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:11,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689604401] [2021-06-30 11:48:11,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689604401] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:11,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:11,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:11,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868685942] [2021-06-30 11:48:11,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:11,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:11,486 INFO L87 Difference]: Start difference. First operand 12567 states and 75961 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:11,660 INFO L93 Difference]: Finished difference Result 15730 states and 94308 transitions. [2021-06-30 11:48:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:11,727 INFO L225 Difference]: With dead ends: 15730 [2021-06-30 11:48:11,727 INFO L226 Difference]: Without dead ends: 15711 [2021-06-30 11:48:11,728 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15711 states. [2021-06-30 11:48:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15711 to 12874. [2021-06-30 11:48:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12874 states, 12873 states have (on average 6.053755923250214) internal successors, (77930), 12873 states have internal predecessors, (77930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12874 states to 12874 states and 77930 transitions. [2021-06-30 11:48:12,412 INFO L78 Accepts]: Start accepts. Automaton has 12874 states and 77930 transitions. Word has length 26 [2021-06-30 11:48:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:12,412 INFO L482 AbstractCegarLoop]: Abstraction has 12874 states and 77930 transitions. [2021-06-30 11:48:12,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 12874 states and 77930 transitions. [2021-06-30 11:48:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:12,448 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:12,448 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:12,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-30 11:48:12,448 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:12,448 INFO L82 PathProgramCache]: Analyzing trace with hash -268739955, now seen corresponding path program 3 times [2021-06-30 11:48:12,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:12,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599348396] [2021-06-30 11:48:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:12,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:12,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599348396] [2021-06-30 11:48:12,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599348396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:12,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626317441] [2021-06-30 11:48:12,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:48:12,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:12,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:48:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:12,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626317441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:12,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:12,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:48:12,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38693436] [2021-06-30 11:48:12,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:12,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:12,600 INFO L87 Difference]: Start difference. First operand 12874 states and 77930 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:12,989 INFO L93 Difference]: Finished difference Result 16663 states and 99682 transitions. [2021-06-30 11:48:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:13,064 INFO L225 Difference]: With dead ends: 16663 [2021-06-30 11:48:13,064 INFO L226 Difference]: Without dead ends: 16610 [2021-06-30 11:48:13,064 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:13,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16610 states. [2021-06-30 11:48:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16610 to 12586. [2021-06-30 11:48:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12586 states, 12585 states have (on average 6.0433055224473575) internal successors, (76055), 12585 states have internal predecessors, (76055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12586 states to 12586 states and 76055 transitions. [2021-06-30 11:48:13,747 INFO L78 Accepts]: Start accepts. Automaton has 12586 states and 76055 transitions. Word has length 26 [2021-06-30 11:48:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:13,747 INFO L482 AbstractCegarLoop]: Abstraction has 12586 states and 76055 transitions. [2021-06-30 11:48:13,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 12586 states and 76055 transitions. [2021-06-30 11:48:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:13,780 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:13,780 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:13,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-30 11:48:13,981 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:13,981 INFO L82 PathProgramCache]: Analyzing trace with hash 503697925, now seen corresponding path program 1 times [2021-06-30 11:48:13,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:13,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124177236] [2021-06-30 11:48:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:14,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:14,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124177236] [2021-06-30 11:48:14,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124177236] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:14,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:14,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:14,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257641421] [2021-06-30 11:48:14,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:14,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:14,031 INFO L87 Difference]: Start difference. First operand 12586 states and 76055 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:14,194 INFO L93 Difference]: Finished difference Result 16281 states and 97283 transitions. [2021-06-30 11:48:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:14,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:14,258 INFO L225 Difference]: With dead ends: 16281 [2021-06-30 11:48:14,258 INFO L226 Difference]: Without dead ends: 16262 [2021-06-30 11:48:14,258 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16262 states. [2021-06-30 11:48:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16262 to 12949. [2021-06-30 11:48:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12949 states, 12948 states have (on average 6.054371331479765) internal successors, (78392), 12948 states have internal predecessors, (78392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12949 states to 12949 states and 78392 transitions. [2021-06-30 11:48:14,900 INFO L78 Accepts]: Start accepts. Automaton has 12949 states and 78392 transitions. Word has length 26 [2021-06-30 11:48:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:14,900 INFO L482 AbstractCegarLoop]: Abstraction has 12949 states and 78392 transitions. [2021-06-30 11:48:14,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 12949 states and 78392 transitions. [2021-06-30 11:48:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:14,937 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:14,937 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:14,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-30 11:48:14,937 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:14,938 INFO L82 PathProgramCache]: Analyzing trace with hash 214911749, now seen corresponding path program 2 times [2021-06-30 11:48:14,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:14,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932834982] [2021-06-30 11:48:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:14,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:14,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932834982] [2021-06-30 11:48:14,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932834982] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:14,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:14,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:14,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108685285] [2021-06-30 11:48:14,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:14,970 INFO L87 Difference]: Start difference. First operand 12949 states and 78392 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:15,182 INFO L93 Difference]: Finished difference Result 16206 states and 97162 transitions. [2021-06-30 11:48:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:15,257 INFO L225 Difference]: With dead ends: 16206 [2021-06-30 11:48:15,257 INFO L226 Difference]: Without dead ends: 16193 [2021-06-30 11:48:15,257 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16193 states. [2021-06-30 11:48:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16193 to 13292. [2021-06-30 11:48:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13292 states, 13291 states have (on average 6.059438717929426) internal successors, (80536), 13291 states have internal predecessors, (80536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13292 states to 13292 states and 80536 transitions. [2021-06-30 11:48:15,928 INFO L78 Accepts]: Start accepts. Automaton has 13292 states and 80536 transitions. Word has length 26 [2021-06-30 11:48:15,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:15,928 INFO L482 AbstractCegarLoop]: Abstraction has 13292 states and 80536 transitions. [2021-06-30 11:48:15,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 13292 states and 80536 transitions. [2021-06-30 11:48:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:15,963 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:15,963 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:15,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-30 11:48:15,963 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:15,963 INFO L82 PathProgramCache]: Analyzing trace with hash -900186047, now seen corresponding path program 3 times [2021-06-30 11:48:15,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:15,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80764090] [2021-06-30 11:48:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:15,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:15,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80764090] [2021-06-30 11:48:15,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80764090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:15,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573607633] [2021-06-30 11:48:15,999 INFO L93 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 [2021-06-30 11:48:16,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:16,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:16,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:48:16,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:16,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573607633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:16,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:16,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:48:16,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409128233] [2021-06-30 11:48:16,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:16,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:16,079 INFO L87 Difference]: Start difference. First operand 13292 states and 80536 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:16,513 INFO L93 Difference]: Finished difference Result 17219 states and 102989 transitions. [2021-06-30 11:48:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:16,610 INFO L225 Difference]: With dead ends: 17219 [2021-06-30 11:48:16,610 INFO L226 Difference]: Without dead ends: 17172 [2021-06-30 11:48:16,610 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17172 states. [2021-06-30 11:48:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17172 to 12955. [2021-06-30 11:48:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12955 states, 12954 states have (on average 6.0556584838659875) internal successors, (78445), 12954 states have internal predecessors, (78445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12955 states to 12955 states and 78445 transitions. [2021-06-30 11:48:17,066 INFO L78 Accepts]: Start accepts. Automaton has 12955 states and 78445 transitions. Word has length 26 [2021-06-30 11:48:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:17,066 INFO L482 AbstractCegarLoop]: Abstraction has 12955 states and 78445 transitions. [2021-06-30 11:48:17,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 12955 states and 78445 transitions. [2021-06-30 11:48:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:17,100 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:17,101 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:17,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-30 11:48:17,301 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash -896681751, now seen corresponding path program 1 times [2021-06-30 11:48:17,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:17,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041502910] [2021-06-30 11:48:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:17,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:17,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041502910] [2021-06-30 11:48:17,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041502910] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:17,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:17,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:17,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558295250] [2021-06-30 11:48:17,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:17,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:17,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:17,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:17,332 INFO L87 Difference]: Start difference. First operand 12955 states and 78445 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:17,489 INFO L93 Difference]: Finished difference Result 16251 states and 97436 transitions. [2021-06-30 11:48:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:17,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:17,551 INFO L225 Difference]: With dead ends: 16251 [2021-06-30 11:48:17,552 INFO L226 Difference]: Without dead ends: 16215 [2021-06-30 11:48:17,552 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16215 states. [2021-06-30 11:48:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16215 to 13167. [2021-06-30 11:48:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13167 states, 13166 states have (on average 6.056053471061826) internal successors, (79734), 13166 states have internal predecessors, (79734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13167 states to 13167 states and 79734 transitions. [2021-06-30 11:48:18,166 INFO L78 Accepts]: Start accepts. Automaton has 13167 states and 79734 transitions. Word has length 26 [2021-06-30 11:48:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:18,167 INFO L482 AbstractCegarLoop]: Abstraction has 13167 states and 79734 transitions. [2021-06-30 11:48:18,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 13167 states and 79734 transitions. [2021-06-30 11:48:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:18,198 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:18,198 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:18,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-30 11:48:18,199 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:18,199 INFO L82 PathProgramCache]: Analyzing trace with hash 409350633, now seen corresponding path program 2 times [2021-06-30 11:48:18,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:18,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718494447] [2021-06-30 11:48:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:18,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:18,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718494447] [2021-06-30 11:48:18,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718494447] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:18,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:18,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:18,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806421169] [2021-06-30 11:48:18,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:18,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:18,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:18,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:18,229 INFO L87 Difference]: Start difference. First operand 13167 states and 79734 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:18,390 INFO L93 Difference]: Finished difference Result 15879 states and 95502 transitions. [2021-06-30 11:48:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:18,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:18,454 INFO L225 Difference]: With dead ends: 15879 [2021-06-30 11:48:18,454 INFO L226 Difference]: Without dead ends: 15854 [2021-06-30 11:48:18,454 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15854 states. [2021-06-30 11:48:18,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15854 to 13377. [2021-06-30 11:48:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13377 states, 13376 states have (on average 6.060481459330144) internal successors, (81065), 13376 states have internal predecessors, (81065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13377 states to 13377 states and 81065 transitions. [2021-06-30 11:48:19,075 INFO L78 Accepts]: Start accepts. Automaton has 13377 states and 81065 transitions. Word has length 26 [2021-06-30 11:48:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:19,075 INFO L482 AbstractCegarLoop]: Abstraction has 13377 states and 81065 transitions. [2021-06-30 11:48:19,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 13377 states and 81065 transitions. [2021-06-30 11:48:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:19,111 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:19,111 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:19,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-30 11:48:19,111 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:19,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:19,111 INFO L82 PathProgramCache]: Analyzing trace with hash -537697499, now seen corresponding path program 3 times [2021-06-30 11:48:19,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:19,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616897416] [2021-06-30 11:48:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:19,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:19,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616897416] [2021-06-30 11:48:19,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616897416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:19,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894301374] [2021-06-30 11:48:19,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:48:19,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:19,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:19,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:48:19,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:19,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894301374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:19,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:19,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:48:19,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090131512] [2021-06-30 11:48:19,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:19,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:19,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:19,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:19,257 INFO L87 Difference]: Start difference. First operand 13377 states and 81065 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:19,441 INFO L93 Difference]: Finished difference Result 16860 states and 101184 transitions. [2021-06-30 11:48:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:19,509 INFO L225 Difference]: With dead ends: 16860 [2021-06-30 11:48:19,510 INFO L226 Difference]: Without dead ends: 16796 [2021-06-30 11:48:19,510 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16796 states. [2021-06-30 11:48:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16796 to 13171. [2021-06-30 11:48:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13171 states, 13170 states have (on average 6.053910402429764) internal successors, (79730), 13170 states have internal predecessors, (79730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13171 states to 13171 states and 79730 transitions. [2021-06-30 11:48:20,264 INFO L78 Accepts]: Start accepts. Automaton has 13171 states and 79730 transitions. Word has length 26 [2021-06-30 11:48:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:20,264 INFO L482 AbstractCegarLoop]: Abstraction has 13171 states and 79730 transitions. [2021-06-30 11:48:20,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 13171 states and 79730 transitions. [2021-06-30 11:48:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:20,299 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:20,299 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:20,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:20,500 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash 288190449, now seen corresponding path program 1 times [2021-06-30 11:48:20,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:20,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319247205] [2021-06-30 11:48:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:20,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:20,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319247205] [2021-06-30 11:48:20,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319247205] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:20,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:20,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:48:20,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269698127] [2021-06-30 11:48:20,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:48:20,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:20,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:48:20,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:20,542 INFO L87 Difference]: Start difference. First operand 13171 states and 79730 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:20,977 INFO L93 Difference]: Finished difference Result 16723 states and 100428 transitions. [2021-06-30 11:48:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:48:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:21,049 INFO L225 Difference]: With dead ends: 16723 [2021-06-30 11:48:21,050 INFO L226 Difference]: Without dead ends: 16692 [2021-06-30 11:48:21,050 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:48:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16692 states. [2021-06-30 11:48:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16692 to 13349. [2021-06-30 11:48:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13349 states, 13348 states have (on average 6.063904704824693) internal successors, (80941), 13348 states have internal predecessors, (80941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13349 states to 13349 states and 80941 transitions. [2021-06-30 11:48:21,740 INFO L78 Accepts]: Start accepts. Automaton has 13349 states and 80941 transitions. Word has length 26 [2021-06-30 11:48:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:21,740 INFO L482 AbstractCegarLoop]: Abstraction has 13349 states and 80941 transitions. [2021-06-30 11:48:21,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 13349 states and 80941 transitions. [2021-06-30 11:48:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-30 11:48:21,777 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:21,777 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:21,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-30 11:48:21,777 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:21,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1196566769, now seen corresponding path program 2 times [2021-06-30 11:48:21,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:21,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547201863] [2021-06-30 11:48:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:21,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:21,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547201863] [2021-06-30 11:48:21,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547201863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:21,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034525642] [2021-06-30 11:48:21,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-30 11:48:21,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:21,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:21,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:48:21,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:21,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034525642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:21,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:21,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:48:21,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348260314] [2021-06-30 11:48:21,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:21,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:21,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:21,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:21,903 INFO L87 Difference]: Start difference. First operand 13349 states and 80941 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:22,121 INFO L93 Difference]: Finished difference Result 17276 states and 103712 transitions. [2021-06-30 11:48:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-30 11:48:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:22,183 INFO L225 Difference]: With dead ends: 17276 [2021-06-30 11:48:22,183 INFO L226 Difference]: Without dead ends: 17234 [2021-06-30 11:48:22,183 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17234 states. [2021-06-30 11:48:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17234 to 13364. [2021-06-30 11:48:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13364 states, 13363 states have (on average 6.061737633764873) internal successors, (81003), 13363 states have internal predecessors, (81003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13364 states to 13364 states and 81003 transitions. [2021-06-30 11:48:22,984 INFO L78 Accepts]: Start accepts. Automaton has 13364 states and 81003 transitions. Word has length 26 [2021-06-30 11:48:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:22,984 INFO L482 AbstractCegarLoop]: Abstraction has 13364 states and 81003 transitions. [2021-06-30 11:48:22,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 13364 states and 81003 transitions. [2021-06-30 11:48:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:23,029 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:23,029 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:23,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-30 11:48:23,230 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:23,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1856870833, now seen corresponding path program 1 times [2021-06-30 11:48:23,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:23,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442906177] [2021-06-30 11:48:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:23,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:23,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442906177] [2021-06-30 11:48:23,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442906177] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:23,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:23,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:23,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111245251] [2021-06-30 11:48:23,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:23,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:23,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:23,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:23,269 INFO L87 Difference]: Start difference. First operand 13364 states and 81003 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:23,464 INFO L93 Difference]: Finished difference Result 18084 states and 108589 transitions. [2021-06-30 11:48:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:23,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:23,543 INFO L225 Difference]: With dead ends: 18084 [2021-06-30 11:48:23,543 INFO L226 Difference]: Without dead ends: 18060 [2021-06-30 11:48:23,543 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18060 states. [2021-06-30 11:48:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18060 to 14409. [2021-06-30 11:48:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14409 states, 14408 states have (on average 6.104802887284841) internal successors, (87958), 14408 states have internal predecessors, (87958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14409 states to 14409 states and 87958 transitions. [2021-06-30 11:48:24,283 INFO L78 Accepts]: Start accepts. Automaton has 14409 states and 87958 transitions. Word has length 29 [2021-06-30 11:48:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:24,283 INFO L482 AbstractCegarLoop]: Abstraction has 14409 states and 87958 transitions. [2021-06-30 11:48:24,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 14409 states and 87958 transitions. [2021-06-30 11:48:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:24,323 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:24,323 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:24,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-30 11:48:24,323 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:24,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1927582357, now seen corresponding path program 1 times [2021-06-30 11:48:24,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:24,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215748791] [2021-06-30 11:48:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:24,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:24,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215748791] [2021-06-30 11:48:24,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215748791] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:24,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:24,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:24,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457096380] [2021-06-30 11:48:24,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:24,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:24,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:24,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:24,361 INFO L87 Difference]: Start difference. First operand 14409 states and 87958 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:24,759 INFO L93 Difference]: Finished difference Result 18681 states and 112672 transitions. [2021-06-30 11:48:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:24,840 INFO L225 Difference]: With dead ends: 18681 [2021-06-30 11:48:24,840 INFO L226 Difference]: Without dead ends: 18640 [2021-06-30 11:48:24,841 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-06-30 11:48:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 15167. [2021-06-30 11:48:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15167 states, 15166 states have (on average 6.125609916919425) internal successors, (92901), 15166 states have internal predecessors, (92901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15167 states to 15167 states and 92901 transitions. [2021-06-30 11:48:25,582 INFO L78 Accepts]: Start accepts. Automaton has 15167 states and 92901 transitions. Word has length 29 [2021-06-30 11:48:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:25,582 INFO L482 AbstractCegarLoop]: Abstraction has 15167 states and 92901 transitions. [2021-06-30 11:48:25,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 15167 states and 92901 transitions. [2021-06-30 11:48:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:25,626 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:25,626 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:25,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-30 11:48:25,626 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:25,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:25,626 INFO L82 PathProgramCache]: Analyzing trace with hash 962694813, now seen corresponding path program 1 times [2021-06-30 11:48:25,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:25,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776350627] [2021-06-30 11:48:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:25,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:25,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776350627] [2021-06-30 11:48:25,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776350627] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:25,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:25,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110933189] [2021-06-30 11:48:25,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:25,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:25,665 INFO L87 Difference]: Start difference. First operand 15167 states and 92901 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:25,866 INFO L93 Difference]: Finished difference Result 19760 states and 119606 transitions. [2021-06-30 11:48:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:25,950 INFO L225 Difference]: With dead ends: 19760 [2021-06-30 11:48:25,950 INFO L226 Difference]: Without dead ends: 19724 [2021-06-30 11:48:25,950 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19724 states. [2021-06-30 11:48:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19724 to 15910. [2021-06-30 11:48:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15910 states, 15909 states have (on average 6.155886605066315) internal successors, (97934), 15909 states have internal predecessors, (97934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15910 states to 15910 states and 97934 transitions. [2021-06-30 11:48:26,757 INFO L78 Accepts]: Start accepts. Automaton has 15910 states and 97934 transitions. Word has length 29 [2021-06-30 11:48:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:26,758 INFO L482 AbstractCegarLoop]: Abstraction has 15910 states and 97934 transitions. [2021-06-30 11:48:26,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15910 states and 97934 transitions. [2021-06-30 11:48:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:26,798 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:26,798 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:26,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-30 11:48:26,798 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:26,799 INFO L82 PathProgramCache]: Analyzing trace with hash 382938673, now seen corresponding path program 2 times [2021-06-30 11:48:26,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:26,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714488689] [2021-06-30 11:48:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:26,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:26,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714488689] [2021-06-30 11:48:26,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714488689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:26,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840602712] [2021-06-30 11:48:26,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:26,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:26,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:26,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:26,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840602712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:26,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:26,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:26,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387972999] [2021-06-30 11:48:26,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:26,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:26,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:26,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:26,950 INFO L87 Difference]: Start difference. First operand 15910 states and 97934 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:27,456 INFO L93 Difference]: Finished difference Result 20435 states and 123815 transitions. [2021-06-30 11:48:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:27,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:27,537 INFO L225 Difference]: With dead ends: 20435 [2021-06-30 11:48:27,537 INFO L226 Difference]: Without dead ends: 20379 [2021-06-30 11:48:27,537 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20379 states. [2021-06-30 11:48:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20379 to 15462. [2021-06-30 11:48:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15462 states, 15461 states have (on average 6.135049479335101) internal successors, (94854), 15461 states have internal predecessors, (94854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15462 states to 15462 states and 94854 transitions. [2021-06-30 11:48:28,245 INFO L78 Accepts]: Start accepts. Automaton has 15462 states and 94854 transitions. Word has length 29 [2021-06-30 11:48:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:28,246 INFO L482 AbstractCegarLoop]: Abstraction has 15462 states and 94854 transitions. [2021-06-30 11:48:28,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 15462 states and 94854 transitions. [2021-06-30 11:48:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:28,286 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:28,286 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:28,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:28,487 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:28,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1722178069, now seen corresponding path program 2 times [2021-06-30 11:48:28,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:28,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945490985] [2021-06-30 11:48:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:28,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:28,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945490985] [2021-06-30 11:48:28,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945490985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:28,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700476139] [2021-06-30 11:48:28,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-30 11:48:28,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:28,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:28,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:28,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700476139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:28,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:28,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:28,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898400161] [2021-06-30 11:48:28,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:28,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:28,651 INFO L87 Difference]: Start difference. First operand 15462 states and 94854 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:28,952 INFO L93 Difference]: Finished difference Result 19417 states and 117522 transitions. [2021-06-30 11:48:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:28,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:28,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:29,046 INFO L225 Difference]: With dead ends: 19417 [2021-06-30 11:48:29,047 INFO L226 Difference]: Without dead ends: 19329 [2021-06-30 11:48:29,047 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19329 states. [2021-06-30 11:48:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19329 to 15101. [2021-06-30 11:48:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15101 states, 15100 states have (on average 6.119801324503311) internal successors, (92409), 15100 states have internal predecessors, (92409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15101 states to 15101 states and 92409 transitions. [2021-06-30 11:48:30,012 INFO L78 Accepts]: Start accepts. Automaton has 15101 states and 92409 transitions. Word has length 29 [2021-06-30 11:48:30,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:30,012 INFO L482 AbstractCegarLoop]: Abstraction has 15101 states and 92409 transitions. [2021-06-30 11:48:30,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:30,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15101 states and 92409 transitions. [2021-06-30 11:48:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:30,050 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:30,050 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:30,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-30 11:48:30,251 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash -117147555, now seen corresponding path program 2 times [2021-06-30 11:48:30,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:30,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529858376] [2021-06-30 11:48:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:30,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:30,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529858376] [2021-06-30 11:48:30,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529858376] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:30,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:30,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:30,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948408826] [2021-06-30 11:48:30,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:30,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:30,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:30,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:30,291 INFO L87 Difference]: Start difference. First operand 15101 states and 92409 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:30,875 INFO L93 Difference]: Finished difference Result 19024 states and 115267 transitions. [2021-06-30 11:48:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:30,943 INFO L225 Difference]: With dead ends: 19024 [2021-06-30 11:48:30,943 INFO L226 Difference]: Without dead ends: 19008 [2021-06-30 11:48:30,944 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19008 states. [2021-06-30 11:48:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19008 to 15925. [2021-06-30 11:48:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15925 states, 15924 states have (on average 6.146131625219794) internal successors, (97871), 15924 states have internal predecessors, (97871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15925 states to 15925 states and 97871 transitions. [2021-06-30 11:48:31,657 INFO L78 Accepts]: Start accepts. Automaton has 15925 states and 97871 transitions. Word has length 29 [2021-06-30 11:48:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:31,657 INFO L482 AbstractCegarLoop]: Abstraction has 15925 states and 97871 transitions. [2021-06-30 11:48:31,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 15925 states and 97871 transitions. [2021-06-30 11:48:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:31,698 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:31,698 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:31,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-30 11:48:31,698 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1678294425, now seen corresponding path program 3 times [2021-06-30 11:48:31,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:31,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942918206] [2021-06-30 11:48:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:31,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:31,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942918206] [2021-06-30 11:48:31,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942918206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:31,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696262113] [2021-06-30 11:48:31,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:48:31,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:31,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:31,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696262113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:31,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:31,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:31,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293935661] [2021-06-30 11:48:31,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:31,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:31,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:31,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:31,835 INFO L87 Difference]: Start difference. First operand 15925 states and 97871 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:32,076 INFO L93 Difference]: Finished difference Result 20153 states and 122079 transitions. [2021-06-30 11:48:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:32,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:32,153 INFO L225 Difference]: With dead ends: 20153 [2021-06-30 11:48:32,153 INFO L226 Difference]: Without dead ends: 20027 [2021-06-30 11:48:32,153 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-06-30 11:48:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 14594. [2021-06-30 11:48:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14594 states, 14593 states have (on average 6.094977043788117) internal successors, (88944), 14593 states have internal predecessors, (88944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14594 states to 14594 states and 88944 transitions. [2021-06-30 11:48:32,938 INFO L78 Accepts]: Start accepts. Automaton has 14594 states and 88944 transitions. Word has length 29 [2021-06-30 11:48:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:32,938 INFO L482 AbstractCegarLoop]: Abstraction has 14594 states and 88944 transitions. [2021-06-30 11:48:32,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 14594 states and 88944 transitions. [2021-06-30 11:48:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:32,978 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:32,978 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:33,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-30 11:48:33,178 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:33,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1249882349, now seen corresponding path program 3 times [2021-06-30 11:48:33,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:33,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097145787] [2021-06-30 11:48:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:33,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:33,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097145787] [2021-06-30 11:48:33,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097145787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:33,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071591709] [2021-06-30 11:48:33,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:48:33,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:33,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:33,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:33,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:33,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071591709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:33,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:33,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:33,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39736223] [2021-06-30 11:48:33,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:33,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:33,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:33,529 INFO L87 Difference]: Start difference. First operand 14594 states and 88944 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:33,788 INFO L93 Difference]: Finished difference Result 20411 states and 123095 transitions. [2021-06-30 11:48:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:33,868 INFO L225 Difference]: With dead ends: 20411 [2021-06-30 11:48:33,868 INFO L226 Difference]: Without dead ends: 20305 [2021-06-30 11:48:33,868 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20305 states. [2021-06-30 11:48:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20305 to 15591. [2021-06-30 11:48:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15591 states, 15590 states have (on average 6.1216805644644) internal successors, (95437), 15590 states have internal predecessors, (95437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15591 states to 15591 states and 95437 transitions. [2021-06-30 11:48:34,561 INFO L78 Accepts]: Start accepts. Automaton has 15591 states and 95437 transitions. Word has length 29 [2021-06-30 11:48:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:34,561 INFO L482 AbstractCegarLoop]: Abstraction has 15591 states and 95437 transitions. [2021-06-30 11:48:34,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 15591 states and 95437 transitions. [2021-06-30 11:48:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:34,597 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:34,597 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:34,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:34,809 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1320593873, now seen corresponding path program 3 times [2021-06-30 11:48:34,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:34,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452706160] [2021-06-30 11:48:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:34,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:34,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452706160] [2021-06-30 11:48:34,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452706160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:34,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652059927] [2021-06-30 11:48:34,855 INFO L93 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 [2021-06-30 11:48:34,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:48:34,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:34,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652059927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:34,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:34,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:34,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165467417] [2021-06-30 11:48:34,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:34,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:34,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:34,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:34,962 INFO L87 Difference]: Start difference. First operand 15591 states and 95437 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:35,273 INFO L93 Difference]: Finished difference Result 21418 states and 129737 transitions. [2021-06-30 11:48:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:35,685 INFO L225 Difference]: With dead ends: 21418 [2021-06-30 11:48:35,685 INFO L226 Difference]: Without dead ends: 21295 [2021-06-30 11:48:35,685 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21295 states. [2021-06-30 11:48:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21295 to 16800. [2021-06-30 11:48:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16800 states, 16799 states have (on average 6.1540567890945885) internal successors, (103382), 16799 states have internal predecessors, (103382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16800 states to 16800 states and 103382 transitions. [2021-06-30 11:48:36,519 INFO L78 Accepts]: Start accepts. Automaton has 16800 states and 103382 transitions. Word has length 29 [2021-06-30 11:48:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:36,519 INFO L482 AbstractCegarLoop]: Abstraction has 16800 states and 103382 transitions. [2021-06-30 11:48:36,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 16800 states and 103382 transitions. [2021-06-30 11:48:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:36,561 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:36,561 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:36,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-30 11:48:36,762 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:36,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:36,762 INFO L82 PathProgramCache]: Analyzing trace with hash 355706329, now seen corresponding path program 4 times [2021-06-30 11:48:36,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:36,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085944499] [2021-06-30 11:48:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:36,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:36,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085944499] [2021-06-30 11:48:36,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085944499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:36,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843072960] [2021-06-30 11:48:36,809 INFO L93 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 [2021-06-30 11:48:36,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:36,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:36,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:36,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:36,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843072960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:36,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:36,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:36,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439558400] [2021-06-30 11:48:36,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:36,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:36,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:36,901 INFO L87 Difference]: Start difference. First operand 16800 states and 103382 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:37,187 INFO L93 Difference]: Finished difference Result 23075 states and 140141 transitions. [2021-06-30 11:48:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:37,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:37,281 INFO L225 Difference]: With dead ends: 23075 [2021-06-30 11:48:37,281 INFO L226 Difference]: Without dead ends: 22957 [2021-06-30 11:48:37,281 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22957 states. [2021-06-30 11:48:37,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22957 to 18007. [2021-06-30 11:48:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18007 states, 18006 states have (on average 6.196767744085305) internal successors, (111579), 18006 states have internal predecessors, (111579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18007 states to 18007 states and 111579 transitions. [2021-06-30 11:48:38,113 INFO L78 Accepts]: Start accepts. Automaton has 18007 states and 111579 transitions. Word has length 29 [2021-06-30 11:48:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:38,113 INFO L482 AbstractCegarLoop]: Abstraction has 18007 states and 111579 transitions. [2021-06-30 11:48:38,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 18007 states and 111579 transitions. [2021-06-30 11:48:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:38,162 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:38,162 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:38,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-30 11:48:38,363 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2030989775, now seen corresponding path program 4 times [2021-06-30 11:48:38,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:38,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536586182] [2021-06-30 11:48:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:38,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:38,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536586182] [2021-06-30 11:48:38,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536586182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:38,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453337975] [2021-06-30 11:48:38,418 INFO L93 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 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 [2021-06-30 11:48:38,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:38,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:38,696 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-30 11:48:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:38,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453337975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:38,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:38,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:38,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574763209] [2021-06-30 11:48:38,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:38,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:38,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:38,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:38,721 INFO L87 Difference]: Start difference. First operand 18007 states and 111579 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:39,063 INFO L93 Difference]: Finished difference Result 23700 states and 144108 transitions. [2021-06-30 11:48:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:39,163 INFO L225 Difference]: With dead ends: 23700 [2021-06-30 11:48:39,163 INFO L226 Difference]: Without dead ends: 23593 [2021-06-30 11:48:39,163 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23593 states. [2021-06-30 11:48:39,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23593 to 17512. [2021-06-30 11:48:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17512 states, 17511 states have (on average 6.1741191251213525) internal successors, (108115), 17511 states have internal predecessors, (108115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17512 states to 17512 states and 108115 transitions. [2021-06-30 11:48:39,984 INFO L78 Accepts]: Start accepts. Automaton has 17512 states and 108115 transitions. Word has length 29 [2021-06-30 11:48:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:39,984 INFO L482 AbstractCegarLoop]: Abstraction has 17512 states and 108115 transitions. [2021-06-30 11:48:39,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17512 states and 108115 transitions. [2021-06-30 11:48:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:40,031 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:40,031 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:40,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:40,232 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:40,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1965106667, now seen corresponding path program 4 times [2021-06-30 11:48:40,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:40,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993843478] [2021-06-30 11:48:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:40,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:40,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993843478] [2021-06-30 11:48:40,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993843478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:40,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641469528] [2021-06-30 11:48:40,286 INFO L93 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 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 [2021-06-30 11:48:40,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:48:40,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:40,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:40,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:40,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641469528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:40,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:40,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:40,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005337094] [2021-06-30 11:48:40,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:40,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:40,388 INFO L87 Difference]: Start difference. First operand 17512 states and 108115 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:41,068 INFO L93 Difference]: Finished difference Result 22489 states and 136723 transitions. [2021-06-30 11:48:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:41,190 INFO L225 Difference]: With dead ends: 22489 [2021-06-30 11:48:41,190 INFO L226 Difference]: Without dead ends: 22333 [2021-06-30 11:48:41,190 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22333 states. [2021-06-30 11:48:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22333 to 17084. [2021-06-30 11:48:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17084 states, 17083 states have (on average 6.160686062167066) internal successors, (105243), 17083 states have internal predecessors, (105243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17084 states to 17084 states and 105243 transitions. [2021-06-30 11:48:42,035 INFO L78 Accepts]: Start accepts. Automaton has 17084 states and 105243 transitions. Word has length 29 [2021-06-30 11:48:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:42,035 INFO L482 AbstractCegarLoop]: Abstraction has 17084 states and 105243 transitions. [2021-06-30 11:48:42,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:42,035 INFO L276 IsEmpty]: Start isEmpty. Operand 17084 states and 105243 transitions. [2021-06-30 11:48:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:42,082 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:42,082 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:42,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-30 11:48:42,304 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:42,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1163405977, now seen corresponding path program 5 times [2021-06-30 11:48:42,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:42,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788540091] [2021-06-30 11:48:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:42,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:42,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788540091] [2021-06-30 11:48:42,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788540091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:42,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246009405] [2021-06-30 11:48:42,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-06-30 11:48:42,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:42,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:42,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:42,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:48:42,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246009405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:42,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:42,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:42,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102303167] [2021-06-30 11:48:42,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:42,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:42,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:42,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:42,441 INFO L87 Difference]: Start difference. First operand 17084 states and 105243 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:42,722 INFO L93 Difference]: Finished difference Result 22280 states and 135446 transitions. [2021-06-30 11:48:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:48:42,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:43,062 INFO L225 Difference]: With dead ends: 22280 [2021-06-30 11:48:43,062 INFO L226 Difference]: Without dead ends: 22213 [2021-06-30 11:48:43,062 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22213 states. [2021-06-30 11:48:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22213 to 18265. [2021-06-30 11:48:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18265 states, 18264 states have (on average 6.178219448094612) internal successors, (112839), 18264 states have internal predecessors, (112839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18265 states to 18265 states and 112839 transitions. [2021-06-30 11:48:43,958 INFO L78 Accepts]: Start accepts. Automaton has 18265 states and 112839 transitions. Word has length 29 [2021-06-30 11:48:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:43,958 INFO L482 AbstractCegarLoop]: Abstraction has 18265 states and 112839 transitions. [2021-06-30 11:48:43,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18265 states and 112839 transitions. [2021-06-30 11:48:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:44,009 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:44,009 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:44,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:44,210 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:44,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:44,210 INFO L82 PathProgramCache]: Analyzing trace with hash -509149987, now seen corresponding path program 6 times [2021-06-30 11:48:44,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:44,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294663735] [2021-06-30 11:48:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:44,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:44,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294663735] [2021-06-30 11:48:44,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294663735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:44,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372919691] [2021-06-30 11:48:44,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-06-30 11:48:44,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:48:44,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:44,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:44,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:44,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372919691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:44,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:44,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:44,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50002419] [2021-06-30 11:48:44,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:44,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:44,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:44,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:44,354 INFO L87 Difference]: Start difference. First operand 18265 states and 112839 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:44,734 INFO L93 Difference]: Finished difference Result 23542 states and 143092 transitions. [2021-06-30 11:48:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:44,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:44,855 INFO L225 Difference]: With dead ends: 23542 [2021-06-30 11:48:44,855 INFO L226 Difference]: Without dead ends: 23335 [2021-06-30 11:48:44,856 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23335 states. [2021-06-30 11:48:45,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23335 to 16485. [2021-06-30 11:48:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16485 states, 16484 states have (on average 6.13728463965057) internal successors, (101167), 16484 states have internal predecessors, (101167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16485 states to 16485 states and 101167 transitions. [2021-06-30 11:48:45,757 INFO L78 Accepts]: Start accepts. Automaton has 16485 states and 101167 transitions. Word has length 29 [2021-06-30 11:48:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:45,757 INFO L482 AbstractCegarLoop]: Abstraction has 16485 states and 101167 transitions. [2021-06-30 11:48:45,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 16485 states and 101167 transitions. [2021-06-30 11:48:45,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:45,808 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:45,808 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:46,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-30 11:48:46,009 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:46,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:46,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1510874447, now seen corresponding path program 5 times [2021-06-30 11:48:46,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:46,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948436961] [2021-06-30 11:48:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:46,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:46,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948436961] [2021-06-30 11:48:46,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948436961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:46,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612955814] [2021-06-30 11:48:46,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-06-30 11:48:46,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-30 11:48:46,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:46,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:46,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612955814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:46,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:46,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:46,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38333070] [2021-06-30 11:48:46,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:46,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:46,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:46,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:46,364 INFO L87 Difference]: Start difference. First operand 16485 states and 101167 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:46,708 INFO L93 Difference]: Finished difference Result 21010 states and 126921 transitions. [2021-06-30 11:48:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:46,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:46,792 INFO L225 Difference]: With dead ends: 21010 [2021-06-30 11:48:46,793 INFO L226 Difference]: Without dead ends: 20970 [2021-06-30 11:48:46,793 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20970 states. [2021-06-30 11:48:47,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20970 to 16503. [2021-06-30 11:48:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16503 states, 16502 states have (on average 6.137013695309659) internal successors, (101273), 16502 states have internal predecessors, (101273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16503 states to 16503 states and 101273 transitions. [2021-06-30 11:48:47,519 INFO L78 Accepts]: Start accepts. Automaton has 16503 states and 101273 transitions. Word has length 29 [2021-06-30 11:48:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:47,519 INFO L482 AbstractCegarLoop]: Abstraction has 16503 states and 101273 transitions. [2021-06-30 11:48:47,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 16503 states and 101273 transitions. [2021-06-30 11:48:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:47,562 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:47,562 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:47,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-30 11:48:47,762 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash 973666285, now seen corresponding path program 6 times [2021-06-30 11:48:47,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:47,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659929862] [2021-06-30 11:48:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:47,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:47,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659929862] [2021-06-30 11:48:47,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659929862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:47,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521332207] [2021-06-30 11:48:47,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-06-30 11:48:47,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:48:47,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:47,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521332207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:47,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:47,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:47,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500063661] [2021-06-30 11:48:47,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:47,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:47,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:47,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:47,921 INFO L87 Difference]: Start difference. First operand 16503 states and 101273 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:48,548 INFO L93 Difference]: Finished difference Result 22081 states and 133945 transitions. [2021-06-30 11:48:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:48,686 INFO L225 Difference]: With dead ends: 22081 [2021-06-30 11:48:48,686 INFO L226 Difference]: Without dead ends: 22059 [2021-06-30 11:48:48,687 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22059 states. [2021-06-30 11:48:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22059 to 17709. [2021-06-30 11:48:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17709 states, 17708 states have (on average 6.181330472103005) internal successors, (109459), 17708 states have internal predecessors, (109459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17709 states to 17709 states and 109459 transitions. [2021-06-30 11:48:49,539 INFO L78 Accepts]: Start accepts. Automaton has 17709 states and 109459 transitions. Word has length 29 [2021-06-30 11:48:49,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:49,540 INFO L482 AbstractCegarLoop]: Abstraction has 17709 states and 109459 transitions. [2021-06-30 11:48:49,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 17709 states and 109459 transitions. [2021-06-30 11:48:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:49,591 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:49,591 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:49,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-30 11:48:49,791 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:49,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2032493805, now seen corresponding path program 7 times [2021-06-30 11:48:49,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:49,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952828462] [2021-06-30 11:48:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:49,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:49,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952828462] [2021-06-30 11:48:49,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952828462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:49,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94662647] [2021-06-30 11:48:49,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-06-30 11:48:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:49,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:49,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94662647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:49,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:49,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:49,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134822660] [2021-06-30 11:48:49,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:49,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:49,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:49,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:49,942 INFO L87 Difference]: Start difference. First operand 17709 states and 109459 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:50,344 INFO L93 Difference]: Finished difference Result 23995 states and 146519 transitions. [2021-06-30 11:48:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:50,453 INFO L225 Difference]: With dead ends: 23995 [2021-06-30 11:48:50,453 INFO L226 Difference]: Without dead ends: 23915 [2021-06-30 11:48:50,453 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23915 states. [2021-06-30 11:48:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23915 to 19424. [2021-06-30 11:48:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19424 states, 19423 states have (on average 6.225402872882665) internal successors, (120916), 19423 states have internal predecessors, (120916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19424 states to 19424 states and 120916 transitions. [2021-06-30 11:48:51,643 INFO L78 Accepts]: Start accepts. Automaton has 19424 states and 120916 transitions. Word has length 29 [2021-06-30 11:48:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:51,643 INFO L482 AbstractCegarLoop]: Abstraction has 19424 states and 120916 transitions. [2021-06-30 11:48:51,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 19424 states and 120916 transitions. [2021-06-30 11:48:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:51,698 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:51,698 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:51,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:51,899 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:51,899 INFO L82 PathProgramCache]: Analyzing trace with hash -516775531, now seen corresponding path program 5 times [2021-06-30 11:48:51,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:51,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236928512] [2021-06-30 11:48:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:51,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236928512] [2021-06-30 11:48:51,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236928512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820835205] [2021-06-30 11:48:51,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-06-30 11:48:52,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-30 11:48:52,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:52,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:52,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:52,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820835205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:52,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:52,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:52,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339484939] [2021-06-30 11:48:52,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:52,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:52,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:52,055 INFO L87 Difference]: Start difference. First operand 19424 states and 120916 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:52,388 INFO L93 Difference]: Finished difference Result 23193 states and 142361 transitions. [2021-06-30 11:48:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:52,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:52,489 INFO L225 Difference]: With dead ends: 23193 [2021-06-30 11:48:52,489 INFO L226 Difference]: Without dead ends: 23132 [2021-06-30 11:48:52,489 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23132 states. [2021-06-30 11:48:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23132 to 19438. [2021-06-30 11:48:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19438 states, 19437 states have (on average 6.225137624118949) internal successors, (120998), 19437 states have internal predecessors, (120998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19438 states to 19438 states and 120998 transitions. [2021-06-30 11:48:53,397 INFO L78 Accepts]: Start accepts. Automaton has 19438 states and 120998 transitions. Word has length 29 [2021-06-30 11:48:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:53,397 INFO L482 AbstractCegarLoop]: Abstraction has 19438 states and 120998 transitions. [2021-06-30 11:48:53,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 19438 states and 120998 transitions. [2021-06-30 11:48:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:53,671 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:53,671 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:53,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:53,896 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash 759551441, now seen corresponding path program 6 times [2021-06-30 11:48:53,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:53,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412205739] [2021-06-30 11:48:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:53,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:53,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412205739] [2021-06-30 11:48:53,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412205739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:53,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290405213] [2021-06-30 11:48:53,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-06-30 11:48:53,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:48:53,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:53,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:53,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:54,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290405213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:54,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:54,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:54,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394059223] [2021-06-30 11:48:54,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:54,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:54,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:54,024 INFO L87 Difference]: Start difference. First operand 19438 states and 120998 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:54,367 INFO L93 Difference]: Finished difference Result 23993 states and 147553 transitions. [2021-06-30 11:48:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:54,471 INFO L225 Difference]: With dead ends: 23993 [2021-06-30 11:48:54,471 INFO L226 Difference]: Without dead ends: 23959 [2021-06-30 11:48:54,471 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23959 states. [2021-06-30 11:48:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23959 to 20390. [2021-06-30 11:48:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20390 states, 20389 states have (on average 6.246603560743538) internal successors, (127362), 20389 states have internal predecessors, (127362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20390 states to 20390 states and 127362 transitions. [2021-06-30 11:48:55,374 INFO L78 Accepts]: Start accepts. Automaton has 20390 states and 127362 transitions. Word has length 29 [2021-06-30 11:48:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:55,374 INFO L482 AbstractCegarLoop]: Abstraction has 20390 states and 127362 transitions. [2021-06-30 11:48:55,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:55,374 INFO L276 IsEmpty]: Start isEmpty. Operand 20390 states and 127362 transitions. [2021-06-30 11:48:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:55,435 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:55,436 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:55,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:55,636 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:55,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1515774929, now seen corresponding path program 7 times [2021-06-30 11:48:55,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:55,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460820654] [2021-06-30 11:48:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:55,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:55,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460820654] [2021-06-30 11:48:55,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460820654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:55,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815853261] [2021-06-30 11:48:55,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-06-30 11:48:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:55,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:55,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:48:55,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815853261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:55,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:55,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:48:55,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123173840] [2021-06-30 11:48:55,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:48:55,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:55,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:48:55,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:55,975 INFO L87 Difference]: Start difference. First operand 20390 states and 127362 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:56,348 INFO L93 Difference]: Finished difference Result 25673 states and 158411 transitions. [2021-06-30 11:48:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:48:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:56,471 INFO L225 Difference]: With dead ends: 25673 [2021-06-30 11:48:56,471 INFO L226 Difference]: Without dead ends: 25593 [2021-06-30 11:48:56,472 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:48:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25593 states. [2021-06-30 11:48:57,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25593 to 21741. [2021-06-30 11:48:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21741 states, 21740 states have (on average 6.264627414903404) internal successors, (136193), 21740 states have internal predecessors, (136193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21741 states to 21741 states and 136193 transitions. [2021-06-30 11:48:57,430 INFO L78 Accepts]: Start accepts. Automaton has 21741 states and 136193 transitions. Word has length 29 [2021-06-30 11:48:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:57,430 INFO L482 AbstractCegarLoop]: Abstraction has 21741 states and 136193 transitions. [2021-06-30 11:48:57,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 21741 states and 136193 transitions. [2021-06-30 11:48:57,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:57,500 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:57,500 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:57,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:48:57,701 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -675097955, now seen corresponding path program 7 times [2021-06-30 11:48:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:57,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694882390] [2021-06-30 11:48:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:48:57,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:57,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694882390] [2021-06-30 11:48:57,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694882390] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:48:57,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:48:57,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:48:57,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47340104] [2021-06-30 11:48:57,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:48:57,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:57,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:48:57,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:57,745 INFO L87 Difference]: Start difference. First operand 21741 states and 136193 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:48:58,308 INFO L93 Difference]: Finished difference Result 24766 states and 153508 transitions. [2021-06-30 11:48:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:48:58,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:48:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:48:58,425 INFO L225 Difference]: With dead ends: 24766 [2021-06-30 11:48:58,425 INFO L226 Difference]: Without dead ends: 24750 [2021-06-30 11:48:58,425 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:48:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24750 states. [2021-06-30 11:48:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24750 to 22182. [2021-06-30 11:48:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22182 states, 22181 states have (on average 6.2744691402551735) internal successors, (139174), 22181 states have internal predecessors, (139174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22182 states to 22182 states and 139174 transitions. [2021-06-30 11:48:59,362 INFO L78 Accepts]: Start accepts. Automaton has 22182 states and 139174 transitions. Word has length 29 [2021-06-30 11:48:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:48:59,362 INFO L482 AbstractCegarLoop]: Abstraction has 22182 states and 139174 transitions. [2021-06-30 11:48:59,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:48:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 22182 states and 139174 transitions. [2021-06-30 11:48:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:48:59,428 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:48:59,428 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:48:59,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-30 11:48:59,428 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:48:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:48:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1154382631, now seen corresponding path program 8 times [2021-06-30 11:48:59,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:48:59,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367732241] [2021-06-30 11:48:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:48:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:48:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:59,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:48:59,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367732241] [2021-06-30 11:48:59,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367732241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:59,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413695472] [2021-06-30 11:48:59,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-30 11:48:59,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:48:59,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:48:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:48:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:48:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:48:59,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413695472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:48:59,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:48:59,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:48:59,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880251011] [2021-06-30 11:48:59,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:48:59,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:48:59,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:48:59,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:48:59,572 INFO L87 Difference]: Start difference. First operand 22182 states and 139174 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:00,314 INFO L93 Difference]: Finished difference Result 26561 states and 164145 transitions. [2021-06-30 11:49:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:00,435 INFO L225 Difference]: With dead ends: 26561 [2021-06-30 11:49:00,435 INFO L226 Difference]: Without dead ends: 26481 [2021-06-30 11:49:00,435 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:00,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26481 states. [2021-06-30 11:49:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26481 to 22456. [2021-06-30 11:49:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22456 states, 22455 states have (on average 6.274682698730795) internal successors, (140898), 22455 states have internal predecessors, (140898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22456 states to 22456 states and 140898 transitions. [2021-06-30 11:49:01,588 INFO L78 Accepts]: Start accepts. Automaton has 22456 states and 140898 transitions. Word has length 29 [2021-06-30 11:49:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:01,588 INFO L482 AbstractCegarLoop]: Abstraction has 22456 states and 140898 transitions. [2021-06-30 11:49:01,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 22456 states and 140898 transitions. [2021-06-30 11:49:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:01,661 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:01,661 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:01,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-30 11:49:01,862 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1874220583, now seen corresponding path program 9 times [2021-06-30 11:49:01,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:01,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532002663] [2021-06-30 11:49:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:01,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:01,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532002663] [2021-06-30 11:49:01,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532002663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:01,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969344046] [2021-06-30 11:49:01,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:49:01,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:49:01,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:01,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:01,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:02,253 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-30 11:49:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:02,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969344046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:02,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:02,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:02,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597262455] [2021-06-30 11:49:02,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:02,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:02,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:02,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:02,299 INFO L87 Difference]: Start difference. First operand 22456 states and 140898 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:02,704 INFO L93 Difference]: Finished difference Result 26576 states and 164937 transitions. [2021-06-30 11:49:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:02,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:02,816 INFO L225 Difference]: With dead ends: 26576 [2021-06-30 11:49:02,817 INFO L226 Difference]: Without dead ends: 26560 [2021-06-30 11:49:02,817 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-06-30 11:49:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 23448. [2021-06-30 11:49:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23448 states, 23447 states have (on average 6.295645498357999) internal successors, (147614), 23447 states have internal predecessors, (147614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23448 states to 23448 states and 147614 transitions. [2021-06-30 11:49:03,819 INFO L78 Accepts]: Start accepts. Automaton has 23448 states and 147614 transitions. Word has length 29 [2021-06-30 11:49:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:03,819 INFO L482 AbstractCegarLoop]: Abstraction has 23448 states and 147614 transitions. [2021-06-30 11:49:03,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 23448 states and 147614 transitions. [2021-06-30 11:49:04,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:04,098 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:04,098 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:04,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:04,328 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1503610919, now seen corresponding path program 10 times [2021-06-30 11:49:04,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:04,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901540221] [2021-06-30 11:49:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:04,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:04,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901540221] [2021-06-30 11:49:04,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901540221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:04,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125385870] [2021-06-30 11:49:04,377 INFO L93 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 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 [2021-06-30 11:49:04,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:04,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:04,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:04,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:04,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125385870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:04,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:04,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:04,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877009268] [2021-06-30 11:49:04,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:04,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:04,460 INFO L87 Difference]: Start difference. First operand 23448 states and 147614 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:04,827 INFO L93 Difference]: Finished difference Result 27582 states and 171105 transitions. [2021-06-30 11:49:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:04,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:04,944 INFO L225 Difference]: With dead ends: 27582 [2021-06-30 11:49:04,944 INFO L226 Difference]: Without dead ends: 27498 [2021-06-30 11:49:04,944 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27498 states. [2021-06-30 11:49:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27498 to 22760. [2021-06-30 11:49:05,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22760 states, 22759 states have (on average 6.282261962300629) internal successors, (142978), 22759 states have internal predecessors, (142978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22760 states to 22760 states and 142978 transitions. [2021-06-30 11:49:06,186 INFO L78 Accepts]: Start accepts. Automaton has 22760 states and 142978 transitions. Word has length 29 [2021-06-30 11:49:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:06,186 INFO L482 AbstractCegarLoop]: Abstraction has 22760 states and 142978 transitions. [2021-06-30 11:49:06,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 22760 states and 142978 transitions. [2021-06-30 11:49:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:06,259 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:06,259 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:06,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-30 11:49:06,460 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1983474453, now seen corresponding path program 11 times [2021-06-30 11:49:06,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:06,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463744261] [2021-06-30 11:49:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:06,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:06,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463744261] [2021-06-30 11:49:06,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463744261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:06,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441751184] [2021-06-30 11:49:06,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-06-30 11:49:06,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:49:06,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:06,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:06,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:06,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441751184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:06,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:06,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:06,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381823534] [2021-06-30 11:49:06,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:06,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:06,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:06,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:06,603 INFO L87 Difference]: Start difference. First operand 22760 states and 142978 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:06,965 INFO L93 Difference]: Finished difference Result 27694 states and 171496 transitions. [2021-06-30 11:49:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:06,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:07,089 INFO L225 Difference]: With dead ends: 27694 [2021-06-30 11:49:07,090 INFO L226 Difference]: Without dead ends: 27639 [2021-06-30 11:49:07,090 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:07,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27639 states. [2021-06-30 11:49:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27639 to 23116. [2021-06-30 11:49:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23116 states, 23115 states have (on average 6.285312567596798) internal successors, (145285), 23115 states have internal predecessors, (145285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23116 states to 23116 states and 145285 transitions. [2021-06-30 11:49:08,314 INFO L78 Accepts]: Start accepts. Automaton has 23116 states and 145285 transitions. Word has length 29 [2021-06-30 11:49:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:08,314 INFO L482 AbstractCegarLoop]: Abstraction has 23116 states and 145285 transitions. [2021-06-30 11:49:08,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 23116 states and 145285 transitions. [2021-06-30 11:49:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:08,375 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:08,375 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:08,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:08,576 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:08,576 INFO L82 PathProgramCache]: Analyzing trace with hash 974961753, now seen corresponding path program 12 times [2021-06-30 11:49:08,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:08,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208067391] [2021-06-30 11:49:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:08,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:08,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208067391] [2021-06-30 11:49:08,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208067391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:08,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144999813] [2021-06-30 11:49:08,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-06-30 11:49:08,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:49:08,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:08,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:08,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144999813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:08,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:08,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:08,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592678259] [2021-06-30 11:49:08,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:08,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:08,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:08,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:08,696 INFO L87 Difference]: Start difference. First operand 23116 states and 145285 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:09,071 INFO L93 Difference]: Finished difference Result 28680 states and 178131 transitions. [2021-06-30 11:49:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:09,467 INFO L225 Difference]: With dead ends: 28680 [2021-06-30 11:49:09,468 INFO L226 Difference]: Without dead ends: 28644 [2021-06-30 11:49:09,468 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28644 states. [2021-06-30 11:49:10,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28644 to 24702. [2021-06-30 11:49:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24702 states, 24701 states have (on average 6.312214080401604) internal successors, (155918), 24701 states have internal predecessors, (155918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24702 states to 24702 states and 155918 transitions. [2021-06-30 11:49:10,472 INFO L78 Accepts]: Start accepts. Automaton has 24702 states and 155918 transitions. Word has length 29 [2021-06-30 11:49:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:10,472 INFO L482 AbstractCegarLoop]: Abstraction has 24702 states and 155918 transitions. [2021-06-30 11:49:10,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 24702 states and 155918 transitions. [2021-06-30 11:49:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:10,545 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:10,545 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:10,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-30 11:49:10,746 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1983246967, now seen corresponding path program 8 times [2021-06-30 11:49:10,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:10,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995462886] [2021-06-30 11:49:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:10,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:10,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995462886] [2021-06-30 11:49:10,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995462886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:10,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807374552] [2021-06-30 11:49:10,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-06-30 11:49:10,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:10,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:10,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807374552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:10,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:10,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:10,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822745220] [2021-06-30 11:49:10,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:10,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:10,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:10,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:10,899 INFO L87 Difference]: Start difference. First operand 24702 states and 155918 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:11,519 INFO L93 Difference]: Finished difference Result 31154 states and 194473 transitions. [2021-06-30 11:49:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:11,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:11,668 INFO L225 Difference]: With dead ends: 31154 [2021-06-30 11:49:11,669 INFO L226 Difference]: Without dead ends: 31098 [2021-06-30 11:49:11,669 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31098 states. [2021-06-30 11:49:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31098 to 26595. [2021-06-30 11:49:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26595 states, 26594 states have (on average 6.35575693765511) internal successors, (169025), 26594 states have internal predecessors, (169025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26595 states to 26595 states and 169025 transitions. [2021-06-30 11:49:12,717 INFO L78 Accepts]: Start accepts. Automaton has 26595 states and 169025 transitions. Word has length 29 [2021-06-30 11:49:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:12,718 INFO L482 AbstractCegarLoop]: Abstraction has 26595 states and 169025 transitions. [2021-06-30 11:49:12,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26595 states and 169025 transitions. [2021-06-30 11:49:12,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:12,786 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:12,786 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:12,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:12,987 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:12,987 INFO L82 PathProgramCache]: Analyzing trace with hash -924419447, now seen corresponding path program 9 times [2021-06-30 11:49:12,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:12,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307233856] [2021-06-30 11:49:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:13,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:13,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307233856] [2021-06-30 11:49:13,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307233856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:13,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333702075] [2021-06-30 11:49:13,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:49:13,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-30 11:49:13,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:13,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:13,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:13,377 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-30 11:49:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333702075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:13,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:13,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:13,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646689687] [2021-06-30 11:49:13,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:13,406 INFO L87 Difference]: Start difference. First operand 26595 states and 169025 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:13,840 INFO L93 Difference]: Finished difference Result 33611 states and 210727 transitions. [2021-06-30 11:49:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:13,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:13,990 INFO L225 Difference]: With dead ends: 33611 [2021-06-30 11:49:13,991 INFO L226 Difference]: Without dead ends: 33579 [2021-06-30 11:49:13,991 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2021-06-30 11:49:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 28946. [2021-06-30 11:49:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28946 states, 28945 states have (on average 6.379720158922094) internal successors, (184661), 28945 states have internal predecessors, (184661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28946 states to 28946 states and 184661 transitions. [2021-06-30 11:49:15,363 INFO L78 Accepts]: Start accepts. Automaton has 28946 states and 184661 transitions. Word has length 29 [2021-06-30 11:49:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:15,363 INFO L482 AbstractCegarLoop]: Abstraction has 28946 states and 184661 transitions. [2021-06-30 11:49:15,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 28946 states and 184661 transitions. [2021-06-30 11:49:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:15,440 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:15,440 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:15,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:15,640 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:15,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:15,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2057157879, now seen corresponding path program 10 times [2021-06-30 11:49:15,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:15,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508606789] [2021-06-30 11:49:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:15,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:15,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508606789] [2021-06-30 11:49:15,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508606789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:15,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655589828] [2021-06-30 11:49:15,700 INFO L93 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 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 [2021-06-30 11:49:15,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:15,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:15,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:15,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:15,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655589828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:15,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:15,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:15,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312994894] [2021-06-30 11:49:15,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:15,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:15,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:15,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:15,785 INFO L87 Difference]: Start difference. First operand 28946 states and 184661 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:16,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:16,438 INFO L93 Difference]: Finished difference Result 35648 states and 223962 transitions. [2021-06-30 11:49:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:16,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:16,608 INFO L225 Difference]: With dead ends: 35648 [2021-06-30 11:49:16,608 INFO L226 Difference]: Without dead ends: 35526 [2021-06-30 11:49:16,609 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35526 states. [2021-06-30 11:49:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35526 to 30513. [2021-06-30 11:49:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30513 states, 30512 states have (on average 6.406626900891452) internal successors, (195479), 30512 states have internal predecessors, (195479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30513 states to 30513 states and 195479 transitions. [2021-06-30 11:49:18,023 INFO L78 Accepts]: Start accepts. Automaton has 30513 states and 195479 transitions. Word has length 29 [2021-06-30 11:49:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:18,023 INFO L482 AbstractCegarLoop]: Abstraction has 30513 states and 195479 transitions. [2021-06-30 11:49:18,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 30513 states and 195479 transitions. [2021-06-30 11:49:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:18,148 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:18,148 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:18,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:18,353 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1870052511, now seen corresponding path program 11 times [2021-06-30 11:49:18,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:18,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333545536] [2021-06-30 11:49:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:18,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:18,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333545536] [2021-06-30 11:49:18,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333545536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:18,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007586764] [2021-06-30 11:49:18,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-06-30 11:49:18,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:18,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:18,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007586764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:18,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:18,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:18,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457243585] [2021-06-30 11:49:18,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:18,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:18,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:18,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:18,513 INFO L87 Difference]: Start difference. First operand 30513 states and 195479 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:18,950 INFO L93 Difference]: Finished difference Result 39307 states and 248088 transitions. [2021-06-30 11:49:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:18,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:19,474 INFO L225 Difference]: With dead ends: 39307 [2021-06-30 11:49:19,474 INFO L226 Difference]: Without dead ends: 39153 [2021-06-30 11:49:19,474 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39153 states. [2021-06-30 11:49:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39153 to 33082. [2021-06-30 11:49:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33082 states, 33081 states have (on average 6.441280493334543) internal successors, (213084), 33081 states have internal predecessors, (213084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33082 states to 33082 states and 213084 transitions. [2021-06-30 11:49:20,782 INFO L78 Accepts]: Start accepts. Automaton has 33082 states and 213084 transitions. Word has length 29 [2021-06-30 11:49:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:20,783 INFO L482 AbstractCegarLoop]: Abstraction has 33082 states and 213084 transitions. [2021-06-30 11:49:20,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 33082 states and 213084 transitions. [2021-06-30 11:49:21,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:21,220 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:21,221 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:21,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:21,437 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1695390463, now seen corresponding path program 8 times [2021-06-30 11:49:21,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:21,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841026346] [2021-06-30 11:49:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:21,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:21,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841026346] [2021-06-30 11:49:21,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841026346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:21,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993963076] [2021-06-30 11:49:21,488 INFO L93 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 [2021-06-30 11:49:21,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:21,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:21,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:21,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993963076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:21,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:21,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:21,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501772656] [2021-06-30 11:49:21,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:21,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:21,567 INFO L87 Difference]: Start difference. First operand 33082 states and 213084 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:22,010 INFO L93 Difference]: Finished difference Result 38260 states and 243696 transitions. [2021-06-30 11:49:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:22,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:22,210 INFO L225 Difference]: With dead ends: 38260 [2021-06-30 11:49:22,210 INFO L226 Difference]: Without dead ends: 38175 [2021-06-30 11:49:22,210 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38175 states. [2021-06-30 11:49:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38175 to 34543. [2021-06-30 11:49:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34543 states, 34542 states have (on average 6.454490185860691) internal successors, (222951), 34542 states have internal predecessors, (222951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34543 states to 34543 states and 222951 transitions. [2021-06-30 11:49:23,780 INFO L78 Accepts]: Start accepts. Automaton has 34543 states and 222951 transitions. Word has length 29 [2021-06-30 11:49:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:23,780 INFO L482 AbstractCegarLoop]: Abstraction has 34543 states and 222951 transitions. [2021-06-30 11:49:23,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 34543 states and 222951 transitions. [2021-06-30 11:49:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:23,878 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:23,878 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:24,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-30 11:49:24,079 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash -939166975, now seen corresponding path program 9 times [2021-06-30 11:49:24,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:24,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428881977] [2021-06-30 11:49:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:24,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:24,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428881977] [2021-06-30 11:49:24,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428881977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:24,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781261081] [2021-06-30 11:49:24,124 INFO L93 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 [2021-06-30 11:49:24,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-30 11:49:24,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:24,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:24,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:24,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781261081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:24,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:24,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:24,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185831370] [2021-06-30 11:49:24,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:24,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:24,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:24,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:24,507 INFO L87 Difference]: Start difference. First operand 34543 states and 222951 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:25,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:25,019 INFO L93 Difference]: Finished difference Result 40034 states and 255208 transitions. [2021-06-30 11:49:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:25,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:25,208 INFO L225 Difference]: With dead ends: 40034 [2021-06-30 11:49:25,208 INFO L226 Difference]: Without dead ends: 40002 [2021-06-30 11:49:25,208 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40002 states. [2021-06-30 11:49:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40002 to 36179. [2021-06-30 11:49:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36179 states, 36178 states have (on average 6.463264967659904) internal successors, (233828), 36178 states have internal predecessors, (233828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36179 states to 36179 states and 233828 transitions. [2021-06-30 11:49:26,863 INFO L78 Accepts]: Start accepts. Automaton has 36179 states and 233828 transitions. Word has length 29 [2021-06-30 11:49:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:26,863 INFO L482 AbstractCegarLoop]: Abstraction has 36179 states and 233828 transitions. [2021-06-30 11:49:26,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 36179 states and 233828 transitions. [2021-06-30 11:49:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:26,983 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:26,983 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:27,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:27,184 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:27,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1389239169, now seen corresponding path program 10 times [2021-06-30 11:49:27,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:27,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251495201] [2021-06-30 11:49:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:27,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:27,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251495201] [2021-06-30 11:49:27,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251495201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:27,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869106063] [2021-06-30 11:49:27,233 INFO L93 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 [2021-06-30 11:49:27,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:27,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:27,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:27,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:27,588 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-30 11:49:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:27,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869106063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:27,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:27,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:27,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283283155] [2021-06-30 11:49:27,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:27,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:27,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:27,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:27,631 INFO L87 Difference]: Start difference. First operand 36179 states and 233828 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:28,127 INFO L93 Difference]: Finished difference Result 41670 states and 265788 transitions. [2021-06-30 11:49:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:28,328 INFO L225 Difference]: With dead ends: 41670 [2021-06-30 11:49:28,328 INFO L226 Difference]: Without dead ends: 41548 [2021-06-30 11:49:28,328 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41548 states. [2021-06-30 11:49:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41548 to 37495. [2021-06-30 11:49:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37495 states, 37494 states have (on average 6.47114204939457) internal successors, (242629), 37494 states have internal predecessors, (242629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37495 states to 37495 states and 242629 transitions. [2021-06-30 11:49:30,003 INFO L78 Accepts]: Start accepts. Automaton has 37495 states and 242629 transitions. Word has length 29 [2021-06-30 11:49:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:30,003 INFO L482 AbstractCegarLoop]: Abstraction has 37495 states and 242629 transitions. [2021-06-30 11:49:30,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 37495 states and 242629 transitions. [2021-06-30 11:49:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:30,453 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:30,453 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:30,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:30,669 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1999945065, now seen corresponding path program 11 times [2021-06-30 11:49:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:30,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737292667] [2021-06-30 11:49:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:30,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:30,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737292667] [2021-06-30 11:49:30,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737292667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:30,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236559406] [2021-06-30 11:49:30,713 INFO L93 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 [2021-06-30 11:49:30,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:30,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:30,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:30,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:49:30,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236559406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:30,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:30,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:30,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601277099] [2021-06-30 11:49:30,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:30,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:30,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:30,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:30,789 INFO L87 Difference]: Start difference. First operand 37495 states and 242629 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:31,264 INFO L93 Difference]: Finished difference Result 44406 states and 283597 transitions. [2021-06-30 11:49:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:31,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:31,843 INFO L225 Difference]: With dead ends: 44406 [2021-06-30 11:49:31,843 INFO L226 Difference]: Without dead ends: 44149 [2021-06-30 11:49:31,843 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44149 states. [2021-06-30 11:49:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44149 to 39414. [2021-06-30 11:49:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39414 states, 39413 states have (on average 6.484890772080278) internal successors, (255589), 39413 states have internal predecessors, (255589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39414 states to 39414 states and 255589 transitions. [2021-06-30 11:49:34,013 INFO L78 Accepts]: Start accepts. Automaton has 39414 states and 255589 transitions. Word has length 29 [2021-06-30 11:49:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:34,013 INFO L482 AbstractCegarLoop]: Abstraction has 39414 states and 255589 transitions. [2021-06-30 11:49:34,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 39414 states and 255589 transitions. [2021-06-30 11:49:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:34,236 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:34,236 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:34,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-30 11:49:34,461 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:34,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1734809065, now seen corresponding path program 13 times [2021-06-30 11:49:34,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:34,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374541312] [2021-06-30 11:49:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:34,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374541312] [2021-06-30 11:49:34,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374541312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870295368] [2021-06-30 11:49:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-06-30 11:49:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:34,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:49:34,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870295368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:34,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:34,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:34,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491954224] [2021-06-30 11:49:34,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:34,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:34,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:34,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:34,568 INFO L87 Difference]: Start difference. First operand 39414 states and 255589 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:35,479 INFO L93 Difference]: Finished difference Result 43728 states and 280520 transitions. [2021-06-30 11:49:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:35,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:35,742 INFO L225 Difference]: With dead ends: 43728 [2021-06-30 11:49:35,743 INFO L226 Difference]: Without dead ends: 43648 [2021-06-30 11:49:35,743 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43648 states. [2021-06-30 11:49:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43648 to 40468. [2021-06-30 11:49:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40468 states, 40467 states have (on average 6.484542960931129) internal successors, (262410), 40467 states have internal predecessors, (262410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40468 states to 40468 states and 262410 transitions. [2021-06-30 11:49:37,620 INFO L78 Accepts]: Start accepts. Automaton has 40468 states and 262410 transitions. Word has length 29 [2021-06-30 11:49:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:37,620 INFO L482 AbstractCegarLoop]: Abstraction has 40468 states and 262410 transitions. [2021-06-30 11:49:37,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 40468 states and 262410 transitions. [2021-06-30 11:49:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:37,746 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:37,747 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:37,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-30 11:49:37,947 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:37,947 INFO L82 PathProgramCache]: Analyzing trace with hash -578501093, now seen corresponding path program 14 times [2021-06-30 11:49:37,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:37,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981324477] [2021-06-30 11:49:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:37,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:37,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981324477] [2021-06-30 11:49:37,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981324477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:37,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490582957] [2021-06-30 11:49:37,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-30 11:49:38,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:49:38,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:38,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:38,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:38,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490582957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:38,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:38,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:38,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529602610] [2021-06-30 11:49:38,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:38,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:38,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:38,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:38,080 INFO L87 Difference]: Start difference. First operand 40468 states and 262410 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:38,980 INFO L93 Difference]: Finished difference Result 45437 states and 291380 transitions. [2021-06-30 11:49:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:38,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:39,200 INFO L225 Difference]: With dead ends: 45437 [2021-06-30 11:49:39,200 INFO L226 Difference]: Without dead ends: 45357 [2021-06-30 11:49:39,200 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45357 states. [2021-06-30 11:49:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45357 to 40846. [2021-06-30 11:49:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40846 states, 40845 states have (on average 6.487623944179214) internal successors, (264987), 40845 states have internal predecessors, (264987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40846 states to 40846 states and 264987 transitions. [2021-06-30 11:49:40,959 INFO L78 Accepts]: Start accepts. Automaton has 40846 states and 264987 transitions. Word has length 29 [2021-06-30 11:49:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:40,959 INFO L482 AbstractCegarLoop]: Abstraction has 40846 states and 264987 transitions. [2021-06-30 11:49:40,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 40846 states and 264987 transitions. [2021-06-30 11:49:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:41,484 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:41,485 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:41,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-30 11:49:41,685 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1735611305, now seen corresponding path program 15 times [2021-06-30 11:49:41,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:41,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163641417] [2021-06-30 11:49:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:41,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:41,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163641417] [2021-06-30 11:49:41,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163641417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:41,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543024584] [2021-06-30 11:49:41,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:49:41,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-30 11:49:41,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:41,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:41,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:41,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543024584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:41,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:41,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:41,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985322070] [2021-06-30 11:49:41,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:41,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:41,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:41,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:41,824 INFO L87 Difference]: Start difference. First operand 40846 states and 264987 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:42,356 INFO L93 Difference]: Finished difference Result 47022 states and 301656 transitions. [2021-06-30 11:49:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:42,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:42,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:42,916 INFO L225 Difference]: With dead ends: 47022 [2021-06-30 11:49:42,916 INFO L226 Difference]: Without dead ends: 46994 [2021-06-30 11:49:42,916 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:43,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46994 states. [2021-06-30 11:49:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46994 to 42929. [2021-06-30 11:49:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42929 states, 42928 states have (on average 6.502865262765561) internal successors, (279155), 42928 states have internal predecessors, (279155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42929 states to 42929 states and 279155 transitions. [2021-06-30 11:49:44,834 INFO L78 Accepts]: Start accepts. Automaton has 42929 states and 279155 transitions. Word has length 29 [2021-06-30 11:49:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:44,835 INFO L482 AbstractCegarLoop]: Abstraction has 42929 states and 279155 transitions. [2021-06-30 11:49:44,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 42929 states and 279155 transitions. [2021-06-30 11:49:44,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:44,955 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:44,955 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:45,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:45,156 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:45,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:45,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1550843291, now seen corresponding path program 16 times [2021-06-30 11:49:45,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:45,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976262157] [2021-06-30 11:49:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:45,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:45,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976262157] [2021-06-30 11:49:45,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976262157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:45,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343984590] [2021-06-30 11:49:45,204 INFO L93 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 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 [2021-06-30 11:49:45,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:49:45,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:45,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:45,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343984590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:45,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:45,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389345983] [2021-06-30 11:49:45,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:45,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:45,297 INFO L87 Difference]: Start difference. First operand 42929 states and 279155 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:46,131 INFO L93 Difference]: Finished difference Result 49382 states and 317750 transitions. [2021-06-30 11:49:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:46,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:46,359 INFO L225 Difference]: With dead ends: 49382 [2021-06-30 11:49:46,360 INFO L226 Difference]: Without dead ends: 49274 [2021-06-30 11:49:46,360 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:46,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49274 states. [2021-06-30 11:49:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49274 to 44875. [2021-06-30 11:49:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44875 states, 44874 states have (on average 6.5209252573873515) internal successors, (292620), 44874 states have internal predecessors, (292620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44875 states to 44875 states and 292620 transitions. [2021-06-30 11:49:48,547 INFO L78 Accepts]: Start accepts. Automaton has 44875 states and 292620 transitions. Word has length 29 [2021-06-30 11:49:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:48,547 INFO L482 AbstractCegarLoop]: Abstraction has 44875 states and 292620 transitions. [2021-06-30 11:49:48,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 44875 states and 292620 transitions. [2021-06-30 11:49:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:48,730 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:48,730 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:48,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:48,945 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:48,945 INFO L82 PathProgramCache]: Analyzing trace with hash 514250225, now seen corresponding path program 17 times [2021-06-30 11:49:48,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:48,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101452255] [2021-06-30 11:49:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:48,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:48,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101452255] [2021-06-30 11:49:48,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101452255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:48,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365692968] [2021-06-30 11:49:48,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-06-30 11:49:49,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-30 11:49:49,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:49,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:49,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:49,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365692968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:49,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:49,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:49,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109235755] [2021-06-30 11:49:49,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:49,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:49,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:49,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:49,049 INFO L87 Difference]: Start difference. First operand 44875 states and 292620 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:50,001 INFO L93 Difference]: Finished difference Result 51434 states and 331359 transitions. [2021-06-30 11:49:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:50,292 INFO L225 Difference]: With dead ends: 51434 [2021-06-30 11:49:50,292 INFO L226 Difference]: Without dead ends: 51292 [2021-06-30 11:49:50,292 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:50,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51292 states. [2021-06-30 11:49:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51292 to 46987. [2021-06-30 11:49:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46987 states, 46986 states have (on average 6.525688502958328) internal successors, (306616), 46986 states have internal predecessors, (306616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46987 states to 46987 states and 306616 transitions. [2021-06-30 11:49:52,255 INFO L78 Accepts]: Start accepts. Automaton has 46987 states and 306616 transitions. Word has length 29 [2021-06-30 11:49:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:52,255 INFO L482 AbstractCegarLoop]: Abstraction has 46987 states and 306616 transitions. [2021-06-30 11:49:52,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 46987 states and 306616 transitions. [2021-06-30 11:49:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:52,821 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:52,821 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:53,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:53,022 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:53,022 INFO L82 PathProgramCache]: Analyzing trace with hash -695375507, now seen corresponding path program 18 times [2021-06-30 11:49:53,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:53,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427956655] [2021-06-30 11:49:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:53,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:53,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427956655] [2021-06-30 11:49:53,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427956655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:53,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398935587] [2021-06-30 11:49:53,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-06-30 11:49:53,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-30 11:49:53,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:49:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:53,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398935587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:53,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:53,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:49:53,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644161098] [2021-06-30 11:49:53,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:49:53,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:49:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:53,160 INFO L87 Difference]: Start difference. First operand 46987 states and 306616 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:54,078 INFO L93 Difference]: Finished difference Result 53714 states and 346044 transitions. [2021-06-30 11:49:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:49:54,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:54,396 INFO L225 Difference]: With dead ends: 53714 [2021-06-30 11:49:54,396 INFO L226 Difference]: Without dead ends: 53384 [2021-06-30 11:49:54,396 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:49:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53384 states. [2021-06-30 11:49:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53384 to 47257. [2021-06-30 11:49:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47257 states, 47256 states have (on average 6.539148467919418) internal successors, (309014), 47256 states have internal predecessors, (309014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47257 states to 47257 states and 309014 transitions. [2021-06-30 11:49:56,728 INFO L78 Accepts]: Start accepts. Automaton has 47257 states and 309014 transitions. Word has length 29 [2021-06-30 11:49:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:49:56,729 INFO L482 AbstractCegarLoop]: Abstraction has 47257 states and 309014 transitions. [2021-06-30 11:49:56,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 47257 states and 309014 transitions. [2021-06-30 11:49:56,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:49:56,935 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:49:56,935 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:49:57,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:49:57,146 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:49:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:49:57,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1756492899, now seen corresponding path program 1 times [2021-06-30 11:49:57,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:49:57,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791416075] [2021-06-30 11:49:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:49:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:57,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:49:57,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791416075] [2021-06-30 11:49:57,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791416075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:57,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148278590] [2021-06-30 11:49:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-30 11:49:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:49:57,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:49:57,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:49:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:49:57,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148278590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:49:57,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:49:57,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:49:57,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850157059] [2021-06-30 11:49:57,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:49:57,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:49:57,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:49:57,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:57,274 INFO L87 Difference]: Start difference. First operand 47257 states and 309014 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:49:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:49:58,157 INFO L93 Difference]: Finished difference Result 51623 states and 333712 transitions. [2021-06-30 11:49:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:49:58,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:49:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:49:58,448 INFO L225 Difference]: With dead ends: 51623 [2021-06-30 11:49:58,448 INFO L226 Difference]: Without dead ends: 51535 [2021-06-30 11:49:58,448 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:49:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51535 states. [2021-06-30 11:50:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51535 to 47816. [2021-06-30 11:50:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47816 states, 47815 states have (on average 6.5356059813865945) internal successors, (312500), 47815 states have internal predecessors, (312500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47816 states to 47816 states and 312500 transitions. [2021-06-30 11:50:00,439 INFO L78 Accepts]: Start accepts. Automaton has 47816 states and 312500 transitions. Word has length 29 [2021-06-30 11:50:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:00,439 INFO L482 AbstractCegarLoop]: Abstraction has 47816 states and 312500 transitions. [2021-06-30 11:50:00,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 47816 states and 312500 transitions. [2021-06-30 11:50:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:01,028 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:01,028 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:01,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-30 11:50:01,229 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash -14884797, now seen corresponding path program 1 times [2021-06-30 11:50:01,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:01,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225408027] [2021-06-30 11:50:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:50:01,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:01,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225408027] [2021-06-30 11:50:01,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225408027] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:50:01,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:50:01,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:50:01,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508826665] [2021-06-30 11:50:01,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:50:01,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:01,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:50:01,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:50:01,265 INFO L87 Difference]: Start difference. First operand 47816 states and 312500 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:02,199 INFO L93 Difference]: Finished difference Result 52538 states and 339542 transitions. [2021-06-30 11:50:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:50:02,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:02,752 INFO L225 Difference]: With dead ends: 52538 [2021-06-30 11:50:02,753 INFO L226 Difference]: Without dead ends: 52491 [2021-06-30 11:50:02,753 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:50:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52491 states. [2021-06-30 11:50:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52491 to 48670. [2021-06-30 11:50:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48670 states, 48669 states have (on average 6.541248022355092) internal successors, (318356), 48669 states have internal predecessors, (318356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48670 states to 48670 states and 318356 transitions. [2021-06-30 11:50:05,165 INFO L78 Accepts]: Start accepts. Automaton has 48670 states and 318356 transitions. Word has length 29 [2021-06-30 11:50:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:05,165 INFO L482 AbstractCegarLoop]: Abstraction has 48670 states and 318356 transitions. [2021-06-30 11:50:05,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 48670 states and 318356 transitions. [2021-06-30 11:50:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:05,821 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:05,821 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:05,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-06-30 11:50:05,821 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:05,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1999490305, now seen corresponding path program 2 times [2021-06-30 11:50:05,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:05,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937668122] [2021-06-30 11:50:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:50:05,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:05,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937668122] [2021-06-30 11:50:05,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937668122] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:50:05,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:50:05,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:50:05,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76074122] [2021-06-30 11:50:05,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:50:05,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:05,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:50:05,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:50:05,852 INFO L87 Difference]: Start difference. First operand 48670 states and 318356 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:06,404 INFO L93 Difference]: Finished difference Result 52789 states and 342114 transitions. [2021-06-30 11:50:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:50:06,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:07,154 INFO L225 Difference]: With dead ends: 52789 [2021-06-30 11:50:07,154 INFO L226 Difference]: Without dead ends: 52764 [2021-06-30 11:50:07,154 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:50:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52764 states. [2021-06-30 11:50:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52764 to 49472. [2021-06-30 11:50:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49472 states, 49471 states have (on average 6.5447838127387765) internal successors, (323777), 49471 states have internal predecessors, (323777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49472 states to 49472 states and 323777 transitions. [2021-06-30 11:50:09,509 INFO L78 Accepts]: Start accepts. Automaton has 49472 states and 323777 transitions. Word has length 29 [2021-06-30 11:50:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:09,509 INFO L482 AbstractCegarLoop]: Abstraction has 49472 states and 323777 transitions. [2021-06-30 11:50:09,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 49472 states and 323777 transitions. [2021-06-30 11:50:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:10,189 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:10,189 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:10,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-06-30 11:50:10,189 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash -378314173, now seen corresponding path program 3 times [2021-06-30 11:50:10,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:10,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622939757] [2021-06-30 11:50:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:10,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:10,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622939757] [2021-06-30 11:50:10,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622939757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:10,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078255781] [2021-06-30 11:50:10,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:50:10,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:50:10,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:10,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:10,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078255781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:10,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:10,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:50:10,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296114133] [2021-06-30 11:50:10,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:50:10,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:10,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:50:10,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:50:10,307 INFO L87 Difference]: Start difference. First operand 49472 states and 323777 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:10,900 INFO L93 Difference]: Finished difference Result 54054 states and 349608 transitions. [2021-06-30 11:50:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:50:10,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:11,605 INFO L225 Difference]: With dead ends: 54054 [2021-06-30 11:50:11,605 INFO L226 Difference]: Without dead ends: 53949 [2021-06-30 11:50:11,605 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:50:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53949 states. [2021-06-30 11:50:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53949 to 48163. [2021-06-30 11:50:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48163 states, 48162 states have (on average 6.5376853120717575) internal successors, (314868), 48162 states have internal predecessors, (314868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48163 states to 48163 states and 314868 transitions. [2021-06-30 11:50:13,861 INFO L78 Accepts]: Start accepts. Automaton has 48163 states and 314868 transitions. Word has length 29 [2021-06-30 11:50:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:13,861 INFO L482 AbstractCegarLoop]: Abstraction has 48163 states and 314868 transitions. [2021-06-30 11:50:13,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 48163 states and 314868 transitions. [2021-06-30 11:50:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:14,504 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:14,504 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:14,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:14,721 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash -295926611, now seen corresponding path program 1 times [2021-06-30 11:50:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:14,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920387736] [2021-06-30 11:50:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:50:14,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:14,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920387736] [2021-06-30 11:50:14,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920387736] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:50:14,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:50:14,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:50:14,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425044333] [2021-06-30 11:50:14,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:50:14,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:14,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:50:14,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:50:14,759 INFO L87 Difference]: Start difference. First operand 48163 states and 314868 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:15,304 INFO L93 Difference]: Finished difference Result 52410 states and 338975 transitions. [2021-06-30 11:50:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:50:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:15,959 INFO L225 Difference]: With dead ends: 52410 [2021-06-30 11:50:15,959 INFO L226 Difference]: Without dead ends: 52346 [2021-06-30 11:50:15,959 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:50:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52346 states. [2021-06-30 11:50:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52346 to 48918. [2021-06-30 11:50:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48918 states, 48917 states have (on average 6.533986139787804) internal successors, (319623), 48917 states have internal predecessors, (319623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48918 states to 48918 states and 319623 transitions. [2021-06-30 11:50:18,155 INFO L78 Accepts]: Start accepts. Automaton has 48918 states and 319623 transitions. Word has length 29 [2021-06-30 11:50:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:18,155 INFO L482 AbstractCegarLoop]: Abstraction has 48918 states and 319623 transitions. [2021-06-30 11:50:18,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 48918 states and 319623 transitions. [2021-06-30 11:50:18,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:18,311 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:18,311 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:18,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-06-30 11:50:18,311 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:18,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1133148375, now seen corresponding path program 2 times [2021-06-30 11:50:18,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:18,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450931360] [2021-06-30 11:50:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:50:18,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:18,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450931360] [2021-06-30 11:50:18,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450931360] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:50:18,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:50:18,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:50:18,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356356114] [2021-06-30 11:50:18,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:50:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:50:18,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:50:18,352 INFO L87 Difference]: Start difference. First operand 48918 states and 319623 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:19,276 INFO L93 Difference]: Finished difference Result 52543 states and 340432 transitions. [2021-06-30 11:50:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:50:19,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:19,563 INFO L225 Difference]: With dead ends: 52543 [2021-06-30 11:50:19,563 INFO L226 Difference]: Without dead ends: 52506 [2021-06-30 11:50:19,563 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:50:20,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52506 states. [2021-06-30 11:50:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52506 to 49685. [2021-06-30 11:50:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49685 states, 49684 states have (on average 6.531619837372192) internal successors, (324517), 49684 states have internal predecessors, (324517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49685 states to 49685 states and 324517 transitions. [2021-06-30 11:50:22,147 INFO L78 Accepts]: Start accepts. Automaton has 49685 states and 324517 transitions. Word has length 29 [2021-06-30 11:50:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:22,148 INFO L482 AbstractCegarLoop]: Abstraction has 49685 states and 324517 transitions. [2021-06-30 11:50:22,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49685 states and 324517 transitions. [2021-06-30 11:50:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:22,315 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:22,315 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:22,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-06-30 11:50:22,315 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:22,316 INFO L82 PathProgramCache]: Analyzing trace with hash -347858789, now seen corresponding path program 3 times [2021-06-30 11:50:22,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:22,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351813733] [2021-06-30 11:50:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:22,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:22,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351813733] [2021-06-30 11:50:22,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351813733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:22,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936056616] [2021-06-30 11:50:22,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:50:22,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:50:22,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:22,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:22,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:50:22,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936056616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:22,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:22,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:50:22,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325824360] [2021-06-30 11:50:22,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:50:22,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:22,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:50:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:50:22,430 INFO L87 Difference]: Start difference. First operand 49685 states and 324517 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:23,353 INFO L93 Difference]: Finished difference Result 53783 states and 347737 transitions. [2021-06-30 11:50:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:50:23,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:23,641 INFO L225 Difference]: With dead ends: 53783 [2021-06-30 11:50:23,641 INFO L226 Difference]: Without dead ends: 53570 [2021-06-30 11:50:23,642 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:50:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53570 states. [2021-06-30 11:50:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53570 to 48363. [2021-06-30 11:50:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48363 states, 48362 states have (on average 6.533249245275216) internal successors, (315961), 48362 states have internal predecessors, (315961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48363 states to 48363 states and 315961 transitions. [2021-06-30 11:50:26,080 INFO L78 Accepts]: Start accepts. Automaton has 48363 states and 315961 transitions. Word has length 29 [2021-06-30 11:50:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:26,080 INFO L482 AbstractCegarLoop]: Abstraction has 48363 states and 315961 transitions. [2021-06-30 11:50:26,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 48363 states and 315961 transitions. [2021-06-30 11:50:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:26,222 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:26,222 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:26,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:26,422 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash 76162845, now seen corresponding path program 2 times [2021-06-30 11:50:26,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:26,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712100948] [2021-06-30 11:50:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:26,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:26,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712100948] [2021-06-30 11:50:26,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712100948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:26,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448276284] [2021-06-30 11:50:26,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-30 11:50:26,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:50:26,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:26,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:26,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:26,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448276284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:26,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:26,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:26,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085955008] [2021-06-30 11:50:26,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:26,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:26,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:26,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:26,543 INFO L87 Difference]: Start difference. First operand 48363 states and 315961 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:27,537 INFO L93 Difference]: Finished difference Result 53020 states and 342260 transitions. [2021-06-30 11:50:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:27,826 INFO L225 Difference]: With dead ends: 53020 [2021-06-30 11:50:27,826 INFO L226 Difference]: Without dead ends: 52912 [2021-06-30 11:50:27,826 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52912 states. [2021-06-30 11:50:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52912 to 48530. [2021-06-30 11:50:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48530 states, 48529 states have (on average 6.530899050052546) internal successors, (316938), 48529 states have internal predecessors, (316938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48530 states to 48530 states and 316938 transitions. [2021-06-30 11:50:30,826 INFO L78 Accepts]: Start accepts. Automaton has 48530 states and 316938 transitions. Word has length 29 [2021-06-30 11:50:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:30,826 INFO L482 AbstractCegarLoop]: Abstraction has 48530 states and 316938 transitions. [2021-06-30 11:50:30,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 48530 states and 316938 transitions. [2021-06-30 11:50:31,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:31,075 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:31,075 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:31,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:31,276 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:31,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1664346527, now seen corresponding path program 3 times [2021-06-30 11:50:31,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:31,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269016255] [2021-06-30 11:50:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:31,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:31,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269016255] [2021-06-30 11:50:31,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269016255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:31,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631674734] [2021-06-30 11:50:31,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-30 11:50:31,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-30 11:50:31,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:31,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631674734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:31,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:31,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:31,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195676682] [2021-06-30 11:50:31,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:31,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:31,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:31,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:31,426 INFO L87 Difference]: Start difference. First operand 48530 states and 316938 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:32,442 INFO L93 Difference]: Finished difference Result 52657 states and 340615 transitions. [2021-06-30 11:50:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:32,442 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:32,736 INFO L225 Difference]: With dead ends: 52657 [2021-06-30 11:50:32,736 INFO L226 Difference]: Without dead ends: 52623 [2021-06-30 11:50:32,736 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:32,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52623 states. [2021-06-30 11:50:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52623 to 49216. [2021-06-30 11:50:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49216 states, 49215 states have (on average 6.533292695316469) internal successors, (321536), 49215 states have internal predecessors, (321536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49216 states to 49216 states and 321536 transitions. [2021-06-30 11:50:35,298 INFO L78 Accepts]: Start accepts. Automaton has 49216 states and 321536 transitions. Word has length 29 [2021-06-30 11:50:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:35,299 INFO L482 AbstractCegarLoop]: Abstraction has 49216 states and 321536 transitions. [2021-06-30 11:50:35,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 49216 states and 321536 transitions. [2021-06-30 11:50:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:35,516 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:35,516 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:35,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:35,717 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1834260065, now seen corresponding path program 4 times [2021-06-30 11:50:35,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:35,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908657268] [2021-06-30 11:50:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:35,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:35,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908657268] [2021-06-30 11:50:35,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908657268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:35,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882643394] [2021-06-30 11:50:35,768 INFO L93 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 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 [2021-06-30 11:50:35,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:50:35,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:35,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:35,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882643394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:35,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:35,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:35,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315994405] [2021-06-30 11:50:35,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:35,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:35,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:35,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:35,860 INFO L87 Difference]: Start difference. First operand 49216 states and 321536 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:37,096 INFO L93 Difference]: Finished difference Result 53842 states and 348455 transitions. [2021-06-30 11:50:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:37,441 INFO L225 Difference]: With dead ends: 53842 [2021-06-30 11:50:37,441 INFO L226 Difference]: Without dead ends: 53786 [2021-06-30 11:50:37,442 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53786 states. [2021-06-30 11:50:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53786 to 50208. [2021-06-30 11:50:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50208 states, 50207 states have (on average 6.53639930686956) internal successors, (328173), 50207 states have internal predecessors, (328173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:39,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50208 states to 50208 states and 328173 transitions. [2021-06-30 11:50:39,995 INFO L78 Accepts]: Start accepts. Automaton has 50208 states and 328173 transitions. Word has length 29 [2021-06-30 11:50:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:39,996 INFO L482 AbstractCegarLoop]: Abstraction has 50208 states and 328173 transitions. [2021-06-30 11:50:39,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 50208 states and 328173 transitions. [2021-06-30 11:50:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:40,199 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:40,200 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:40,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:40,400 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1325010589, now seen corresponding path program 5 times [2021-06-30 11:50:40,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:40,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428678632] [2021-06-30 11:50:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:40,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:40,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428678632] [2021-06-30 11:50:40,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428678632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:40,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704942829] [2021-06-30 11:50:40,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-06-30 11:50:40,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:50:40,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:40,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:40,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:40,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704942829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:40,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:40,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:40,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308257353] [2021-06-30 11:50:40,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:40,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:40,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:40,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:40,527 INFO L87 Difference]: Start difference. First operand 50208 states and 328173 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:41,549 INFO L93 Difference]: Finished difference Result 55116 states and 356810 transitions. [2021-06-30 11:50:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:41,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:41,901 INFO L225 Difference]: With dead ends: 55116 [2021-06-30 11:50:41,901 INFO L226 Difference]: Without dead ends: 55028 [2021-06-30 11:50:41,902 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55028 states. [2021-06-30 11:50:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55028 to 51171. [2021-06-30 11:50:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51171 states, 51170 states have (on average 6.544381473519641) internal successors, (334876), 51170 states have internal predecessors, (334876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51171 states to 51171 states and 334876 transitions. [2021-06-30 11:50:44,548 INFO L78 Accepts]: Start accepts. Automaton has 51171 states and 334876 transitions. Word has length 29 [2021-06-30 11:50:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:44,549 INFO L482 AbstractCegarLoop]: Abstraction has 51171 states and 334876 transitions. [2021-06-30 11:50:44,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 51171 states and 334876 transitions. [2021-06-30 11:50:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:44,734 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:44,734 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:44,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:44,934 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:44,935 INFO L82 PathProgramCache]: Analyzing trace with hash 559123587, now seen corresponding path program 6 times [2021-06-30 11:50:44,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:44,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705384864] [2021-06-30 11:50:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:44,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:44,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705384864] [2021-06-30 11:50:44,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705384864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:44,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682531921] [2021-06-30 11:50:44,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:45,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:50:45,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:45,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:45,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682531921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:45,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:45,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:50:45,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393700378] [2021-06-30 11:50:45,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:50:45,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:45,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:50:45,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:50:45,057 INFO L87 Difference]: Start difference. First operand 51171 states and 334876 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:46,016 INFO L93 Difference]: Finished difference Result 55421 states and 359362 transitions. [2021-06-30 11:50:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:50:46,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:46,324 INFO L225 Difference]: With dead ends: 55421 [2021-06-30 11:50:46,324 INFO L226 Difference]: Without dead ends: 55336 [2021-06-30 11:50:46,324 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:50:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55336 states. [2021-06-30 11:50:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55336 to 51996. [2021-06-30 11:50:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51996 states, 51995 states have (on average 6.546071737667083) internal successors, (340363), 51995 states have internal predecessors, (340363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51996 states to 51996 states and 340363 transitions. [2021-06-30 11:50:48,928 INFO L78 Accepts]: Start accepts. Automaton has 51996 states and 340363 transitions. Word has length 29 [2021-06-30 11:50:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:48,928 INFO L482 AbstractCegarLoop]: Abstraction has 51996 states and 340363 transitions. [2021-06-30 11:50:48,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 51996 states and 340363 transitions. [2021-06-30 11:50:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:49,094 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:49,094 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:49,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-30 11:50:49,297 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash -237237117, now seen corresponding path program 7 times [2021-06-30 11:50:49,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:49,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936100602] [2021-06-30 11:50:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:49,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936100602] [2021-06-30 11:50:49,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936100602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489146844] [2021-06-30 11:50:49,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:49,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:49,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489146844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:49,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:49,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:49,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313661337] [2021-06-30 11:50:49,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:49,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:49,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:49,423 INFO L87 Difference]: Start difference. First operand 51996 states and 340363 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:50,406 INFO L93 Difference]: Finished difference Result 57162 states and 370347 transitions. [2021-06-30 11:50:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:50,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:50,719 INFO L225 Difference]: With dead ends: 57162 [2021-06-30 11:50:50,719 INFO L226 Difference]: Without dead ends: 57034 [2021-06-30 11:50:50,719 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57034 states. [2021-06-30 11:50:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57034 to 52584. [2021-06-30 11:50:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52584 states, 52583 states have (on average 6.549417111994371) internal successors, (344388), 52583 states have internal predecessors, (344388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52584 states to 52584 states and 344388 transitions. [2021-06-30 11:50:53,305 INFO L78 Accepts]: Start accepts. Automaton has 52584 states and 344388 transitions. Word has length 29 [2021-06-30 11:50:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:53,306 INFO L482 AbstractCegarLoop]: Abstraction has 52584 states and 344388 transitions. [2021-06-30 11:50:53,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 52584 states and 344388 transitions. [2021-06-30 11:50:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:53,480 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:53,480 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:53,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:53,680 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:53,681 INFO L82 PathProgramCache]: Analyzing trace with hash -625444985, now seen corresponding path program 8 times [2021-06-30 11:50:53,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:53,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283568997] [2021-06-30 11:50:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:54,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:54,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283568997] [2021-06-30 11:50:54,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283568997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:54,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90392539] [2021-06-30 11:50:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:54,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:50:54,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:54,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:54,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90392539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:54,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:54,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:54,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656020898] [2021-06-30 11:50:54,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:54,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:54,228 INFO L87 Difference]: Start difference. First operand 52584 states and 344388 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:50:55,189 INFO L93 Difference]: Finished difference Result 57275 states and 371898 transitions. [2021-06-30 11:50:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:50:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:50:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:50:55,752 INFO L225 Difference]: With dead ends: 57275 [2021-06-30 11:50:55,753 INFO L226 Difference]: Without dead ends: 57190 [2021-06-30 11:50:55,753 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57190 states. [2021-06-30 11:50:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57190 to 53532. [2021-06-30 11:50:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53532 states, 53531 states have (on average 6.5573966486708635) internal successors, (351024), 53531 states have internal predecessors, (351024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53532 states to 53532 states and 351024 transitions. [2021-06-30 11:50:58,718 INFO L78 Accepts]: Start accepts. Automaton has 53532 states and 351024 transitions. Word has length 29 [2021-06-30 11:50:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:50:58,718 INFO L482 AbstractCegarLoop]: Abstraction has 53532 states and 351024 transitions. [2021-06-30 11:50:58,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:50:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 53532 states and 351024 transitions. [2021-06-30 11:50:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:50:58,908 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:50:58,908 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:50:59,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-30 11:50:59,109 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:50:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:50:59,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1421805689, now seen corresponding path program 9 times [2021-06-30 11:50:59,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:50:59,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321230113] [2021-06-30 11:50:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:50:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:50:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:59,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:50:59,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321230113] [2021-06-30 11:50:59,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321230113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:59,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918208760] [2021-06-30 11:50:59,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:50:59,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-30 11:50:59,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:50:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:50:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:50:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:50:59,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918208760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:50:59,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:50:59,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:50:59,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777024135] [2021-06-30 11:50:59,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:50:59,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:50:59,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:50:59,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:50:59,227 INFO L87 Difference]: Start difference. First operand 53532 states and 351024 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:00,278 INFO L93 Difference]: Finished difference Result 58775 states and 382026 transitions. [2021-06-30 11:51:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:00,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:00,643 INFO L225 Difference]: With dead ends: 58775 [2021-06-30 11:51:00,643 INFO L226 Difference]: Without dead ends: 58751 [2021-06-30 11:51:00,643 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58751 states. [2021-06-30 11:51:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58751 to 54836. [2021-06-30 11:51:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54836 states, 54835 states have (on average 6.5671195404395) internal successors, (360108), 54835 states have internal predecessors, (360108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54836 states to 54836 states and 360108 transitions. [2021-06-30 11:51:03,152 INFO L78 Accepts]: Start accepts. Automaton has 54836 states and 360108 transitions. Word has length 29 [2021-06-30 11:51:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:03,152 INFO L482 AbstractCegarLoop]: Abstraction has 54836 states and 360108 transitions. [2021-06-30 11:51:03,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 54836 states and 360108 transitions. [2021-06-30 11:51:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:03,319 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:03,319 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:03,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:03,520 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:03,520 INFO L82 PathProgramCache]: Analyzing trace with hash -145478717, now seen corresponding path program 10 times [2021-06-30 11:51:03,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:03,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396639645] [2021-06-30 11:51:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:03,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:03,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396639645] [2021-06-30 11:51:03,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396639645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:03,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453279874] [2021-06-30 11:51:03,580 INFO L93 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:03,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:51:03,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:03,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:03,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:03,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453279874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:03,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:03,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:03,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911256620] [2021-06-30 11:51:03,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:03,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:03,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:03,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:03,652 INFO L87 Difference]: Start difference. First operand 54836 states and 360108 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:04,642 INFO L93 Difference]: Finished difference Result 60548 states and 393852 transitions. [2021-06-30 11:51:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:05,249 INFO L225 Difference]: With dead ends: 60548 [2021-06-30 11:51:05,249 INFO L226 Difference]: Without dead ends: 60464 [2021-06-30 11:51:05,249 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60464 states. [2021-06-30 11:51:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60464 to 56264. [2021-06-30 11:51:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56264 states, 56263 states have (on average 6.574053996409718) internal successors, (369876), 56263 states have internal predecessors, (369876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56264 states to 56264 states and 369876 transitions. [2021-06-30 11:51:08,051 INFO L78 Accepts]: Start accepts. Automaton has 56264 states and 369876 transitions. Word has length 29 [2021-06-30 11:51:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:08,051 INFO L482 AbstractCegarLoop]: Abstraction has 56264 states and 369876 transitions. [2021-06-30 11:51:08,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 56264 states and 369876 transitions. [2021-06-30 11:51:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:08,243 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:08,243 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:08,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-30 11:51:08,444 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash 208118919, now seen corresponding path program 4 times [2021-06-30 11:51:08,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:08,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077537665] [2021-06-30 11:51:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:08,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:08,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077537665] [2021-06-30 11:51:08,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077537665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:08,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312641725] [2021-06-30 11:51:08,479 INFO L93 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:08,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:51:08,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:08,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:08,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312641725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:08,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:08,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:51:08,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735182532] [2021-06-30 11:51:08,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:51:08,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:08,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:51:08,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:08,548 INFO L87 Difference]: Start difference. First operand 56264 states and 369876 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:09,528 INFO L93 Difference]: Finished difference Result 61292 states and 398657 transitions. [2021-06-30 11:51:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:51:09,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:09,875 INFO L225 Difference]: With dead ends: 61292 [2021-06-30 11:51:09,875 INFO L226 Difference]: Without dead ends: 61216 [2021-06-30 11:51:09,876 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61216 states. [2021-06-30 11:51:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61216 to 57046. [2021-06-30 11:51:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57046 states, 57045 states have (on average 6.580366377421334) internal successors, (375377), 57045 states have internal predecessors, (375377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57046 states to 57046 states and 375377 transitions. [2021-06-30 11:51:12,576 INFO L78 Accepts]: Start accepts. Automaton has 57046 states and 375377 transitions. Word has length 29 [2021-06-30 11:51:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:12,576 INFO L482 AbstractCegarLoop]: Abstraction has 57046 states and 375377 transitions. [2021-06-30 11:51:12,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 57046 states and 375377 transitions. [2021-06-30 11:51:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:13,155 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:13,155 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:13,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:13,361 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:13,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:13,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1776486589, now seen corresponding path program 5 times [2021-06-30 11:51:13,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:13,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497299049] [2021-06-30 11:51:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:13,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497299049] [2021-06-30 11:51:13,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497299049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826467147] [2021-06-30 11:51:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:13,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:51:13,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:13,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:13,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:13,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826467147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:13,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:13,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:51:13,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684429998] [2021-06-30 11:51:13,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:51:13,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:13,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:51:13,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:13,471 INFO L87 Difference]: Start difference. First operand 57046 states and 375377 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:14,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:14,397 INFO L93 Difference]: Finished difference Result 61712 states and 402266 transitions. [2021-06-30 11:51:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:51:14,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:14,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:14,747 INFO L225 Difference]: With dead ends: 61712 [2021-06-30 11:51:14,747 INFO L226 Difference]: Without dead ends: 61656 [2021-06-30 11:51:14,747 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61656 states. [2021-06-30 11:51:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61656 to 58179. [2021-06-30 11:51:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58179 states, 58178 states have (on average 6.5805287221973945) internal successors, (382842), 58178 states have internal predecessors, (382842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58179 states to 58179 states and 382842 transitions. [2021-06-30 11:51:17,387 INFO L78 Accepts]: Start accepts. Automaton has 58179 states and 382842 transitions. Word has length 29 [2021-06-30 11:51:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:17,387 INFO L482 AbstractCegarLoop]: Abstraction has 58179 states and 382842 transitions. [2021-06-30 11:51:17,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 58179 states and 382842 transitions. [2021-06-30 11:51:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:17,565 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:17,565 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:17,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-30 11:51:17,766 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash -155310457, now seen corresponding path program 6 times [2021-06-30 11:51:17,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:17,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906408641] [2021-06-30 11:51:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:17,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:17,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906408641] [2021-06-30 11:51:17,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906408641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:17,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481181627] [2021-06-30 11:51:17,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:17,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:51:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:17,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481181627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:17,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:17,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:17,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12576635] [2021-06-30 11:51:17,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:17,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:17,886 INFO L87 Difference]: Start difference. First operand 58179 states and 382842 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:18,897 INFO L93 Difference]: Finished difference Result 62867 states and 409140 transitions. [2021-06-30 11:51:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:19,721 INFO L225 Difference]: With dead ends: 62867 [2021-06-30 11:51:19,721 INFO L226 Difference]: Without dead ends: 62731 [2021-06-30 11:51:19,722 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62731 states. [2021-06-30 11:51:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62731 to 56181. [2021-06-30 11:51:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56181 states, 56180 states have (on average 6.576379494482022) internal successors, (369461), 56180 states have internal predecessors, (369461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56181 states to 56181 states and 369461 transitions. [2021-06-30 11:51:22,708 INFO L78 Accepts]: Start accepts. Automaton has 56181 states and 369461 transitions. Word has length 29 [2021-06-30 11:51:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:22,708 INFO L482 AbstractCegarLoop]: Abstraction has 56181 states and 369461 transitions. [2021-06-30 11:51:22,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 56181 states and 369461 transitions. [2021-06-30 11:51:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:23,426 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:23,426 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:23,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-30 11:51:23,627 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1491468857, now seen corresponding path program 7 times [2021-06-30 11:51:23,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:23,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216263596] [2021-06-30 11:51:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:51:23,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:23,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216263596] [2021-06-30 11:51:23,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216263596] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:51:23,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:51:23,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:51:23,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449771743] [2021-06-30 11:51:23,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:51:23,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:23,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:51:23,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:23,657 INFO L87 Difference]: Start difference. First operand 56181 states and 369461 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:24,631 INFO L93 Difference]: Finished difference Result 59779 states and 389831 transitions. [2021-06-30 11:51:24,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:51:24,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:24,968 INFO L225 Difference]: With dead ends: 59779 [2021-06-30 11:51:24,968 INFO L226 Difference]: Without dead ends: 59763 [2021-06-30 11:51:24,968 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59763 states. [2021-06-30 11:51:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59763 to 56887. [2021-06-30 11:51:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56887 states, 56886 states have (on average 6.577664100130085) internal successors, (374177), 56886 states have internal predecessors, (374177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56887 states to 56887 states and 374177 transitions. [2021-06-30 11:51:27,584 INFO L78 Accepts]: Start accepts. Automaton has 56887 states and 374177 transitions. Word has length 29 [2021-06-30 11:51:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:27,584 INFO L482 AbstractCegarLoop]: Abstraction has 56887 states and 374177 transitions. [2021-06-30 11:51:27,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 56887 states and 374177 transitions. [2021-06-30 11:51:27,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:27,793 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:27,793 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:27,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-06-30 11:51:27,794 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash 303973123, now seen corresponding path program 8 times [2021-06-30 11:51:27,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:27,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288579507] [2021-06-30 11:51:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:51:27,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288579507] [2021-06-30 11:51:27,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288579507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619089561] [2021-06-30 11:51:27,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:27,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:51:27,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:27,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:27,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:51:27,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619089561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:27,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:27,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:51:27,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710435978] [2021-06-30 11:51:27,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:51:27,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:27,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:51:27,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:27,906 INFO L87 Difference]: Start difference. First operand 56887 states and 374177 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:28,907 INFO L93 Difference]: Finished difference Result 61841 states and 402327 transitions. [2021-06-30 11:51:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:51:28,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:29,496 INFO L225 Difference]: With dead ends: 61841 [2021-06-30 11:51:29,496 INFO L226 Difference]: Without dead ends: 61715 [2021-06-30 11:51:29,497 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61715 states. [2021-06-30 11:51:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61715 to 56957. [2021-06-30 11:51:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56957 states, 56956 states have (on average 6.582045789732425) internal successors, (374887), 56956 states have internal predecessors, (374887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56957 states to 56957 states and 374887 transitions. [2021-06-30 11:51:32,158 INFO L78 Accepts]: Start accepts. Automaton has 56957 states and 374887 transitions. Word has length 29 [2021-06-30 11:51:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:32,158 INFO L482 AbstractCegarLoop]: Abstraction has 56957 states and 374887 transitions. [2021-06-30 11:51:32,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 56957 states and 374887 transitions. [2021-06-30 11:51:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:32,403 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:32,403 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:32,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-30 11:51:32,604 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1682608321, now seen corresponding path program 9 times [2021-06-30 11:51:32,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:32,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232762977] [2021-06-30 11:51:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:32,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:32,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232762977] [2021-06-30 11:51:32,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232762977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:32,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36224634] [2021-06-30 11:51:32,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:32,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:51:32,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:32,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:32,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36224634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:32,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:32,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:51:32,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593231411] [2021-06-30 11:51:32,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:51:32,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:32,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:51:32,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:32,715 INFO L87 Difference]: Start difference. First operand 56957 states and 374887 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:33,679 INFO L93 Difference]: Finished difference Result 60872 states and 397146 transitions. [2021-06-30 11:51:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:51:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:34,040 INFO L225 Difference]: With dead ends: 60872 [2021-06-30 11:51:34,040 INFO L226 Difference]: Without dead ends: 60832 [2021-06-30 11:51:34,041 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60832 states. [2021-06-30 11:51:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60832 to 57583. [2021-06-30 11:51:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57583 states, 57582 states have (on average 6.583272550449793) internal successors, (379078), 57582 states have internal predecessors, (379078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57583 states to 57583 states and 379078 transitions. [2021-06-30 11:51:36,774 INFO L78 Accepts]: Start accepts. Automaton has 57583 states and 379078 transitions. Word has length 29 [2021-06-30 11:51:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:36,774 INFO L482 AbstractCegarLoop]: Abstraction has 57583 states and 379078 transitions. [2021-06-30 11:51:36,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:36,774 INFO L276 IsEmpty]: Start isEmpty. Operand 57583 states and 379078 transitions. [2021-06-30 11:51:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:36,944 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:36,944 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:37,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:37,144 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1101680771, now seen corresponding path program 10 times [2021-06-30 11:51:37,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:37,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834574646] [2021-06-30 11:51:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:37,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:37,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834574646] [2021-06-30 11:51:37,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834574646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:37,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087665538] [2021-06-30 11:51:37,201 INFO L93 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:37,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:51:37,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:37,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:37,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:37,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087665538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:37,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:37,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:37,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339482432] [2021-06-30 11:51:37,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:37,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:37,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:37,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:37,287 INFO L87 Difference]: Start difference. First operand 57583 states and 379078 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:38,295 INFO L93 Difference]: Finished difference Result 62111 states and 405015 transitions. [2021-06-30 11:51:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:38,917 INFO L225 Difference]: With dead ends: 62111 [2021-06-30 11:51:38,918 INFO L226 Difference]: Without dead ends: 62071 [2021-06-30 11:51:38,918 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62071 states. [2021-06-30 11:51:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62071 to 57876. [2021-06-30 11:51:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57876 states, 57875 states have (on average 6.584483801295896) internal successors, (381077), 57875 states have internal predecessors, (381077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57876 states to 57876 states and 381077 transitions. [2021-06-30 11:51:41,811 INFO L78 Accepts]: Start accepts. Automaton has 57876 states and 381077 transitions. Word has length 29 [2021-06-30 11:51:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:41,811 INFO L482 AbstractCegarLoop]: Abstraction has 57876 states and 381077 transitions. [2021-06-30 11:51:41,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:41,811 INFO L276 IsEmpty]: Start isEmpty. Operand 57876 states and 381077 transitions. [2021-06-30 11:51:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:42,008 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:42,008 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:42,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-30 11:51:42,209 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1544740483, now seen corresponding path program 11 times [2021-06-30 11:51:42,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:42,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107156179] [2021-06-30 11:51:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:42,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:42,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107156179] [2021-06-30 11:51:42,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107156179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:42,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811095712] [2021-06-30 11:51:42,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:42,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:51:42,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:42,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:42,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:51:42,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811095712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:42,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:42,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:42,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590183653] [2021-06-30 11:51:42,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:42,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:42,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:42,351 INFO L87 Difference]: Start difference. First operand 57876 states and 381077 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:43,715 INFO L93 Difference]: Finished difference Result 62953 states and 410643 transitions. [2021-06-30 11:51:43,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:43,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:43,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:44,283 INFO L225 Difference]: With dead ends: 62953 [2021-06-30 11:51:44,284 INFO L226 Difference]: Without dead ends: 62917 [2021-06-30 11:51:44,284 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62917 states. [2021-06-30 11:51:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62917 to 58996. [2021-06-30 11:51:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58996 states, 58995 states have (on average 6.588439698279515) internal successors, (388685), 58995 states have internal predecessors, (388685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58996 states to 58996 states and 388685 transitions. [2021-06-30 11:51:47,170 INFO L78 Accepts]: Start accepts. Automaton has 58996 states and 388685 transitions. Word has length 29 [2021-06-30 11:51:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:47,171 INFO L482 AbstractCegarLoop]: Abstraction has 58996 states and 388685 transitions. [2021-06-30 11:51:47,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 58996 states and 388685 transitions. [2021-06-30 11:51:47,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:47,336 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:47,336 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:47,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-30 11:51:47,537 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:47,537 INFO L82 PathProgramCache]: Analyzing trace with hash 480980679, now seen corresponding path program 12 times [2021-06-30 11:51:47,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:47,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550062620] [2021-06-30 11:51:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:47,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550062620] [2021-06-30 11:51:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550062620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468338802] [2021-06-30 11:51:47,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:47,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:51:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:47,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:47,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:47,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468338802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:47,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:47,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:51:47,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670932620] [2021-06-30 11:51:47,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:51:47,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:51:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:47,661 INFO L87 Difference]: Start difference. First operand 58996 states and 388685 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:48,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:48,634 INFO L93 Difference]: Finished difference Result 63311 states and 413734 transitions. [2021-06-30 11:51:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:51:48,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:48,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:49,222 INFO L225 Difference]: With dead ends: 63311 [2021-06-30 11:51:49,222 INFO L226 Difference]: Without dead ends: 63295 [2021-06-30 11:51:49,222 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:51:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63295 states. [2021-06-30 11:51:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63295 to 59914. [2021-06-30 11:51:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59914 states, 59913 states have (on average 6.594895932435365) internal successors, (395120), 59913 states have internal predecessors, (395120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59914 states to 59914 states and 395120 transitions. [2021-06-30 11:51:52,224 INFO L78 Accepts]: Start accepts. Automaton has 59914 states and 395120 transitions. Word has length 29 [2021-06-30 11:51:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:52,224 INFO L482 AbstractCegarLoop]: Abstraction has 59914 states and 395120 transitions. [2021-06-30 11:51:52,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 59914 states and 395120 transitions. [2021-06-30 11:51:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:52,427 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:52,427 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:52,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-30 11:51:52,627 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash -676129533, now seen corresponding path program 13 times [2021-06-30 11:51:52,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:52,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117178970] [2021-06-30 11:51:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:52,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:52,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117178970] [2021-06-30 11:51:52,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117178970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:52,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361169618] [2021-06-30 11:51:52,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:52,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:52,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:51:52,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361169618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:52,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:52,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:51:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041699852] [2021-06-30 11:51:52,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:51:52,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:51:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:52,748 INFO L87 Difference]: Start difference. First operand 59914 states and 395120 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:53,821 INFO L93 Difference]: Finished difference Result 65076 states and 424547 transitions. [2021-06-30 11:51:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:51:53,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:54,482 INFO L225 Difference]: With dead ends: 65076 [2021-06-30 11:51:54,482 INFO L226 Difference]: Without dead ends: 64950 [2021-06-30 11:51:54,482 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:51:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64950 states. [2021-06-30 11:51:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64950 to 59556. [2021-06-30 11:51:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59556 states, 59555 states have (on average 6.592410376962472) internal successors, (392611), 59555 states have internal predecessors, (392611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59556 states to 59556 states and 392611 transitions. [2021-06-30 11:51:57,318 INFO L78 Accepts]: Start accepts. Automaton has 59556 states and 392611 transitions. Word has length 29 [2021-06-30 11:51:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:51:57,319 INFO L482 AbstractCegarLoop]: Abstraction has 59556 states and 392611 transitions. [2021-06-30 11:51:57,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 59556 states and 392611 transitions. [2021-06-30 11:51:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:51:57,547 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:51:57,547 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:51:57,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:57,748 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:51:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:51:57,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1152009179, now seen corresponding path program 14 times [2021-06-30 11:51:57,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:51:57,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345966668] [2021-06-30 11:51:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:51:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:51:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:51:57,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:51:57,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345966668] [2021-06-30 11:51:57,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345966668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:57,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958615085] [2021-06-30 11:51:57,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:51:57,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:51:57,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:51:57,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:51:57,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:51:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:51:57,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958615085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:51:57,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:51:57,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:51:57,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866217018] [2021-06-30 11:51:57,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:51:57,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:51:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:51:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:57,859 INFO L87 Difference]: Start difference. First operand 59556 states and 392611 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:51:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:51:58,861 INFO L93 Difference]: Finished difference Result 63714 states and 416272 transitions. [2021-06-30 11:51:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:51:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:51:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:51:59,226 INFO L225 Difference]: With dead ends: 63714 [2021-06-30 11:51:59,226 INFO L226 Difference]: Without dead ends: 63690 [2021-06-30 11:51:59,226 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:51:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63690 states. [2021-06-30 11:52:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63690 to 60433. [2021-06-30 11:52:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60433 states, 60432 states have (on average 6.5940064866296) internal successors, (398489), 60432 states have internal predecessors, (398489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60433 states to 60433 states and 398489 transitions. [2021-06-30 11:52:02,445 INFO L78 Accepts]: Start accepts. Automaton has 60433 states and 398489 transitions. Word has length 29 [2021-06-30 11:52:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:02,446 INFO L482 AbstractCegarLoop]: Abstraction has 60433 states and 398489 transitions. [2021-06-30 11:52:02,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:02,446 INFO L276 IsEmpty]: Start isEmpty. Operand 60433 states and 398489 transitions. [2021-06-30 11:52:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:02,707 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:02,707 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:02,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:02,909 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:02,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:02,909 INFO L82 PathProgramCache]: Analyzing trace with hash -57616553, now seen corresponding path program 15 times [2021-06-30 11:52:02,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:02,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970293697] [2021-06-30 11:52:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:02,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:02,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970293697] [2021-06-30 11:52:02,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970293697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:02,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641453621] [2021-06-30 11:52:02,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:02,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:52:02,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:03,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641453621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:03,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:03,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:03,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107265928] [2021-06-30 11:52:03,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:03,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:03,016 INFO L87 Difference]: Start difference. First operand 60433 states and 398489 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:04,076 INFO L93 Difference]: Finished difference Result 65313 states and 426075 transitions. [2021-06-30 11:52:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:04,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:04,478 INFO L225 Difference]: With dead ends: 65313 [2021-06-30 11:52:04,478 INFO L226 Difference]: Without dead ends: 65229 [2021-06-30 11:52:04,478 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65229 states. [2021-06-30 11:52:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65229 to 60405. [2021-06-30 11:52:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60405 states, 60404 states have (on average 6.5966657837229326) internal successors, (398465), 60404 states have internal predecessors, (398465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60405 states to 60405 states and 398465 transitions. [2021-06-30 11:52:07,319 INFO L78 Accepts]: Start accepts. Automaton has 60405 states and 398465 transitions. Word has length 29 [2021-06-30 11:52:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:07,319 INFO L482 AbstractCegarLoop]: Abstraction has 60405 states and 398465 transitions. [2021-06-30 11:52:07,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 60405 states and 398465 transitions. [2021-06-30 11:52:08,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:08,150 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:08,155 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:08,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:08,380 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:08,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1565625111, now seen corresponding path program 16 times [2021-06-30 11:52:08,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:08,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258644257] [2021-06-30 11:52:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:08,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:08,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258644257] [2021-06-30 11:52:08,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258644257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:08,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449014247] [2021-06-30 11:52:08,432 INFO L93 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:08,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:52:08,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:08,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:08,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:08,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449014247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:08,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:08,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:08,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586703428] [2021-06-30 11:52:08,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:08,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:08,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:08,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:08,515 INFO L87 Difference]: Start difference. First operand 60405 states and 398465 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:09,619 INFO L93 Difference]: Finished difference Result 66923 states and 436646 transitions. [2021-06-30 11:52:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:10,327 INFO L225 Difference]: With dead ends: 66923 [2021-06-30 11:52:10,328 INFO L226 Difference]: Without dead ends: 66789 [2021-06-30 11:52:10,328 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66789 states. [2021-06-30 11:52:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66789 to 62260. [2021-06-30 11:52:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62260 states, 62259 states have (on average 6.600764548097464) internal successors, (410957), 62259 states have internal predecessors, (410957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62260 states to 62260 states and 410957 transitions. [2021-06-30 11:52:13,447 INFO L78 Accepts]: Start accepts. Automaton has 62260 states and 410957 transitions. Word has length 29 [2021-06-30 11:52:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:13,447 INFO L482 AbstractCegarLoop]: Abstraction has 62260 states and 410957 transitions. [2021-06-30 11:52:13,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 62260 states and 410957 transitions. [2021-06-30 11:52:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:13,638 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:13,638 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:13,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-30 11:52:13,838 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:13,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1889896105, now seen corresponding path program 17 times [2021-06-30 11:52:13,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:13,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978591691] [2021-06-30 11:52:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:13,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:13,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978591691] [2021-06-30 11:52:13,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978591691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:13,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440580727] [2021-06-30 11:52:13,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:14,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:52:14,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:14,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:14,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:14,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440580727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:14,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:14,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:14,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381199085] [2021-06-30 11:52:14,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:14,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:14,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:14,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:14,348 INFO L87 Difference]: Start difference. First operand 62260 states and 410957 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:15,286 INFO L93 Difference]: Finished difference Result 68356 states and 446653 transitions. [2021-06-30 11:52:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:15,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:15,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:15,681 INFO L225 Difference]: With dead ends: 68356 [2021-06-30 11:52:15,682 INFO L226 Difference]: Without dead ends: 68234 [2021-06-30 11:52:15,682 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68234 states. [2021-06-30 11:52:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68234 to 62763. [2021-06-30 11:52:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62763 states, 62762 states have (on average 6.605748701443549) internal successors, (414590), 62762 states have internal predecessors, (414590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62763 states to 62763 states and 414590 transitions. [2021-06-30 11:52:18,521 INFO L78 Accepts]: Start accepts. Automaton has 62763 states and 414590 transitions. Word has length 29 [2021-06-30 11:52:18,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:18,521 INFO L482 AbstractCegarLoop]: Abstraction has 62763 states and 414590 transitions. [2021-06-30 11:52:18,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:18,521 INFO L276 IsEmpty]: Start isEmpty. Operand 62763 states and 414590 transitions. [2021-06-30 11:52:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:19,150 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:19,150 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:19,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-30 11:52:19,365 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:19,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2010260013, now seen corresponding path program 18 times [2021-06-30 11:52:19,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:19,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259750337] [2021-06-30 11:52:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:19,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:19,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259750337] [2021-06-30 11:52:19,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259750337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:19,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032319657] [2021-06-30 11:52:19,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:19,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:52:19,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:19,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:19,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:19,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032319657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:19,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:19,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602198170] [2021-06-30 11:52:19,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:19,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:19,480 INFO L87 Difference]: Start difference. First operand 62763 states and 414590 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:20,508 INFO L93 Difference]: Finished difference Result 68053 states and 445110 transitions. [2021-06-30 11:52:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:20,906 INFO L225 Difference]: With dead ends: 68053 [2021-06-30 11:52:20,907 INFO L226 Difference]: Without dead ends: 67997 [2021-06-30 11:52:20,907 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67997 states. [2021-06-30 11:52:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67997 to 63099. [2021-06-30 11:52:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63099 states, 63098 states have (on average 6.607562838758756) internal successors, (416924), 63098 states have internal predecessors, (416924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63099 states to 63099 states and 416924 transitions. [2021-06-30 11:52:23,776 INFO L78 Accepts]: Start accepts. Automaton has 63099 states and 416924 transitions. Word has length 29 [2021-06-30 11:52:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:23,776 INFO L482 AbstractCegarLoop]: Abstraction has 63099 states and 416924 transitions. [2021-06-30 11:52:23,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 63099 states and 416924 transitions. [2021-06-30 11:52:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:24,453 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:24,453 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:24,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-30 11:52:24,653 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash 774029079, now seen corresponding path program 19 times [2021-06-30 11:52:24,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:24,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891417218] [2021-06-30 11:52:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:24,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:24,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891417218] [2021-06-30 11:52:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891417218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:24,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43892856] [2021-06-30 11:52:24,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:24,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:24,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:24,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43892856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:24,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:24,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:24,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377423646] [2021-06-30 11:52:24,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:24,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:24,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:24,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:24,766 INFO L87 Difference]: Start difference. First operand 63099 states and 416924 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:25,841 INFO L93 Difference]: Finished difference Result 68973 states and 451840 transitions. [2021-06-30 11:52:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:25,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:26,236 INFO L225 Difference]: With dead ends: 68973 [2021-06-30 11:52:26,236 INFO L226 Difference]: Without dead ends: 68951 [2021-06-30 11:52:26,236 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68951 states. [2021-06-30 11:52:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68951 to 64635. [2021-06-30 11:52:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64635 states, 64634 states have (on average 6.617445926292663) internal successors, (427712), 64634 states have internal predecessors, (427712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64635 states to 64635 states and 427712 transitions. [2021-06-30 11:52:29,600 INFO L78 Accepts]: Start accepts. Automaton has 64635 states and 427712 transitions. Word has length 29 [2021-06-30 11:52:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:29,600 INFO L482 AbstractCegarLoop]: Abstraction has 64635 states and 427712 transitions. [2021-06-30 11:52:29,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 64635 states and 427712 transitions. [2021-06-30 11:52:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:30,147 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:30,147 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:30,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-30 11:52:30,372 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:30,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1217088791, now seen corresponding path program 20 times [2021-06-30 11:52:30,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:30,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109318115] [2021-06-30 11:52:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:30,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:30,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109318115] [2021-06-30 11:52:30,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109318115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:30,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377687319] [2021-06-30 11:52:30,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:30,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:52:30,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:30,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377687319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:30,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:30,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:30,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909871745] [2021-06-30 11:52:30,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:30,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:30,531 INFO L87 Difference]: Start difference. First operand 64635 states and 427712 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:31,844 INFO L93 Difference]: Finished difference Result 70683 states and 463638 transitions. [2021-06-30 11:52:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:31,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:32,517 INFO L225 Difference]: With dead ends: 70683 [2021-06-30 11:52:32,517 INFO L226 Difference]: Without dead ends: 70575 [2021-06-30 11:52:32,517 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70575 states. [2021-06-30 11:52:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70575 to 66139. [2021-06-30 11:52:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66139 states, 66138 states have (on average 6.626931567328918) internal successors, (438292), 66138 states have internal predecessors, (438292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66139 states to 66139 states and 438292 transitions. [2021-06-30 11:52:36,005 INFO L78 Accepts]: Start accepts. Automaton has 66139 states and 438292 transitions. Word has length 29 [2021-06-30 11:52:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:36,005 INFO L482 AbstractCegarLoop]: Abstraction has 66139 states and 438292 transitions. [2021-06-30 11:52:36,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 66139 states and 438292 transitions. [2021-06-30 11:52:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:36,264 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:36,264 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:36,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-30 11:52:36,465 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash 418951793, now seen corresponding path program 4 times [2021-06-30 11:52:36,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:36,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574577373] [2021-06-30 11:52:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:36,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:36,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574577373] [2021-06-30 11:52:36,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574577373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:36,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076750148] [2021-06-30 11:52:36,515 INFO L93 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:36,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:52:36,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:36,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:36,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:36,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076750148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:36,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:36,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:36,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375890086] [2021-06-30 11:52:36,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:36,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:36,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:36,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:36,652 INFO L87 Difference]: Start difference. First operand 66139 states and 438292 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:38,234 INFO L93 Difference]: Finished difference Result 70431 states and 462692 transitions. [2021-06-30 11:52:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:38,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:38,938 INFO L225 Difference]: With dead ends: 70431 [2021-06-30 11:52:38,938 INFO L226 Difference]: Without dead ends: 70323 [2021-06-30 11:52:38,938 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70323 states. [2021-06-30 11:52:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70323 to 66816. [2021-06-30 11:52:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66816 states, 66815 states have (on average 6.628302027987727) internal successors, (442870), 66815 states have internal predecessors, (442870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66816 states to 66816 states and 442870 transitions. [2021-06-30 11:52:43,713 INFO L78 Accepts]: Start accepts. Automaton has 66816 states and 442870 transitions. Word has length 29 [2021-06-30 11:52:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:43,714 INFO L482 AbstractCegarLoop]: Abstraction has 66816 states and 442870 transitions. [2021-06-30 11:52:43,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 66816 states and 442870 transitions. [2021-06-30 11:52:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:43,961 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:43,961 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:44,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:44,162 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash -418269971, now seen corresponding path program 5 times [2021-06-30 11:52:44,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:44,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557288897] [2021-06-30 11:52:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:44,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:44,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557288897] [2021-06-30 11:52:44,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557288897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:44,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731888508] [2021-06-30 11:52:44,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:44,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:52:44,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:44,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:44,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:52:44,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731888508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:44,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:44,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:52:44,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825927403] [2021-06-30 11:52:44,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:52:44,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:52:44,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:44,268 INFO L87 Difference]: Start difference. First operand 66816 states and 442870 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:45,346 INFO L93 Difference]: Finished difference Result 70784 states and 465520 transitions. [2021-06-30 11:52:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:52:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:46,034 INFO L225 Difference]: With dead ends: 70784 [2021-06-30 11:52:46,034 INFO L226 Difference]: Without dead ends: 70699 [2021-06-30 11:52:46,035 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:52:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70699 states. [2021-06-30 11:52:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70699 to 67874. [2021-06-30 11:52:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67874 states, 67873 states have (on average 6.622058845196175) internal successors, (449459), 67873 states have internal predecessors, (449459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67874 states to 67874 states and 449459 transitions. [2021-06-30 11:52:49,215 INFO L78 Accepts]: Start accepts. Automaton has 67874 states and 449459 transitions. Word has length 29 [2021-06-30 11:52:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:49,215 INFO L482 AbstractCegarLoop]: Abstraction has 67874 states and 449459 transitions. [2021-06-30 11:52:49,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 67874 states and 449459 transitions. [2021-06-30 11:52:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:49,934 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:49,934 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:50,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-30 11:52:50,155 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash 367019615, now seen corresponding path program 6 times [2021-06-30 11:52:50,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:50,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896106980] [2021-06-30 11:52:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:50,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896106980] [2021-06-30 11:52:50,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896106980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367915733] [2021-06-30 11:52:50,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:50,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:52:50,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:52:50,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:52:50,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:52:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:52:50,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367915733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:52:50,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:52:50,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:52:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568440485] [2021-06-30 11:52:50,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:52:50,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:50,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:52:50,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:50,266 INFO L87 Difference]: Start difference. First operand 67874 states and 449459 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:51,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:51,306 INFO L93 Difference]: Finished difference Result 71899 states and 471951 transitions. [2021-06-30 11:52:51,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:52:51,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:51,751 INFO L225 Difference]: With dead ends: 71899 [2021-06-30 11:52:51,752 INFO L226 Difference]: Without dead ends: 71644 [2021-06-30 11:52:51,752 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:52:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71644 states. [2021-06-30 11:52:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71644 to 66063. [2021-06-30 11:52:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66063 states, 66062 states have (on average 6.628122067149042) internal successors, (437867), 66062 states have internal predecessors, (437867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66063 states to 66063 states and 437867 transitions. [2021-06-30 11:52:55,587 INFO L78 Accepts]: Start accepts. Automaton has 66063 states and 437867 transitions. Word has length 29 [2021-06-30 11:52:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:52:55,587 INFO L482 AbstractCegarLoop]: Abstraction has 66063 states and 437867 transitions. [2021-06-30 11:52:55,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 66063 states and 437867 transitions. [2021-06-30 11:52:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:52:56,069 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:52:56,069 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:52:56,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:52:56,293 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:52:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:52:56,293 INFO L82 PathProgramCache]: Analyzing trace with hash -989712463, now seen corresponding path program 7 times [2021-06-30 11:52:56,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:52:56,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516833589] [2021-06-30 11:52:56,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:52:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:52:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:52:56,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:52:56,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516833589] [2021-06-30 11:52:56,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516833589] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:52:56,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:52:56,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:52:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513230037] [2021-06-30 11:52:56,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:52:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:52:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:52:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:52:56,344 INFO L87 Difference]: Start difference. First operand 66063 states and 437867 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:52:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:52:57,966 INFO L93 Difference]: Finished difference Result 69133 states and 455150 transitions. [2021-06-30 11:52:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:52:57,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:52:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:52:58,358 INFO L225 Difference]: With dead ends: 69133 [2021-06-30 11:52:58,358 INFO L226 Difference]: Without dead ends: 69117 [2021-06-30 11:52:58,358 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:52:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69117 states. [2021-06-30 11:53:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69117 to 66609. [2021-06-30 11:53:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66609 states, 66608 states have (on average 6.6259458323324525) internal successors, (441341), 66608 states have internal predecessors, (441341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66609 states to 66609 states and 441341 transitions. [2021-06-30 11:53:01,738 INFO L78 Accepts]: Start accepts. Automaton has 66609 states and 441341 transitions. Word has length 29 [2021-06-30 11:53:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:01,739 INFO L482 AbstractCegarLoop]: Abstraction has 66609 states and 441341 transitions. [2021-06-30 11:53:01,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 66609 states and 441341 transitions. [2021-06-30 11:53:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:01,984 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:01,984 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:01,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-06-30 11:53:01,985 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:01,985 INFO L82 PathProgramCache]: Analyzing trace with hash 805729517, now seen corresponding path program 8 times [2021-06-30 11:53:01,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:01,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544292213] [2021-06-30 11:53:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:53:02,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:02,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544292213] [2021-06-30 11:53:02,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544292213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:02,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912532123] [2021-06-30 11:53:02,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:02,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:53:02,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:02,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:53:02,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912532123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:02,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:02,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:02,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969562847] [2021-06-30 11:53:02,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:02,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:02,088 INFO L87 Difference]: Start difference. First operand 66609 states and 441341 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:03,142 INFO L93 Difference]: Finished difference Result 70855 states and 465145 transitions. [2021-06-30 11:53:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:03,925 INFO L225 Difference]: With dead ends: 70855 [2021-06-30 11:53:03,925 INFO L226 Difference]: Without dead ends: 70729 [2021-06-30 11:53:03,926 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70729 states. [2021-06-30 11:53:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70729 to 66678. [2021-06-30 11:53:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66678 states, 66677 states have (on average 6.630322300043494) internal successors, (442090), 66677 states have internal predecessors, (442090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66678 states to 66678 states and 442090 transitions. [2021-06-30 11:53:06,979 INFO L78 Accepts]: Start accepts. Automaton has 66678 states and 442090 transitions. Word has length 29 [2021-06-30 11:53:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:06,979 INFO L482 AbstractCegarLoop]: Abstraction has 66678 states and 442090 transitions. [2021-06-30 11:53:06,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 66678 states and 442090 transitions. [2021-06-30 11:53:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:07,234 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:07,234 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:07,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:07,435 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:07,435 INFO L82 PathProgramCache]: Analyzing trace with hash -593051091, now seen corresponding path program 9 times [2021-06-30 11:53:07,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:07,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147662848] [2021-06-30 11:53:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:07,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:07,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147662848] [2021-06-30 11:53:07,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147662848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:07,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402764072] [2021-06-30 11:53:07,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:07,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:53:07,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:07,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:07,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:07,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402764072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:07,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:07,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:07,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392509581] [2021-06-30 11:53:07,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:07,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:07,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:07,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:07,549 INFO L87 Difference]: Start difference. First operand 66678 states and 442090 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:08,894 INFO L93 Difference]: Finished difference Result 69986 states and 460805 transitions. [2021-06-30 11:53:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:08,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:09,379 INFO L225 Difference]: With dead ends: 69986 [2021-06-30 11:53:09,380 INFO L226 Difference]: Without dead ends: 69925 [2021-06-30 11:53:09,380 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69925 states. [2021-06-30 11:53:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69925 to 67243. [2021-06-30 11:53:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67243 states, 67242 states have (on average 6.628238303441302) internal successors, (445696), 67242 states have internal predecessors, (445696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67243 states to 67243 states and 445696 transitions. [2021-06-30 11:53:12,579 INFO L78 Accepts]: Start accepts. Automaton has 67243 states and 445696 transitions. Word has length 29 [2021-06-30 11:53:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:12,579 INFO L482 AbstractCegarLoop]: Abstraction has 67243 states and 445696 transitions. [2021-06-30 11:53:12,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 67243 states and 445696 transitions. [2021-06-30 11:53:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:13,265 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:13,265 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:13,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-30 11:53:13,489 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:13,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:13,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1750161303, now seen corresponding path program 10 times [2021-06-30 11:53:13,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:13,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163121489] [2021-06-30 11:53:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:13,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:13,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163121489] [2021-06-30 11:53:13,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163121489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:13,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657382422] [2021-06-30 11:53:13,543 INFO L93 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:13,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:53:13,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:13,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657382422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:13,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:13,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:13,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891908400] [2021-06-30 11:53:13,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:13,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:13,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:13,618 INFO L87 Difference]: Start difference. First operand 67243 states and 445696 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:14,621 INFO L93 Difference]: Finished difference Result 71013 states and 467211 transitions. [2021-06-30 11:53:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:14,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:15,531 INFO L225 Difference]: With dead ends: 71013 [2021-06-30 11:53:15,531 INFO L226 Difference]: Without dead ends: 70952 [2021-06-30 11:53:15,531 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70952 states. [2021-06-30 11:53:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70952 to 67508. [2021-06-30 11:53:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67508 states, 67507 states have (on average 6.627697868369206) internal successors, (447416), 67507 states have internal predecessors, (447416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67508 states to 67508 states and 447416 transitions. [2021-06-30 11:53:19,093 INFO L78 Accepts]: Start accepts. Automaton has 67508 states and 447416 transitions. Word has length 29 [2021-06-30 11:53:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:19,093 INFO L482 AbstractCegarLoop]: Abstraction has 67508 states and 447416 transitions. [2021-06-30 11:53:19,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 67508 states and 447416 transitions. [2021-06-30 11:53:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:19,311 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:19,311 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:19,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-30 11:53:19,512 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1758726239, now seen corresponding path program 11 times [2021-06-30 11:53:19,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:19,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049705311] [2021-06-30 11:53:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:20,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:20,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049705311] [2021-06-30 11:53:20,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049705311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:20,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264885877] [2021-06-30 11:53:20,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:20,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:53:20,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:20,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264885877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:20,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:20,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:20,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725888516] [2021-06-30 11:53:20,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:20,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:20,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:20,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:20,086 INFO L87 Difference]: Start difference. First operand 67508 states and 447416 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:21,095 INFO L93 Difference]: Finished difference Result 71814 states and 472312 transitions. [2021-06-30 11:53:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:21,517 INFO L225 Difference]: With dead ends: 71814 [2021-06-30 11:53:21,517 INFO L226 Difference]: Without dead ends: 71778 [2021-06-30 11:53:21,517 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71778 states. [2021-06-30 11:53:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71778 to 68524. [2021-06-30 11:53:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68524 states, 68523 states have (on average 6.62614012813216) internal successors, (454043), 68523 states have internal predecessors, (454043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68524 states to 68524 states and 454043 transitions. [2021-06-30 11:53:25,137 INFO L78 Accepts]: Start accepts. Automaton has 68524 states and 454043 transitions. Word has length 29 [2021-06-30 11:53:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:25,138 INFO L482 AbstractCegarLoop]: Abstraction has 68524 states and 454043 transitions. [2021-06-30 11:53:25,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 68524 states and 454043 transitions. [2021-06-30 11:53:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:25,391 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:25,391 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:25,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-30 11:53:25,591 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:25,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1899061379, now seen corresponding path program 12 times [2021-06-30 11:53:25,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:25,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912540370] [2021-06-30 11:53:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:25,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:25,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912540370] [2021-06-30 11:53:25,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912540370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:25,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363812349] [2021-06-30 11:53:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:25,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:53:25,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:25,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363812349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:25,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:25,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220940120] [2021-06-30 11:53:25,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:25,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:25,712 INFO L87 Difference]: Start difference. First operand 68524 states and 454043 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:26,779 INFO L93 Difference]: Finished difference Result 72269 states and 475642 transitions. [2021-06-30 11:53:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:26,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:27,517 INFO L225 Difference]: With dead ends: 72269 [2021-06-30 11:53:27,518 INFO L226 Difference]: Without dead ends: 72253 [2021-06-30 11:53:27,518 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72253 states. [2021-06-30 11:53:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72253 to 69271. [2021-06-30 11:53:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69271 states, 69270 states have (on average 6.629002454164862) internal successors, (459191), 69270 states have internal predecessors, (459191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69271 states to 69271 states and 459191 transitions. [2021-06-30 11:53:30,575 INFO L78 Accepts]: Start accepts. Automaton has 69271 states and 459191 transitions. Word has length 29 [2021-06-30 11:53:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:30,575 INFO L482 AbstractCegarLoop]: Abstraction has 69271 states and 459191 transitions. [2021-06-30 11:53:30,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 69271 states and 459191 transitions. [2021-06-30 11:53:30,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:30,800 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:30,800 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:31,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-30 11:53:31,001 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:31,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2074934847, now seen corresponding path program 13 times [2021-06-30 11:53:31,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:31,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086422876] [2021-06-30 11:53:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:31,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:31,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086422876] [2021-06-30 11:53:31,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086422876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:31,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911398638] [2021-06-30 11:53:31,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:31,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:31,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:31,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911398638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:31,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:31,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:31,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685923959] [2021-06-30 11:53:31,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:31,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:31,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:31,151 INFO L87 Difference]: Start difference. First operand 69271 states and 459191 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:32,579 INFO L93 Difference]: Finished difference Result 73806 states and 484735 transitions. [2021-06-30 11:53:32,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:32,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:32,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:33,046 INFO L225 Difference]: With dead ends: 73806 [2021-06-30 11:53:33,046 INFO L226 Difference]: Without dead ends: 73680 [2021-06-30 11:53:33,046 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73680 states. [2021-06-30 11:53:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73680 to 69014. [2021-06-30 11:53:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69014 states, 69013 states have (on average 6.627475982785852) internal successors, (457382), 69013 states have internal predecessors, (457382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69014 states to 69014 states and 457382 transitions. [2021-06-30 11:53:36,581 INFO L78 Accepts]: Start accepts. Automaton has 69014 states and 457382 transitions. Word has length 29 [2021-06-30 11:53:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:36,581 INFO L482 AbstractCegarLoop]: Abstraction has 69014 states and 457382 transitions. [2021-06-30 11:53:36,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 69014 states and 457382 transitions. [2021-06-30 11:53:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:36,845 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:36,846 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:37,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-30 11:53:37,047 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1176017729, now seen corresponding path program 14 times [2021-06-30 11:53:37,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:37,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553053516] [2021-06-30 11:53:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:53:37,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:37,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553053516] [2021-06-30 11:53:37,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553053516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:37,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488743304] [2021-06-30 11:53:37,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:37,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:53:37,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:37,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:37,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:53:37,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488743304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:37,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:37,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:53:37,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87099772] [2021-06-30 11:53:37,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:53:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:53:37,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:53:37,151 INFO L87 Difference]: Start difference. First operand 69014 states and 457382 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:38,418 INFO L93 Difference]: Finished difference Result 72558 states and 477447 transitions. [2021-06-30 11:53:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:53:38,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:39,163 INFO L225 Difference]: With dead ends: 72558 [2021-06-30 11:53:39,163 INFO L226 Difference]: Without dead ends: 72517 [2021-06-30 11:53:39,165 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:53:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72517 states. [2021-06-30 11:53:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72517 to 69705. [2021-06-30 11:53:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69705 states, 69704 states have (on average 6.626219442212785) internal successors, (461874), 69704 states have internal predecessors, (461874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69705 states to 69705 states and 461874 transitions. [2021-06-30 11:53:43,007 INFO L78 Accepts]: Start accepts. Automaton has 69705 states and 461874 transitions. Word has length 29 [2021-06-30 11:53:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:43,007 INFO L482 AbstractCegarLoop]: Abstraction has 69705 states and 461874 transitions. [2021-06-30 11:53:43,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 69705 states and 461874 transitions. [2021-06-30 11:53:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:43,276 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:43,276 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:43,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:43,481 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash -249865201, now seen corresponding path program 15 times [2021-06-30 11:53:43,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:43,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045516810] [2021-06-30 11:53:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:43,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:43,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045516810] [2021-06-30 11:53:43,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045516810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:43,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186579624] [2021-06-30 11:53:43,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:43,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:53:43,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:43,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:43,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:43,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186579624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:43,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:43,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:43,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747349363] [2021-06-30 11:53:43,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:43,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:43,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:43,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:43,596 INFO L87 Difference]: Start difference. First operand 69705 states and 461874 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:44,720 INFO L93 Difference]: Finished difference Result 74005 states and 485989 transitions. [2021-06-30 11:53:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:45,508 INFO L225 Difference]: With dead ends: 74005 [2021-06-30 11:53:45,509 INFO L226 Difference]: Without dead ends: 73872 [2021-06-30 11:53:45,509 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73872 states. [2021-06-30 11:53:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73872 to 69683. [2021-06-30 11:53:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69683 states, 69682 states have (on average 6.628153612123647) internal successors, (461863), 69682 states have internal predecessors, (461863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69683 states to 69683 states and 461863 transitions. [2021-06-30 11:53:48,769 INFO L78 Accepts]: Start accepts. Automaton has 69683 states and 461863 transitions. Word has length 29 [2021-06-30 11:53:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:48,769 INFO L482 AbstractCegarLoop]: Abstraction has 69683 states and 461863 transitions. [2021-06-30 11:53:48,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 69683 states and 461863 transitions. [2021-06-30 11:53:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:49,497 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:49,497 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:49,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:49,723 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -334660475, now seen corresponding path program 16 times [2021-06-30 11:53:49,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:49,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579130078] [2021-06-30 11:53:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:49,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:49,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579130078] [2021-06-30 11:53:49,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579130078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:49,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659447563] [2021-06-30 11:53:49,768 INFO L93 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:49,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:53:49,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:53:49,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659447563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:49,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:49,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:53:49,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4153697] [2021-06-30 11:53:49,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:53:49,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:53:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:49,836 INFO L87 Difference]: Start difference. First operand 69683 states and 461863 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:50,862 INFO L93 Difference]: Finished difference Result 75185 states and 493498 transitions. [2021-06-30 11:53:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:53:50,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:51,323 INFO L225 Difference]: With dead ends: 75185 [2021-06-30 11:53:51,323 INFO L226 Difference]: Without dead ends: 75034 [2021-06-30 11:53:51,324 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:53:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75034 states. [2021-06-30 11:53:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75034 to 71296. [2021-06-30 11:53:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71296 states, 71295 states have (on average 6.622189494354442) internal successors, (472129), 71295 states have internal predecessors, (472129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71296 states to 71296 states and 472129 transitions. [2021-06-30 11:53:55,024 INFO L78 Accepts]: Start accepts. Automaton has 71296 states and 472129 transitions. Word has length 29 [2021-06-30 11:53:55,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:53:55,024 INFO L482 AbstractCegarLoop]: Abstraction has 71296 states and 472129 transitions. [2021-06-30 11:53:55,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 71296 states and 472129 transitions. [2021-06-30 11:53:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:53:55,283 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:53:55,283 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:53:55,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-30 11:53:55,483 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:53:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:53:55,484 INFO L82 PathProgramCache]: Analyzing trace with hash -675215887, now seen corresponding path program 17 times [2021-06-30 11:53:55,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:53:55,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146269761] [2021-06-30 11:53:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:53:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:53:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:55,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:53:55,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146269761] [2021-06-30 11:53:55,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146269761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:55,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794819090] [2021-06-30 11:53:55,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:53:55,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:53:55,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:53:55,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:53:55,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:53:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:53:55,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794819090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:53:55,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:53:55,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:53:55,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898086094] [2021-06-30 11:53:55,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:53:55,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:53:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:53:55,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:55,599 INFO L87 Difference]: Start difference. First operand 71296 states and 472129 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:53:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:53:57,087 INFO L93 Difference]: Finished difference Result 76487 states and 502231 transitions. [2021-06-30 11:53:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:53:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:53:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:53:57,549 INFO L225 Difference]: With dead ends: 76487 [2021-06-30 11:53:57,549 INFO L226 Difference]: Without dead ends: 76299 [2021-06-30 11:53:57,549 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:53:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76299 states. [2021-06-30 11:54:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76299 to 71663. [2021-06-30 11:54:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71663 states, 71662 states have (on average 6.625212804554716) internal successors, (474776), 71662 states have internal predecessors, (474776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71663 states to 71663 states and 474776 transitions. [2021-06-30 11:54:01,316 INFO L78 Accepts]: Start accepts. Automaton has 71663 states and 474776 transitions. Word has length 29 [2021-06-30 11:54:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:01,316 INFO L482 AbstractCegarLoop]: Abstraction has 71663 states and 474776 transitions. [2021-06-30 11:54:01,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 71663 states and 474776 transitions. [2021-06-30 11:54:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:54:01,585 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:01,585 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:01,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:01,786 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:01,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:01,786 INFO L82 PathProgramCache]: Analyzing trace with hash -783754733, now seen corresponding path program 18 times [2021-06-30 11:54:01,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:01,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069383102] [2021-06-30 11:54:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:01,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:01,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069383102] [2021-06-30 11:54:01,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069383102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:01,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983489715] [2021-06-30 11:54:01,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:01,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:54:01,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:54:01,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:01,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:01,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983489715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:01,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:01,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:01,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761182225] [2021-06-30 11:54:01,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:01,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:01,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:01,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:01,902 INFO L87 Difference]: Start difference. First operand 71663 states and 474776 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:03,330 INFO L93 Difference]: Finished difference Result 76334 states and 501492 transitions. [2021-06-30 11:54:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:54:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:54:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:04,050 INFO L225 Difference]: With dead ends: 76334 [2021-06-30 11:54:04,050 INFO L226 Difference]: Without dead ends: 76246 [2021-06-30 11:54:04,050 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76246 states. [2021-06-30 11:54:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76246 to 71957. [2021-06-30 11:54:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71957 states, 71956 states have (on average 6.62578520206793) internal successors, (476765), 71956 states have internal predecessors, (476765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71957 states to 71957 states and 476765 transitions. [2021-06-30 11:54:07,894 INFO L78 Accepts]: Start accepts. Automaton has 71957 states and 476765 transitions. Word has length 29 [2021-06-30 11:54:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:07,895 INFO L482 AbstractCegarLoop]: Abstraction has 71957 states and 476765 transitions. [2021-06-30 11:54:07,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 71957 states and 476765 transitions. [2021-06-30 11:54:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:54:08,154 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:08,154 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:08,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:08,355 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1940864945, now seen corresponding path program 19 times [2021-06-30 11:54:08,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:08,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875649127] [2021-06-30 11:54:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:08,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:08,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875649127] [2021-06-30 11:54:08,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875649127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:08,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033721141] [2021-06-30 11:54:08,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:08,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:08,864 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-30 11:54:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:08,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033721141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:08,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:08,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:08,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094437456] [2021-06-30 11:54:08,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:08,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:08,897 INFO L87 Difference]: Start difference. First operand 71957 states and 476765 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:09,946 INFO L93 Difference]: Finished difference Result 77007 states and 506486 transitions. [2021-06-30 11:54:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:54:09,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:54:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:10,400 INFO L225 Difference]: With dead ends: 77007 [2021-06-30 11:54:10,400 INFO L226 Difference]: Without dead ends: 76973 [2021-06-30 11:54:10,400 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:11,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76973 states. [2021-06-30 11:54:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76973 to 73307. [2021-06-30 11:54:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73307 states, 73306 states have (on average 6.629470984639729) internal successors, (485980), 73306 states have internal predecessors, (485980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73307 states to 73307 states and 485980 transitions. [2021-06-30 11:54:14,100 INFO L78 Accepts]: Start accepts. Automaton has 73307 states and 485980 transitions. Word has length 29 [2021-06-30 11:54:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:14,100 INFO L482 AbstractCegarLoop]: Abstraction has 73307 states and 485980 transitions. [2021-06-30 11:54:14,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 73307 states and 485980 transitions. [2021-06-30 11:54:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:54:14,366 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:14,366 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:14,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:14,567 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:14,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1568022597, now seen corresponding path program 20 times [2021-06-30 11:54:14,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:14,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884492751] [2021-06-30 11:54:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:14,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:14,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884492751] [2021-06-30 11:54:14,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884492751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:14,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847372909] [2021-06-30 11:54:14,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:14,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:54:14,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:54:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:14,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:14,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847372909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:14,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:14,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:14,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119488530] [2021-06-30 11:54:14,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:14,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:14,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:14,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:14,681 INFO L87 Difference]: Start difference. First operand 73307 states and 485980 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:16,139 INFO L93 Difference]: Finished difference Result 78624 states and 516991 transitions. [2021-06-30 11:54:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:54:16,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:54:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:16,636 INFO L225 Difference]: With dead ends: 78624 [2021-06-30 11:54:16,636 INFO L226 Difference]: Without dead ends: 78516 [2021-06-30 11:54:16,636 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78516 states. [2021-06-30 11:54:19,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78516 to 74617. [2021-06-30 11:54:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74617 states, 74616 states have (on average 6.633523641042136) internal successors, (494967), 74616 states have internal predecessors, (494967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74617 states to 74617 states and 494967 transitions. [2021-06-30 11:54:20,655 INFO L78 Accepts]: Start accepts. Automaton has 74617 states and 494967 transitions. Word has length 29 [2021-06-30 11:54:20,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:20,655 INFO L482 AbstractCegarLoop]: Abstraction has 74617 states and 494967 transitions. [2021-06-30 11:54:20,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 74617 states and 494967 transitions. [2021-06-30 11:54:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:54:20,979 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:20,979 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:21,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:21,180 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1512842313, now seen corresponding path program 12 times [2021-06-30 11:54:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:21,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546665579] [2021-06-30 11:54:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:21,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:21,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546665579] [2021-06-30 11:54:21,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546665579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:21,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678616348] [2021-06-30 11:54:21,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:21,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:54:21,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:54:21,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:21,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:21,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678616348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:21,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:21,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:21,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015800973] [2021-06-30 11:54:21,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:21,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:21,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:21,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:21,314 INFO L87 Difference]: Start difference. First operand 74617 states and 494967 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:22,902 INFO L93 Difference]: Finished difference Result 82475 states and 541875 transitions. [2021-06-30 11:54:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:54:22,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:54:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:23,417 INFO L225 Difference]: With dead ends: 82475 [2021-06-30 11:54:23,417 INFO L226 Difference]: Without dead ends: 82285 [2021-06-30 11:54:23,417 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82285 states. [2021-06-30 11:54:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82285 to 77362. [2021-06-30 11:54:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77362 states, 77361 states have (on average 6.639844366024224) internal successors, (513665), 77361 states have internal predecessors, (513665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77362 states to 77362 states and 513665 transitions. [2021-06-30 11:54:27,756 INFO L78 Accepts]: Start accepts. Automaton has 77362 states and 513665 transitions. Word has length 29 [2021-06-30 11:54:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:27,756 INFO L482 AbstractCegarLoop]: Abstraction has 77362 states and 513665 transitions. [2021-06-30 11:54:27,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 77362 states and 513665 transitions. [2021-06-30 11:54:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:54:28,199 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:28,199 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:28,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-30 11:54:28,413 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash -173602917, now seen corresponding path program 12 times [2021-06-30 11:54:28,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:28,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626559116] [2021-06-30 11:54:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:28,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:28,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626559116] [2021-06-30 11:54:28,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626559116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:28,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183065980] [2021-06-30 11:54:28,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:28,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:54:28,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:54:28,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:28,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:28,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183065980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:28,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:28,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:28,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196969337] [2021-06-30 11:54:28,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:28,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:28,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:28,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:28,596 INFO L87 Difference]: Start difference. First operand 77362 states and 513665 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:30,317 INFO L93 Difference]: Finished difference Result 83792 states and 551632 transitions. [2021-06-30 11:54:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:54:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:54:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:31,199 INFO L225 Difference]: With dead ends: 83792 [2021-06-30 11:54:31,200 INFO L226 Difference]: Without dead ends: 83553 [2021-06-30 11:54:31,200 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83553 states. [2021-06-30 11:54:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83553 to 79482. [2021-06-30 11:54:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79482 states, 79481 states have (on average 6.6403291352650315) internal successors, (527780), 79481 states have internal predecessors, (527780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79482 states to 79482 states and 527780 transitions. [2021-06-30 11:54:35,471 INFO L78 Accepts]: Start accepts. Automaton has 79482 states and 527780 transitions. Word has length 29 [2021-06-30 11:54:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:35,471 INFO L482 AbstractCegarLoop]: Abstraction has 79482 states and 527780 transitions. [2021-06-30 11:54:35,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 79482 states and 527780 transitions. [2021-06-30 11:54:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:54:35,770 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:35,770 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:35,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-30 11:54:35,970 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:35,971 INFO L82 PathProgramCache]: Analyzing trace with hash -217486561, now seen corresponding path program 19 times [2021-06-30 11:54:35,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:35,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538189941] [2021-06-30 11:54:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:54:36,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:36,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538189941] [2021-06-30 11:54:36,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538189941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:36,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016539948] [2021-06-30 11:54:36,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:36,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:36,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:54:36,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016539948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:36,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:36,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:36,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118879001] [2021-06-30 11:54:36,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:36,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:36,624 INFO L87 Difference]: Start difference. First operand 79482 states and 527780 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:37,772 INFO L93 Difference]: Finished difference Result 86974 states and 572662 transitions. [2021-06-30 11:54:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:54:37,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:54:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:38,299 INFO L225 Difference]: With dead ends: 86974 [2021-06-30 11:54:38,299 INFO L226 Difference]: Without dead ends: 86742 [2021-06-30 11:54:38,300 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86742 states. [2021-06-30 11:54:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86742 to 82072. [2021-06-30 11:54:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82072 states, 82071 states have (on average 6.646294062458115) internal successors, (545468), 82071 states have internal predecessors, (545468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82072 states to 82072 states and 545468 transitions. [2021-06-30 11:54:42,830 INFO L78 Accepts]: Start accepts. Automaton has 82072 states and 545468 transitions. Word has length 29 [2021-06-30 11:54:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:42,830 INFO L482 AbstractCegarLoop]: Abstraction has 82072 states and 545468 transitions. [2021-06-30 11:54:42,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 82072 states and 545468 transitions. [2021-06-30 11:54:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:54:43,180 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:43,180 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:43,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-30 11:54:43,381 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:43,381 INFO L82 PathProgramCache]: Analyzing trace with hash 888311863, now seen corresponding path program 13 times [2021-06-30 11:54:43,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:43,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365039770] [2021-06-30 11:54:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:43,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365039770] [2021-06-30 11:54:43,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365039770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545896166] [2021-06-30 11:54:43,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:43,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:43,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:43,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545896166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:43,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:43,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:43,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320364578] [2021-06-30 11:54:43,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:43,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:43,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:43,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:43,520 INFO L87 Difference]: Start difference. First operand 82072 states and 545468 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:44,773 INFO L93 Difference]: Finished difference Result 92227 states and 607723 transitions. [2021-06-30 11:54:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:54:44,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:54:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:45,671 INFO L225 Difference]: With dead ends: 92227 [2021-06-30 11:54:45,671 INFO L226 Difference]: Without dead ends: 92196 [2021-06-30 11:54:45,672 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92196 states. [2021-06-30 11:54:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92196 to 86647. [2021-06-30 11:54:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86647 states, 86646 states have (on average 6.6496433764974725) internal successors, (576165), 86646 states have internal predecessors, (576165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86647 states to 86647 states and 576165 transitions. [2021-06-30 11:54:49,913 INFO L78 Accepts]: Start accepts. Automaton has 86647 states and 576165 transitions. Word has length 29 [2021-06-30 11:54:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:54:49,913 INFO L482 AbstractCegarLoop]: Abstraction has 86647 states and 576165 transitions. [2021-06-30 11:54:49,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:49,913 INFO L276 IsEmpty]: Start isEmpty. Operand 86647 states and 576165 transitions. [2021-06-30 11:54:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 11:54:50,767 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:54:50,767 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:54:50,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:50,989 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:54:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:54:50,989 INFO L82 PathProgramCache]: Analyzing trace with hash -922114701, now seen corresponding path program 14 times [2021-06-30 11:54:50,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:54:50,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512187656] [2021-06-30 11:54:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:54:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:54:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:51,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:54:51,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512187656] [2021-06-30 11:54:51,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512187656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:51,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436408692] [2021-06-30 11:54:51,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:54:51,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:54:51,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:54:51,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:54:51,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:54:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:54:51,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436408692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:54:51,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:54:51,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:54:51,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795405813] [2021-06-30 11:54:51,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:54:51,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:54:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:54:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:51,102 INFO L87 Difference]: Start difference. First operand 86647 states and 576165 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:54:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:54:52,503 INFO L93 Difference]: Finished difference Result 96184 states and 634165 transitions. [2021-06-30 11:54:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:54:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 11:54:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:54:53,567 INFO L225 Difference]: With dead ends: 96184 [2021-06-30 11:54:53,567 INFO L226 Difference]: Without dead ends: 96079 [2021-06-30 11:54:53,567 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:54:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96079 states. [2021-06-30 11:54:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96079 to 89960. [2021-06-30 11:54:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89960 states, 89959 states have (on average 6.66077879923076) internal successors, (599197), 89959 states have internal predecessors, (599197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)