/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/add-sub09.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:53:33,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:53:33,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:53:33,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:53:33,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:53:33,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:53:33,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:53:33,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:53:33,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:53:33,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:53:33,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:53:33,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:53:33,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:53:33,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:53:33,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:53:33,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:53:33,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:53:33,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:53:33,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:53:33,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:53:33,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:53:33,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:53:33,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:53:33,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:53:33,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 18:53:33,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 18:53:33,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 18:53:33,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 18:53:33,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 18:53:33,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-08-21 18:53:33,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:53:33,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:53:33,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:53:33,495 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-Delay.epf [2021-08-21 18:53:33,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:53:33,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:53:33,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:53:33,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:53:33,538 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:53:33,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:53:33,539 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:53:33,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:53:33,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:53:33,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:53:33,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:53:33,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:53:33,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:53:33,541 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:53:33,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:53:33,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:53:33,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:53:33,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:53:33,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:53:33,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:53:33,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:53:33,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:53:33,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:53:33,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:53:33,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:53:33,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:53:33,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:53:33,557 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:53:33,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:53:33,557 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:53:33,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:53:33,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:53:33,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:53:33,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:53:33,927 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:53:33,928 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:53:33,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub09.bpl [2021-08-21 18:53:33,930 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub09.bpl' [2021-08-21 18:53:33,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:53:33,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:53:33,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:53:33,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:53:33,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:53:33,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:33,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:33,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:53:33,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:53:33,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:53:33,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:53:33,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:33,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:34,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:34,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:34,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:34,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:34,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:34,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:53:34,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:53:34,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:53:34,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:53:34,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/1) ... [2021-08-21 18:53:34,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:53:34,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:34,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 18:53:34,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 18:53:34,090 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:53:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:53:34,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:53:34,090 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 18:53:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 18:53:34,091 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 18:53:34,091 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:53:34,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:53:34,214 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 18:53:34,216 INFO L202 PluginConnector]: Adding new model add-sub09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:53:34 BoogieIcfgContainer [2021-08-21 18:53:34,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:53:34,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:53:34,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:53:34,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:53:34,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:53:33" (1/2) ... [2021-08-21 18:53:34,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1d3711 and model type add-sub09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:53:34, skipping insertion in model container [2021-08-21 18:53:34,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:53:34" (2/2) ... [2021-08-21 18:53:34,222 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub09.bpl [2021-08-21 18:53:34,226 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:53:34,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:53:34,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:53:34,226 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:53:34,270 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,271 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,271 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,271 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,271 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,272 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,272 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,272 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,272 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,272 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,273 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,273 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,273 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,273 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,274 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,274 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,274 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,274 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,274 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,275 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,275 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,275 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,275 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,276 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,276 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,276 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,276 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,276 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,277 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,277 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,277 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,277 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,277 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,278 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,278 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,278 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,278 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,279 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,279 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,279 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,279 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,279 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,280 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,280 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,280 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,280 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,281 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,281 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,281 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork8_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,281 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork8_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,282 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork8_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,282 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork8_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,282 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork8_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,282 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork8_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,285 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,288 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,290 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,292 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,294 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,297 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,300 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,304 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,307 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork8_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:53:34,344 INFO L148 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-08-21 18:53:34,386 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:53:34,391 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:53:34,391 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-08-21 18:53:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 436908 states, 300375 states have (on average 1.8424036620890554) internal successors, (553412), 436907 states have internal predecessors, (553412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:03,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:03,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:03,506 INFO L512 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] [2021-08-21 18:54:03,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1405370885, now seen corresponding path program 1 times [2021-08-21 18:54:03,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:03,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881046450] [2021-08-21 18:54:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:03,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:03,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:03,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881046450] [2021-08-21 18:54:03,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881046450] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:03,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:03,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 18:54:03,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309161178] [2021-08-21 18:54:03,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:54:03,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:54:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:54:04,272 INFO L87 Difference]: Start difference. First operand has 436908 states, 300375 states have (on average 1.8424036620890554) internal successors, (553412), 436907 states have internal predecessors, (553412), 0 states have call successors, (0), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:07,163 INFO L93 Difference]: Finished difference Result 476272 states and 607532 transitions. [2021-08-21 18:54:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:54:07,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2021-08-21 18:54:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:07,408 INFO L225 Difference]: With dead ends: 476272 [2021-08-21 18:54:07,409 INFO L226 Difference]: Without dead ends: 40908 [2021-08-21 18:54:07,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:54:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40908 states. [2021-08-21 18:54:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40908 to 39393. [2021-08-21 18:54:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39393 states, 39392 states have (on average 1.5014469943135662) internal successors, (59145), 39392 states have internal predecessors, (59145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39393 states to 39393 states and 59145 transitions. [2021-08-21 18:54:09,547 INFO L78 Accepts]: Start accepts. Automaton has 39393 states and 59145 transitions. Word has length 29 [2021-08-21 18:54:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:09,548 INFO L470 AbstractCegarLoop]: Abstraction has 39393 states and 59145 transitions. [2021-08-21 18:54:09,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 39393 states and 59145 transitions. [2021-08-21 18:54:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:09,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:09,672 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:09,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:54:09,673 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:09,693 INFO L82 PathProgramCache]: Analyzing trace with hash -285494349, now seen corresponding path program 1 times [2021-08-21 18:54:09,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:09,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872694885] [2021-08-21 18:54:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:09,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:09,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:09,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872694885] [2021-08-21 18:54:09,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872694885] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:09,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:09,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:54:09,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018013824] [2021-08-21 18:54:09,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:54:09,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:09,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:54:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:09,852 INFO L87 Difference]: Start difference. First operand 39393 states and 59145 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:10,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:10,382 INFO L93 Difference]: Finished difference Result 41571 states and 63457 transitions. [2021-08-21 18:54:10,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:54:10,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-21 18:54:10,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:10,593 INFO L225 Difference]: With dead ends: 41571 [2021-08-21 18:54:10,593 INFO L226 Difference]: Without dead ends: 41561 [2021-08-21 18:54:10,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41561 states. [2021-08-21 18:54:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41561 to 39410. [2021-08-21 18:54:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39410 states, 39409 states have (on average 1.5029815524372605) internal successors, (59231), 39409 states have internal predecessors, (59231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39410 states to 39410 states and 59231 transitions. [2021-08-21 18:54:12,272 INFO L78 Accepts]: Start accepts. Automaton has 39410 states and 59231 transitions. Word has length 32 [2021-08-21 18:54:12,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:12,273 INFO L470 AbstractCegarLoop]: Abstraction has 39410 states and 59231 transitions. [2021-08-21 18:54:12,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:12,273 INFO L276 IsEmpty]: Start isEmpty. Operand 39410 states and 59231 transitions. [2021-08-21 18:54:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:12,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:12,349 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:12,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:54:12,350 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:12,351 INFO L82 PathProgramCache]: Analyzing trace with hash -685278029, now seen corresponding path program 1 times [2021-08-21 18:54:12,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:12,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291266247] [2021-08-21 18:54:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:12,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:12,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:12,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291266247] [2021-08-21 18:54:12,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291266247] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:12,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:12,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:54:12,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816881809] [2021-08-21 18:54:12,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:54:12,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:12,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:54:12,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:12,473 INFO L87 Difference]: Start difference. First operand 39410 states and 59231 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:12,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:12,743 INFO L93 Difference]: Finished difference Result 41707 states and 63827 transitions. [2021-08-21 18:54:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:54:12,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-21 18:54:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:12,957 INFO L225 Difference]: With dead ends: 41707 [2021-08-21 18:54:12,957 INFO L226 Difference]: Without dead ends: 41697 [2021-08-21 18:54:12,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41697 states. [2021-08-21 18:54:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41697 to 39450. [2021-08-21 18:54:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39450 states, 39449 states have (on average 1.5069330021039824) internal successors, (59447), 39449 states have internal predecessors, (59447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39450 states to 39450 states and 59447 transitions. [2021-08-21 18:54:14,251 INFO L78 Accepts]: Start accepts. Automaton has 39450 states and 59447 transitions. Word has length 32 [2021-08-21 18:54:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:14,251 INFO L470 AbstractCegarLoop]: Abstraction has 39450 states and 59447 transitions. [2021-08-21 18:54:14,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 39450 states and 59447 transitions. [2021-08-21 18:54:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:14,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:14,357 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:14,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:54:14,357 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:14,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:14,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1245172979, now seen corresponding path program 1 times [2021-08-21 18:54:14,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:14,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913410721] [2021-08-21 18:54:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:14,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:14,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:14,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913410721] [2021-08-21 18:54:14,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913410721] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:14,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:14,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:54:14,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861022877] [2021-08-21 18:54:14,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:54:14,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:14,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:54:14,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:14,476 INFO L87 Difference]: Start difference. First operand 39450 states and 59447 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:14,791 INFO L93 Difference]: Finished difference Result 41726 states and 63948 transitions. [2021-08-21 18:54:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:54:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-21 18:54:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:15,203 INFO L225 Difference]: With dead ends: 41726 [2021-08-21 18:54:15,203 INFO L226 Difference]: Without dead ends: 41716 [2021-08-21 18:54:15,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41716 states. [2021-08-21 18:54:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41716 to 39476. [2021-08-21 18:54:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39476 states, 39475 states have (on average 1.5096643445218492) internal successors, (59594), 39475 states have internal predecessors, (59594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39476 states to 39476 states and 59594 transitions. [2021-08-21 18:54:16,487 INFO L78 Accepts]: Start accepts. Automaton has 39476 states and 59594 transitions. Word has length 32 [2021-08-21 18:54:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:16,488 INFO L470 AbstractCegarLoop]: Abstraction has 39476 states and 59594 transitions. [2021-08-21 18:54:16,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 39476 states and 59594 transitions. [2021-08-21 18:54:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:16,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:16,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:16,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:54:16,590 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1543470365, now seen corresponding path program 1 times [2021-08-21 18:54:16,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:16,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830675013] [2021-08-21 18:54:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:16,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:16,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:16,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830675013] [2021-08-21 18:54:16,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830675013] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:16,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:16,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:54:16,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635022324] [2021-08-21 18:54:16,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:54:16,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:16,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:54:16,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:16,672 INFO L87 Difference]: Start difference. First operand 39476 states and 59594 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:16,858 INFO L93 Difference]: Finished difference Result 41559 states and 63797 transitions. [2021-08-21 18:54:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:54:16,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-21 18:54:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:16,979 INFO L225 Difference]: With dead ends: 41559 [2021-08-21 18:54:16,979 INFO L226 Difference]: Without dead ends: 41549 [2021-08-21 18:54:16,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41549 states. [2021-08-21 18:54:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41549 to 39501. [2021-08-21 18:54:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39501 states, 39500 states have (on average 1.5124810126582278) internal successors, (59743), 39500 states have internal predecessors, (59743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39501 states to 39501 states and 59743 transitions. [2021-08-21 18:54:17,786 INFO L78 Accepts]: Start accepts. Automaton has 39501 states and 59743 transitions. Word has length 32 [2021-08-21 18:54:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:17,786 INFO L470 AbstractCegarLoop]: Abstraction has 39501 states and 59743 transitions. [2021-08-21 18:54:17,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 39501 states and 59743 transitions. [2021-08-21 18:54:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:17,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:17,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:17,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 18:54:17,859 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:17,860 INFO L82 PathProgramCache]: Analyzing trace with hash -415511193, now seen corresponding path program 1 times [2021-08-21 18:54:17,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:17,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016981609] [2021-08-21 18:54:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:17,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:17,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:17,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016981609] [2021-08-21 18:54:17,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016981609] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:17,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:17,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:54:17,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348020241] [2021-08-21 18:54:17,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:54:17,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:54:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:17,907 INFO L87 Difference]: Start difference. First operand 39501 states and 59743 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:18,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:18,076 INFO L93 Difference]: Finished difference Result 41764 states and 63866 transitions. [2021-08-21 18:54:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:54:18,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-21 18:54:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:18,172 INFO L225 Difference]: With dead ends: 41764 [2021-08-21 18:54:18,172 INFO L226 Difference]: Without dead ends: 41754 [2021-08-21 18:54:18,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41754 states. [2021-08-21 18:54:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41754 to 39532. [2021-08-21 18:54:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39532 states, 39531 states have (on average 1.5141028559864411) internal successors, (59854), 39531 states have internal predecessors, (59854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39532 states to 39532 states and 59854 transitions. [2021-08-21 18:54:19,017 INFO L78 Accepts]: Start accepts. Automaton has 39532 states and 59854 transitions. Word has length 32 [2021-08-21 18:54:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:19,018 INFO L470 AbstractCegarLoop]: Abstraction has 39532 states and 59854 transitions. [2021-08-21 18:54:19,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 39532 states and 59854 transitions. [2021-08-21 18:54:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:19,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:19,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:19,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 18:54:19,075 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1979630285, now seen corresponding path program 1 times [2021-08-21 18:54:19,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:19,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012662361] [2021-08-21 18:54:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:19,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:19,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:19,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012662361] [2021-08-21 18:54:19,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012662361] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:19,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:19,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:54:19,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287896231] [2021-08-21 18:54:19,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:54:19,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:54:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:19,121 INFO L87 Difference]: Start difference. First operand 39532 states and 59854 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:19,661 INFO L93 Difference]: Finished difference Result 41855 states and 64385 transitions. [2021-08-21 18:54:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:54:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-21 18:54:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:19,741 INFO L225 Difference]: With dead ends: 41855 [2021-08-21 18:54:19,741 INFO L226 Difference]: Without dead ends: 41845 [2021-08-21 18:54:19,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:19,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41845 states. [2021-08-21 18:54:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41845 to 39563. [2021-08-21 18:54:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39563 states, 39562 states have (on average 1.5165057378292301) internal successors, (59996), 39562 states have internal predecessors, (59996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39563 states to 39563 states and 59996 transitions. [2021-08-21 18:54:20,707 INFO L78 Accepts]: Start accepts. Automaton has 39563 states and 59996 transitions. Word has length 32 [2021-08-21 18:54:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:20,707 INFO L470 AbstractCegarLoop]: Abstraction has 39563 states and 59996 transitions. [2021-08-21 18:54:20,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 39563 states and 59996 transitions. [2021-08-21 18:54:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:20,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:20,766 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:20,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 18:54:20,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:20,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:20,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1664040281, now seen corresponding path program 1 times [2021-08-21 18:54:20,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:20,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495867371] [2021-08-21 18:54:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:20,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:20,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:20,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495867371] [2021-08-21 18:54:20,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495867371] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:20,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:20,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:54:20,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150659724] [2021-08-21 18:54:20,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:54:20,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:54:20,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:20,811 INFO L87 Difference]: Start difference. First operand 39563 states and 59996 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:20,969 INFO L93 Difference]: Finished difference Result 41637 states and 63641 transitions. [2021-08-21 18:54:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:54:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-21 18:54:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:21,045 INFO L225 Difference]: With dead ends: 41637 [2021-08-21 18:54:21,045 INFO L226 Difference]: Without dead ends: 41623 [2021-08-21 18:54:21,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41623 states. [2021-08-21 18:54:22,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41623 to 39589. [2021-08-21 18:54:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39589 states, 39588 states have (on average 1.5173537435586542) internal successors, (60069), 39588 states have internal predecessors, (60069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39589 states to 39589 states and 60069 transitions. [2021-08-21 18:54:22,110 INFO L78 Accepts]: Start accepts. Automaton has 39589 states and 60069 transitions. Word has length 32 [2021-08-21 18:54:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:22,110 INFO L470 AbstractCegarLoop]: Abstraction has 39589 states and 60069 transitions. [2021-08-21 18:54:22,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 39589 states and 60069 transitions. [2021-08-21 18:54:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:22,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:22,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:22,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 18:54:22,166 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:22,166 INFO L82 PathProgramCache]: Analyzing trace with hash 651372871, now seen corresponding path program 1 times [2021-08-21 18:54:22,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:22,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006102494] [2021-08-21 18:54:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:22,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:22,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:22,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006102494] [2021-08-21 18:54:22,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006102494] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:22,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:22,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:54:22,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756721293] [2021-08-21 18:54:22,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:54:22,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:54:22,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:22,215 INFO L87 Difference]: Start difference. First operand 39589 states and 60069 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:22,372 INFO L93 Difference]: Finished difference Result 41800 states and 64321 transitions. [2021-08-21 18:54:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:54:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-21 18:54:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:22,710 INFO L225 Difference]: With dead ends: 41800 [2021-08-21 18:54:22,710 INFO L226 Difference]: Without dead ends: 41790 [2021-08-21 18:54:22,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41790 states. [2021-08-21 18:54:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41790 to 39613. [2021-08-21 18:54:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39613 states, 39612 states have (on average 1.5190598808441886) internal successors, (60173), 39612 states have internal predecessors, (60173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39613 states to 39613 states and 60173 transitions. [2021-08-21 18:54:23,625 INFO L78 Accepts]: Start accepts. Automaton has 39613 states and 60173 transitions. Word has length 32 [2021-08-21 18:54:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:23,625 INFO L470 AbstractCegarLoop]: Abstraction has 39613 states and 60173 transitions. [2021-08-21 18:54:23,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 39613 states and 60173 transitions. [2021-08-21 18:54:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:23,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:23,698 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:23,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 18:54:23,698 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:23,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1302493767, now seen corresponding path program 1 times [2021-08-21 18:54:23,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:23,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342041385] [2021-08-21 18:54:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:23,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:23,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:23,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342041385] [2021-08-21 18:54:23,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342041385] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:23,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:23,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:54:23,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116168585] [2021-08-21 18:54:23,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:54:23,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:54:23,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:23,827 INFO L87 Difference]: Start difference. First operand 39613 states and 60173 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:24,102 INFO L93 Difference]: Finished difference Result 41914 states and 64818 transitions. [2021-08-21 18:54:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:54:24,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-08-21 18:54:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:24,210 INFO L225 Difference]: With dead ends: 41914 [2021-08-21 18:54:24,211 INFO L226 Difference]: Without dead ends: 41904 [2021-08-21 18:54:24,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:54:24,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41904 states. [2021-08-21 18:54:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41904 to 39637. [2021-08-21 18:54:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39637 states, 39636 states have (on average 1.5217731355333535) internal successors, (60317), 39636 states have internal predecessors, (60317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39637 states to 39637 states and 60317 transitions. [2021-08-21 18:54:25,051 INFO L78 Accepts]: Start accepts. Automaton has 39637 states and 60317 transitions. Word has length 32 [2021-08-21 18:54:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:25,051 INFO L470 AbstractCegarLoop]: Abstraction has 39637 states and 60317 transitions. [2021-08-21 18:54:25,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 39637 states and 60317 transitions. [2021-08-21 18:54:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:25,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:25,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:25,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 18:54:25,132 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:25,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1875016635, now seen corresponding path program 1 times [2021-08-21 18:54:25,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:25,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046414861] [2021-08-21 18:54:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:25,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:25,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:25,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046414861] [2021-08-21 18:54:25,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046414861] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:25,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:25,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:25,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402905244] [2021-08-21 18:54:25,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:25,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:25,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:25,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:25,261 INFO L87 Difference]: Start difference. First operand 39637 states and 60317 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:25,544 INFO L93 Difference]: Finished difference Result 42611 states and 66262 transitions. [2021-08-21 18:54:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:25,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:25,661 INFO L225 Difference]: With dead ends: 42611 [2021-08-21 18:54:25,662 INFO L226 Difference]: Without dead ends: 42601 [2021-08-21 18:54:25,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:25,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42601 states. [2021-08-21 18:54:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42601 to 39645. [2021-08-21 18:54:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39645 states, 39644 states have (on average 1.5214155988295832) internal successors, (60315), 39644 states have internal predecessors, (60315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39645 states to 39645 states and 60315 transitions. [2021-08-21 18:54:26,389 INFO L78 Accepts]: Start accepts. Automaton has 39645 states and 60315 transitions. Word has length 35 [2021-08-21 18:54:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:26,390 INFO L470 AbstractCegarLoop]: Abstraction has 39645 states and 60315 transitions. [2021-08-21 18:54:26,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 39645 states and 60315 transitions. [2021-08-21 18:54:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:26,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:26,700 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:26,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 18:54:26,701 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 55434373, now seen corresponding path program 1 times [2021-08-21 18:54:26,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:26,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768023205] [2021-08-21 18:54:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:26,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:26,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:26,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768023205] [2021-08-21 18:54:26,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768023205] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:26,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:26,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:26,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859001346] [2021-08-21 18:54:26,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:26,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:26,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:26,804 INFO L87 Difference]: Start difference. First operand 39645 states and 60315 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:26,995 INFO L93 Difference]: Finished difference Result 42626 states and 66353 transitions. [2021-08-21 18:54:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:26,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:27,076 INFO L225 Difference]: With dead ends: 42626 [2021-08-21 18:54:27,076 INFO L226 Difference]: Without dead ends: 42616 [2021-08-21 18:54:27,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42616 states. [2021-08-21 18:54:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42616 to 39691. [2021-08-21 18:54:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39691 states, 39690 states have (on average 1.526329050138574) internal successors, (60580), 39690 states have internal predecessors, (60580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39691 states to 39691 states and 60580 transitions. [2021-08-21 18:54:27,764 INFO L78 Accepts]: Start accepts. Automaton has 39691 states and 60580 transitions. Word has length 35 [2021-08-21 18:54:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:27,765 INFO L470 AbstractCegarLoop]: Abstraction has 39691 states and 60580 transitions. [2021-08-21 18:54:27,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 39691 states and 60580 transitions. [2021-08-21 18:54:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:27,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:27,821 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:27,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 18:54:27,821 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1561758325, now seen corresponding path program 1 times [2021-08-21 18:54:27,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:27,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61319436] [2021-08-21 18:54:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:27,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:27,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:27,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61319436] [2021-08-21 18:54:27,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61319436] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:27,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:27,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:27,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588048689] [2021-08-21 18:54:27,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:27,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:27,883 INFO L87 Difference]: Start difference. First operand 39691 states and 60580 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:28,122 INFO L93 Difference]: Finished difference Result 42461 states and 66178 transitions. [2021-08-21 18:54:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:28,203 INFO L225 Difference]: With dead ends: 42461 [2021-08-21 18:54:28,203 INFO L226 Difference]: Without dead ends: 42451 [2021-08-21 18:54:28,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42451 states. [2021-08-21 18:54:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42451 to 39725. [2021-08-21 18:54:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39725 states, 39724 states have (on average 1.5290504480918337) internal successors, (60740), 39724 states have internal predecessors, (60740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39725 states to 39725 states and 60740 transitions. [2021-08-21 18:54:28,881 INFO L78 Accepts]: Start accepts. Automaton has 39725 states and 60740 transitions. Word has length 35 [2021-08-21 18:54:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:28,881 INFO L470 AbstractCegarLoop]: Abstraction has 39725 states and 60740 transitions. [2021-08-21 18:54:28,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand 39725 states and 60740 transitions. [2021-08-21 18:54:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:28,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:28,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:28,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 18:54:28,939 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:28,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1605249799, now seen corresponding path program 1 times [2021-08-21 18:54:28,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:28,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506384828] [2021-08-21 18:54:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:28,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:28,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:28,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506384828] [2021-08-21 18:54:28,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506384828] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:28,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:28,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:28,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403227289] [2021-08-21 18:54:28,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:28,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:28,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:28,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:28,998 INFO L87 Difference]: Start difference. First operand 39725 states and 60740 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:29,343 INFO L93 Difference]: Finished difference Result 42659 states and 66245 transitions. [2021-08-21 18:54:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:29,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:29,417 INFO L225 Difference]: With dead ends: 42659 [2021-08-21 18:54:29,417 INFO L226 Difference]: Without dead ends: 42649 [2021-08-21 18:54:29,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42649 states. [2021-08-21 18:54:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42649 to 39742. [2021-08-21 18:54:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39742 states, 39741 states have (on average 1.5303087491507512) internal successors, (60816), 39741 states have internal predecessors, (60816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39742 states to 39742 states and 60816 transitions. [2021-08-21 18:54:30,121 INFO L78 Accepts]: Start accepts. Automaton has 39742 states and 60816 transitions. Word has length 35 [2021-08-21 18:54:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:30,121 INFO L470 AbstractCegarLoop]: Abstraction has 39742 states and 60816 transitions. [2021-08-21 18:54:30,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 39742 states and 60816 transitions. [2021-08-21 18:54:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:30,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:30,182 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:30,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 18:54:30,183 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1125598405, now seen corresponding path program 1 times [2021-08-21 18:54:30,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:30,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045853800] [2021-08-21 18:54:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:30,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:30,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:30,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045853800] [2021-08-21 18:54:30,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045853800] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:30,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:30,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:30,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511807845] [2021-08-21 18:54:30,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:30,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:30,237 INFO L87 Difference]: Start difference. First operand 39742 states and 60816 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:30,440 INFO L93 Difference]: Finished difference Result 42741 states and 66745 transitions. [2021-08-21 18:54:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:30,520 INFO L225 Difference]: With dead ends: 42741 [2021-08-21 18:54:30,520 INFO L226 Difference]: Without dead ends: 42731 [2021-08-21 18:54:30,520 INFO L781 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 [2021-08-21 18:54:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42731 states. [2021-08-21 18:54:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42731 to 39767. [2021-08-21 18:54:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39767 states, 39766 states have (on average 1.5321380073429562) internal successors, (60927), 39766 states have internal predecessors, (60927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39767 states to 39767 states and 60927 transitions. [2021-08-21 18:54:31,231 INFO L78 Accepts]: Start accepts. Automaton has 39767 states and 60927 transitions. Word has length 35 [2021-08-21 18:54:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:31,231 INFO L470 AbstractCegarLoop]: Abstraction has 39767 states and 60927 transitions. [2021-08-21 18:54:31,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 39767 states and 60927 transitions. [2021-08-21 18:54:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:31,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:31,289 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:31,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 18:54:31,289 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:31,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1441188409, now seen corresponding path program 1 times [2021-08-21 18:54:31,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:31,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716571754] [2021-08-21 18:54:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:31,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:31,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:31,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716571754] [2021-08-21 18:54:31,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716571754] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:31,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:31,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:31,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187085836] [2021-08-21 18:54:31,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:31,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:31,358 INFO L87 Difference]: Start difference. First operand 39767 states and 60927 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:31,727 INFO L93 Difference]: Finished difference Result 42488 states and 65872 transitions. [2021-08-21 18:54:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:31,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:31,828 INFO L225 Difference]: With dead ends: 42488 [2021-08-21 18:54:31,828 INFO L226 Difference]: Without dead ends: 42474 [2021-08-21 18:54:31,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:31,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42474 states. [2021-08-21 18:54:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42474 to 39776. [2021-08-21 18:54:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39776 states, 39775 states have (on average 1.5327969830295411) internal successors, (60967), 39775 states have internal predecessors, (60967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39776 states to 39776 states and 60967 transitions. [2021-08-21 18:54:32,538 INFO L78 Accepts]: Start accepts. Automaton has 39776 states and 60967 transitions. Word has length 35 [2021-08-21 18:54:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:32,538 INFO L470 AbstractCegarLoop]: Abstraction has 39776 states and 60967 transitions. [2021-08-21 18:54:32,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 39776 states and 60967 transitions. [2021-08-21 18:54:32,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:32,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:32,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:32,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 18:54:32,601 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:32,603 INFO L82 PathProgramCache]: Analyzing trace with hash -538365735, now seen corresponding path program 1 times [2021-08-21 18:54:32,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:32,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883763411] [2021-08-21 18:54:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:32,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:32,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:32,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883763411] [2021-08-21 18:54:32,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883763411] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:32,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:32,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:32,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112869898] [2021-08-21 18:54:32,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:32,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:32,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:32,693 INFO L87 Difference]: Start difference. First operand 39776 states and 60967 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:32,880 INFO L93 Difference]: Finished difference Result 42637 states and 66536 transitions. [2021-08-21 18:54:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:32,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:32,958 INFO L225 Difference]: With dead ends: 42637 [2021-08-21 18:54:32,958 INFO L226 Difference]: Without dead ends: 42627 [2021-08-21 18:54:32,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:33,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42627 states. [2021-08-21 18:54:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42627 to 39784. [2021-08-21 18:54:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39784 states, 39783 states have (on average 1.5334942060679184) internal successors, (61007), 39783 states have internal predecessors, (61007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39784 states to 39784 states and 61007 transitions. [2021-08-21 18:54:33,615 INFO L78 Accepts]: Start accepts. Automaton has 39784 states and 61007 transitions. Word has length 35 [2021-08-21 18:54:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:33,615 INFO L470 AbstractCegarLoop]: Abstraction has 39784 states and 61007 transitions. [2021-08-21 18:54:33,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 39784 states and 61007 transitions. [2021-08-21 18:54:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:33,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:33,672 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:33,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-21 18:54:33,672 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash 112755161, now seen corresponding path program 1 times [2021-08-21 18:54:33,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:33,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329013623] [2021-08-21 18:54:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:33,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:33,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:33,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329013623] [2021-08-21 18:54:33,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329013623] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:33,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:33,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:33,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793247149] [2021-08-21 18:54:33,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:33,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:33,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:33,727 INFO L87 Difference]: Start difference. First operand 39784 states and 61007 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:33,928 INFO L93 Difference]: Finished difference Result 42756 states and 67032 transitions. [2021-08-21 18:54:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:33,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:34,202 INFO L225 Difference]: With dead ends: 42756 [2021-08-21 18:54:34,202 INFO L226 Difference]: Without dead ends: 42746 [2021-08-21 18:54:34,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42746 states. [2021-08-21 18:54:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42746 to 39801. [2021-08-21 18:54:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39801 states, 39800 states have (on average 1.534824120603015) internal successors, (61086), 39800 states have internal predecessors, (61086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39801 states to 39801 states and 61086 transitions. [2021-08-21 18:54:34,928 INFO L78 Accepts]: Start accepts. Automaton has 39801 states and 61086 transitions. Word has length 35 [2021-08-21 18:54:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:34,928 INFO L470 AbstractCegarLoop]: Abstraction has 39801 states and 61086 transitions. [2021-08-21 18:54:34,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 39801 states and 61086 transitions. [2021-08-21 18:54:34,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:34,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:34,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:34,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 18:54:34,978 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:34,978 INFO L82 PathProgramCache]: Analyzing trace with hash 44135301, now seen corresponding path program 1 times [2021-08-21 18:54:34,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:34,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898853661] [2021-08-21 18:54:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:34,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:35,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:35,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898853661] [2021-08-21 18:54:35,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898853661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:35,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:35,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:35,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028272135] [2021-08-21 18:54:35,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:35,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:35,037 INFO L87 Difference]: Start difference. First operand 39801 states and 61086 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:35,220 INFO L93 Difference]: Finished difference Result 42977 states and 67739 transitions. [2021-08-21 18:54:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:35,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:35,296 INFO L225 Difference]: With dead ends: 42977 [2021-08-21 18:54:35,297 INFO L226 Difference]: Without dead ends: 42967 [2021-08-21 18:54:35,297 INFO L781 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 [2021-08-21 18:54:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42967 states. [2021-08-21 18:54:35,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42967 to 39901. [2021-08-21 18:54:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39901 states, 39900 states have (on average 1.5439849624060151) internal successors, (61605), 39900 states have internal predecessors, (61605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39901 states to 39901 states and 61605 transitions. [2021-08-21 18:54:35,933 INFO L78 Accepts]: Start accepts. Automaton has 39901 states and 61605 transitions. Word has length 35 [2021-08-21 18:54:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:35,933 INFO L470 AbstractCegarLoop]: Abstraction has 39901 states and 61605 transitions. [2021-08-21 18:54:35,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 39901 states and 61605 transitions. [2021-08-21 18:54:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:35,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:35,992 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:35,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 18:54:35,992 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:35,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1550459253, now seen corresponding path program 1 times [2021-08-21 18:54:35,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:35,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677632136] [2021-08-21 18:54:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:35,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:36,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:36,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677632136] [2021-08-21 18:54:36,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677632136] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:36,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:36,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:36,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890729861] [2021-08-21 18:54:36,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:36,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:36,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:36,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:36,047 INFO L87 Difference]: Start difference. First operand 39901 states and 61605 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:36,238 INFO L93 Difference]: Finished difference Result 42863 states and 67822 transitions. [2021-08-21 18:54:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:36,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:36,312 INFO L225 Difference]: With dead ends: 42863 [2021-08-21 18:54:36,312 INFO L226 Difference]: Without dead ends: 42853 [2021-08-21 18:54:36,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42853 states. [2021-08-21 18:54:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42853 to 39978. [2021-08-21 18:54:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39978 states, 39977 states have (on average 1.5507917052305076) internal successors, (61996), 39977 states have internal predecessors, (61996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39978 states to 39978 states and 61996 transitions. [2021-08-21 18:54:37,010 INFO L78 Accepts]: Start accepts. Automaton has 39978 states and 61996 transitions. Word has length 35 [2021-08-21 18:54:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:37,011 INFO L470 AbstractCegarLoop]: Abstraction has 39978 states and 61996 transitions. [2021-08-21 18:54:37,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 39978 states and 61996 transitions. [2021-08-21 18:54:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:37,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:37,257 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:37,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-21 18:54:37,257 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:37,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1616548871, now seen corresponding path program 1 times [2021-08-21 18:54:37,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:37,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217459178] [2021-08-21 18:54:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:37,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:37,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:37,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217459178] [2021-08-21 18:54:37,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217459178] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:37,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:37,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:37,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825437044] [2021-08-21 18:54:37,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:37,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:37,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:37,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:37,331 INFO L87 Difference]: Start difference. First operand 39978 states and 61996 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:37,543 INFO L93 Difference]: Finished difference Result 43115 states and 68098 transitions. [2021-08-21 18:54:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:37,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:37,617 INFO L225 Difference]: With dead ends: 43115 [2021-08-21 18:54:37,617 INFO L226 Difference]: Without dead ends: 43105 [2021-08-21 18:54:37,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43105 states. [2021-08-21 18:54:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43105 to 40039. [2021-08-21 18:54:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40039 states, 40038 states have (on average 1.5546730605924373) internal successors, (62246), 40038 states have internal predecessors, (62246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40039 states to 40039 states and 62246 transitions. [2021-08-21 18:54:38,293 INFO L78 Accepts]: Start accepts. Automaton has 40039 states and 62246 transitions. Word has length 35 [2021-08-21 18:54:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:38,293 INFO L470 AbstractCegarLoop]: Abstraction has 40039 states and 62246 transitions. [2021-08-21 18:54:38,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 40039 states and 62246 transitions. [2021-08-21 18:54:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:38,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:38,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:38,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-21 18:54:38,350 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1114299333, now seen corresponding path program 1 times [2021-08-21 18:54:38,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:38,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631908315] [2021-08-21 18:54:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:38,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:38,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:38,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631908315] [2021-08-21 18:54:38,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631908315] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:38,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:38,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:38,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354899512] [2021-08-21 18:54:38,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:38,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:38,402 INFO L87 Difference]: Start difference. First operand 40039 states and 62246 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:38,583 INFO L93 Difference]: Finished difference Result 43247 states and 68786 transitions. [2021-08-21 18:54:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:38,658 INFO L225 Difference]: With dead ends: 43247 [2021-08-21 18:54:38,659 INFO L226 Difference]: Without dead ends: 43237 [2021-08-21 18:54:38,659 INFO L781 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 [2021-08-21 18:54:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43237 states. [2021-08-21 18:54:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43237 to 40114. [2021-08-21 18:54:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40114 states, 40113 states have (on average 1.559644005683943) internal successors, (62562), 40113 states have internal predecessors, (62562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40114 states to 40114 states and 62562 transitions. [2021-08-21 18:54:39,331 INFO L78 Accepts]: Start accepts. Automaton has 40114 states and 62562 transitions. Word has length 35 [2021-08-21 18:54:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:39,331 INFO L470 AbstractCegarLoop]: Abstraction has 40114 states and 62562 transitions. [2021-08-21 18:54:39,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:39,331 INFO L276 IsEmpty]: Start isEmpty. Operand 40114 states and 62562 transitions. [2021-08-21 18:54:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:39,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:39,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:39,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 18:54:39,388 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:39,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1429889337, now seen corresponding path program 1 times [2021-08-21 18:54:39,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:39,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005617479] [2021-08-21 18:54:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:39,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:39,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:39,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005617479] [2021-08-21 18:54:39,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005617479] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:39,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:39,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:39,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026895078] [2021-08-21 18:54:39,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:39,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:39,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:39,448 INFO L87 Difference]: Start difference. First operand 40114 states and 62562 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:39,810 INFO L93 Difference]: Finished difference Result 43034 states and 68046 transitions. [2021-08-21 18:54:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:39,881 INFO L225 Difference]: With dead ends: 43034 [2021-08-21 18:54:39,882 INFO L226 Difference]: Without dead ends: 43020 [2021-08-21 18:54:39,882 INFO L781 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 [2021-08-21 18:54:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43020 states. [2021-08-21 18:54:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43020 to 40149. [2021-08-21 18:54:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40149 states, 40148 states have (on average 1.561397828036266) internal successors, (62687), 40148 states have internal predecessors, (62687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40149 states to 40149 states and 62687 transitions. [2021-08-21 18:54:40,564 INFO L78 Accepts]: Start accepts. Automaton has 40149 states and 62687 transitions. Word has length 35 [2021-08-21 18:54:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:40,564 INFO L470 AbstractCegarLoop]: Abstraction has 40149 states and 62687 transitions. [2021-08-21 18:54:40,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 40149 states and 62687 transitions. [2021-08-21 18:54:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:40,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:40,617 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:40,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-21 18:54:40,617 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -549664807, now seen corresponding path program 1 times [2021-08-21 18:54:40,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:40,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910525008] [2021-08-21 18:54:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:40,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:40,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:40,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910525008] [2021-08-21 18:54:40,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910525008] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:40,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:40,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:40,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739983747] [2021-08-21 18:54:40,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:40,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:40,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:40,667 INFO L87 Difference]: Start difference. First operand 40149 states and 62687 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:40,831 INFO L93 Difference]: Finished difference Result 43216 states and 68848 transitions. [2021-08-21 18:54:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:40,907 INFO L225 Difference]: With dead ends: 43216 [2021-08-21 18:54:40,907 INFO L226 Difference]: Without dead ends: 43206 [2021-08-21 18:54:40,907 INFO L781 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 [2021-08-21 18:54:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43206 states. [2021-08-21 18:54:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43206 to 40189. [2021-08-21 18:54:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40189 states, 40188 states have (on average 1.5642978003384094) internal successors, (62866), 40188 states have internal predecessors, (62866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40189 states to 40189 states and 62866 transitions. [2021-08-21 18:54:41,620 INFO L78 Accepts]: Start accepts. Automaton has 40189 states and 62866 transitions. Word has length 35 [2021-08-21 18:54:41,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:41,620 INFO L470 AbstractCegarLoop]: Abstraction has 40189 states and 62866 transitions. [2021-08-21 18:54:41,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:41,620 INFO L276 IsEmpty]: Start isEmpty. Operand 40189 states and 62866 transitions. [2021-08-21 18:54:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:41,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:41,679 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:41,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-21 18:54:41,680 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash 101456089, now seen corresponding path program 1 times [2021-08-21 18:54:41,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:41,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742654938] [2021-08-21 18:54:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:41,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:41,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:41,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742654938] [2021-08-21 18:54:41,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742654938] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:41,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:41,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:41,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074163788] [2021-08-21 18:54:41,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:41,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:41,741 INFO L87 Difference]: Start difference. First operand 40189 states and 62866 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:42,234 INFO L93 Difference]: Finished difference Result 43384 states and 69567 transitions. [2021-08-21 18:54:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:42,318 INFO L225 Difference]: With dead ends: 43384 [2021-08-21 18:54:42,318 INFO L226 Difference]: Without dead ends: 43374 [2021-08-21 18:54:42,318 INFO L781 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 [2021-08-21 18:54:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43374 states. [2021-08-21 18:54:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43374 to 40265. [2021-08-21 18:54:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40265 states, 40264 states have (on average 1.5710311941188158) internal successors, (63256), 40264 states have internal predecessors, (63256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40265 states to 40265 states and 63256 transitions. [2021-08-21 18:54:43,065 INFO L78 Accepts]: Start accepts. Automaton has 40265 states and 63256 transitions. Word has length 35 [2021-08-21 18:54:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:43,065 INFO L470 AbstractCegarLoop]: Abstraction has 40265 states and 63256 transitions. [2021-08-21 18:54:43,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 40265 states and 63256 transitions. [2021-08-21 18:54:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:43,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:43,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:43,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-21 18:54:43,128 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:43,128 INFO L82 PathProgramCache]: Analyzing trace with hash -720817335, now seen corresponding path program 2 times [2021-08-21 18:54:43,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:43,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671532156] [2021-08-21 18:54:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:43,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:43,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:43,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671532156] [2021-08-21 18:54:43,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671532156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:43,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341045325] [2021-08-21 18:54:43,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:43,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:43,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:43,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:43,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:54:43,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:43,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:54:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:43,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341045325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:43,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:43,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:54:43,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211576732] [2021-08-21 18:54:43,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:43,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:43,674 INFO L87 Difference]: Start difference. First operand 40265 states and 63256 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:43,881 INFO L93 Difference]: Finished difference Result 43099 states and 69100 transitions. [2021-08-21 18:54:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:43,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:43,958 INFO L225 Difference]: With dead ends: 43099 [2021-08-21 18:54:43,958 INFO L226 Difference]: Without dead ends: 43089 [2021-08-21 18:54:43,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43089 states. [2021-08-21 18:54:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43089 to 40305. [2021-08-21 18:54:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40305 states, 40304 states have (on average 1.5740869392616117) internal successors, (63442), 40304 states have internal predecessors, (63442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40305 states to 40305 states and 63442 transitions. [2021-08-21 18:54:44,837 INFO L78 Accepts]: Start accepts. Automaton has 40305 states and 63442 transitions. Word has length 35 [2021-08-21 18:54:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:44,838 INFO L470 AbstractCegarLoop]: Abstraction has 40305 states and 63442 transitions. [2021-08-21 18:54:44,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 40305 states and 63442 transitions. [2021-08-21 18:54:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:45,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:45,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:45,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 18:54:45,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:54:45,341 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1261870405, now seen corresponding path program 2 times [2021-08-21 18:54:45,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:45,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812241773] [2021-08-21 18:54:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:45,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:45,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:45,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812241773] [2021-08-21 18:54:45,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812241773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:45,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245762510] [2021-08-21 18:54:45,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:45,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:45,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:45,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:45,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:54:45,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:45,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:45,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:54:45,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:45,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245762510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:45,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:45,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:54:45,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707998504] [2021-08-21 18:54:45,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:45,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:45,791 INFO L87 Difference]: Start difference. First operand 40305 states and 63442 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:46,024 INFO L93 Difference]: Finished difference Result 43124 states and 69303 transitions. [2021-08-21 18:54:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:46,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:46,120 INFO L225 Difference]: With dead ends: 43124 [2021-08-21 18:54:46,120 INFO L226 Difference]: Without dead ends: 43114 [2021-08-21 18:54:46,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43114 states. [2021-08-21 18:54:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43114 to 40340. [2021-08-21 18:54:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40340 states, 40339 states have (on average 1.5773816901757605) internal successors, (63630), 40339 states have internal predecessors, (63630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40340 states to 40340 states and 63630 transitions. [2021-08-21 18:54:46,791 INFO L78 Accepts]: Start accepts. Automaton has 40340 states and 63630 transitions. Word has length 35 [2021-08-21 18:54:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:46,792 INFO L470 AbstractCegarLoop]: Abstraction has 40340 states and 63630 transitions. [2021-08-21 18:54:46,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 40340 states and 63630 transitions. [2021-08-21 18:54:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:46,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:46,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:46,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:47,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:54:47,052 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2004345141, now seen corresponding path program 1 times [2021-08-21 18:54:47,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:47,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205606816] [2021-08-21 18:54:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:47,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:47,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:47,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205606816] [2021-08-21 18:54:47,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205606816] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:47,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:47,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:47,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553433223] [2021-08-21 18:54:47,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:47,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:47,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:47,104 INFO L87 Difference]: Start difference. First operand 40340 states and 63630 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:47,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:47,462 INFO L93 Difference]: Finished difference Result 43301 states and 69790 transitions. [2021-08-21 18:54:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:47,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:47,532 INFO L225 Difference]: With dead ends: 43301 [2021-08-21 18:54:47,533 INFO L226 Difference]: Without dead ends: 43291 [2021-08-21 18:54:47,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43291 states. [2021-08-21 18:54:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43291 to 40373. [2021-08-21 18:54:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40373 states, 40372 states have (on average 1.5806499554146438) internal successors, (63814), 40372 states have internal predecessors, (63814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40373 states to 40373 states and 63814 transitions. [2021-08-21 18:54:48,264 INFO L78 Accepts]: Start accepts. Automaton has 40373 states and 63814 transitions. Word has length 35 [2021-08-21 18:54:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:48,264 INFO L470 AbstractCegarLoop]: Abstraction has 40373 states and 63814 transitions. [2021-08-21 18:54:48,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 40373 states and 63814 transitions. [2021-08-21 18:54:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:48,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:48,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:48,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-21 18:54:48,325 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:48,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:48,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1162662983, now seen corresponding path program 1 times [2021-08-21 18:54:48,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:48,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732121151] [2021-08-21 18:54:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:48,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:48,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:48,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732121151] [2021-08-21 18:54:48,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732121151] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:48,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:48,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:48,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073673299] [2021-08-21 18:54:48,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:48,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:48,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:48,389 INFO L87 Difference]: Start difference. First operand 40373 states and 63814 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:48,574 INFO L93 Difference]: Finished difference Result 43532 states and 69990 transitions. [2021-08-21 18:54:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:48,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:48,686 INFO L225 Difference]: With dead ends: 43532 [2021-08-21 18:54:48,687 INFO L226 Difference]: Without dead ends: 43522 [2021-08-21 18:54:48,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43522 states. [2021-08-21 18:54:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43522 to 40437. [2021-08-21 18:54:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40437 states, 40436 states have (on average 1.584281333465229) internal successors, (64062), 40436 states have internal predecessors, (64062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40437 states to 40437 states and 64062 transitions. [2021-08-21 18:54:49,408 INFO L78 Accepts]: Start accepts. Automaton has 40437 states and 64062 transitions. Word has length 35 [2021-08-21 18:54:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:49,408 INFO L470 AbstractCegarLoop]: Abstraction has 40437 states and 64062 transitions. [2021-08-21 18:54:49,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 40437 states and 64062 transitions. [2021-08-21 18:54:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:49,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:49,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:49,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-21 18:54:49,466 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:49,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:49,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1568185221, now seen corresponding path program 1 times [2021-08-21 18:54:49,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:49,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783517697] [2021-08-21 18:54:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:49,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:49,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:49,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783517697] [2021-08-21 18:54:49,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783517697] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:49,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:49,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:49,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618708229] [2021-08-21 18:54:49,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:49,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:49,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:49,515 INFO L87 Difference]: Start difference. First operand 40437 states and 64062 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:49,741 INFO L93 Difference]: Finished difference Result 43662 states and 70646 transitions. [2021-08-21 18:54:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:50,045 INFO L225 Difference]: With dead ends: 43662 [2021-08-21 18:54:50,045 INFO L226 Difference]: Without dead ends: 43652 [2021-08-21 18:54:50,046 INFO L781 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 [2021-08-21 18:54:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43652 states. [2021-08-21 18:54:50,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43652 to 40503. [2021-08-21 18:54:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40503 states, 40502 states have (on average 1.5888104291146117) internal successors, (64350), 40502 states have internal predecessors, (64350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40503 states to 40503 states and 64350 transitions. [2021-08-21 18:54:50,760 INFO L78 Accepts]: Start accepts. Automaton has 40503 states and 64350 transitions. Word has length 35 [2021-08-21 18:54:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:50,761 INFO L470 AbstractCegarLoop]: Abstraction has 40503 states and 64350 transitions. [2021-08-21 18:54:50,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 40503 states and 64350 transitions. [2021-08-21 18:54:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:50,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:50,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:50,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-21 18:54:50,818 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1883775225, now seen corresponding path program 1 times [2021-08-21 18:54:50,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:50,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023195659] [2021-08-21 18:54:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:50,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:50,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:50,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023195659] [2021-08-21 18:54:50,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023195659] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:50,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:50,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:50,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155670411] [2021-08-21 18:54:50,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:50,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:50,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:50,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:50,869 INFO L87 Difference]: Start difference. First operand 40503 states and 64350 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:51,055 INFO L93 Difference]: Finished difference Result 43446 states and 69912 transitions. [2021-08-21 18:54:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:51,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:51,136 INFO L225 Difference]: With dead ends: 43446 [2021-08-21 18:54:51,136 INFO L226 Difference]: Without dead ends: 43432 [2021-08-21 18:54:51,136 INFO L781 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 [2021-08-21 18:54:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43432 states. [2021-08-21 18:54:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43432 to 40545. [2021-08-21 18:54:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40545 states, 40544 states have (on average 1.590444948697711) internal successors, (64483), 40544 states have internal predecessors, (64483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40545 states to 40545 states and 64483 transitions. [2021-08-21 18:54:51,809 INFO L78 Accepts]: Start accepts. Automaton has 40545 states and 64483 transitions. Word has length 35 [2021-08-21 18:54:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:51,809 INFO L470 AbstractCegarLoop]: Abstraction has 40545 states and 64483 transitions. [2021-08-21 18:54:51,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 40545 states and 64483 transitions. [2021-08-21 18:54:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:51,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:51,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:51,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-21 18:54:51,867 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:51,867 INFO L82 PathProgramCache]: Analyzing trace with hash -95778919, now seen corresponding path program 1 times [2021-08-21 18:54:51,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:51,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843048144] [2021-08-21 18:54:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:51,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:51,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:51,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843048144] [2021-08-21 18:54:51,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843048144] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:51,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:51,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:51,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633182242] [2021-08-21 18:54:51,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:51,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:51,918 INFO L87 Difference]: Start difference. First operand 40545 states and 64483 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:52,097 INFO L93 Difference]: Finished difference Result 43638 states and 70718 transitions. [2021-08-21 18:54:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:52,361 INFO L225 Difference]: With dead ends: 43638 [2021-08-21 18:54:52,361 INFO L226 Difference]: Without dead ends: 43628 [2021-08-21 18:54:52,362 INFO L781 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 [2021-08-21 18:54:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43628 states. [2021-08-21 18:54:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43628 to 40590. [2021-08-21 18:54:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40590 states, 40589 states have (on average 1.5932888220946562) internal successors, (64670), 40589 states have internal predecessors, (64670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40590 states to 40590 states and 64670 transitions. [2021-08-21 18:54:53,091 INFO L78 Accepts]: Start accepts. Automaton has 40590 states and 64670 transitions. Word has length 35 [2021-08-21 18:54:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:53,092 INFO L470 AbstractCegarLoop]: Abstraction has 40590 states and 64670 transitions. [2021-08-21 18:54:53,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 40590 states and 64670 transitions. [2021-08-21 18:54:53,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:53,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:53,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:53,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-21 18:54:53,145 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:53,146 INFO L82 PathProgramCache]: Analyzing trace with hash 555341977, now seen corresponding path program 1 times [2021-08-21 18:54:53,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:53,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217906396] [2021-08-21 18:54:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:53,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:53,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:53,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217906396] [2021-08-21 18:54:53,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217906396] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:53,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:53,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:54:53,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489623847] [2021-08-21 18:54:53,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:53,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:53,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:53,205 INFO L87 Difference]: Start difference. First operand 40590 states and 64670 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:53,405 INFO L93 Difference]: Finished difference Result 43790 states and 71335 transitions. [2021-08-21 18:54:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:53,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:53,486 INFO L225 Difference]: With dead ends: 43790 [2021-08-21 18:54:53,486 INFO L226 Difference]: Without dead ends: 43780 [2021-08-21 18:54:53,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43780 states. [2021-08-21 18:54:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43780 to 40635. [2021-08-21 18:54:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40635 states, 40634 states have (on average 1.5974553329723877) internal successors, (64911), 40634 states have internal predecessors, (64911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40635 states to 40635 states and 64911 transitions. [2021-08-21 18:54:54,154 INFO L78 Accepts]: Start accepts. Automaton has 40635 states and 64911 transitions. Word has length 35 [2021-08-21 18:54:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:54,154 INFO L470 AbstractCegarLoop]: Abstraction has 40635 states and 64911 transitions. [2021-08-21 18:54:54,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 40635 states and 64911 transitions. [2021-08-21 18:54:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:54,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:54,213 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:54,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-21 18:54:54,213 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:54,213 INFO L82 PathProgramCache]: Analyzing trace with hash 615653061, now seen corresponding path program 2 times [2021-08-21 18:54:54,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:54,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97743607] [2021-08-21 18:54:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:54,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:54,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:54,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97743607] [2021-08-21 18:54:54,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97743607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:54,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110554900] [2021-08-21 18:54:54,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:54,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:54,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:54,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:54:54,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:54,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:54:54,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110554900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:54,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:54,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:54:54,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229463299] [2021-08-21 18:54:54,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:54,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:54,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:54,651 INFO L87 Difference]: Start difference. First operand 40635 states and 64911 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:55,056 INFO L93 Difference]: Finished difference Result 43486 states and 70800 transitions. [2021-08-21 18:54:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:55,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:55,135 INFO L225 Difference]: With dead ends: 43486 [2021-08-21 18:54:55,135 INFO L226 Difference]: Without dead ends: 43476 [2021-08-21 18:54:55,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:55,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43476 states. [2021-08-21 18:54:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43476 to 40675. [2021-08-21 18:54:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40675 states, 40674 states have (on average 1.600408123125338) internal successors, (65095), 40674 states have internal predecessors, (65095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40675 states to 40675 states and 65095 transitions. [2021-08-21 18:54:55,853 INFO L78 Accepts]: Start accepts. Automaton has 40675 states and 65095 transitions. Word has length 35 [2021-08-21 18:54:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:55,853 INFO L470 AbstractCegarLoop]: Abstraction has 40675 states and 65095 transitions. [2021-08-21 18:54:55,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 40675 states and 65095 transitions. [2021-08-21 18:54:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:55,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:55,914 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:55,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:56,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:56,114 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:56,115 INFO L82 PathProgramCache]: Analyzing trace with hash -820145987, now seen corresponding path program 2 times [2021-08-21 18:54:56,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:56,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233264154] [2021-08-21 18:54:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:56,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:56,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:56,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233264154] [2021-08-21 18:54:56,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233264154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:56,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027321470] [2021-08-21 18:54:56,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:56,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:56,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:56,171 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:56,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:54:56,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:56,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:54:56,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:56,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027321470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:56,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:56,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:54:56,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353729994] [2021-08-21 18:54:56,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:56,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:56,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:56,533 INFO L87 Difference]: Start difference. First operand 40675 states and 65095 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:56,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:56,766 INFO L93 Difference]: Finished difference Result 43207 states and 70415 transitions. [2021-08-21 18:54:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:57,041 INFO L225 Difference]: With dead ends: 43207 [2021-08-21 18:54:57,041 INFO L226 Difference]: Without dead ends: 43197 [2021-08-21 18:54:57,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43197 states. [2021-08-21 18:54:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43197 to 40711. [2021-08-21 18:54:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40711 states, 40710 states have (on average 1.6035617784328176) internal successors, (65281), 40710 states have internal predecessors, (65281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40711 states to 40711 states and 65281 transitions. [2021-08-21 18:54:57,796 INFO L78 Accepts]: Start accepts. Automaton has 40711 states and 65281 transitions. Word has length 35 [2021-08-21 18:54:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:57,797 INFO L470 AbstractCegarLoop]: Abstraction has 40711 states and 65281 transitions. [2021-08-21 18:54:57,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 40711 states and 65281 transitions. [2021-08-21 18:54:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:57,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:57,852 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:57,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-21 18:54:58,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:58,056 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:54:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:58,057 INFO L82 PathProgramCache]: Analyzing trace with hash -682996551, now seen corresponding path program 2 times [2021-08-21 18:54:58,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:58,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512269216] [2021-08-21 18:54:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:58,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:58,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:58,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512269216] [2021-08-21 18:54:58,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512269216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:58,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956722474] [2021-08-21 18:54:58,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:58,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:58,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:58,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:58,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:54:58,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:58,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:58,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:54:58,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:58,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956722474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:58,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:58,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:54:58,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283011419] [2021-08-21 18:54:58,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:54:58,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:58,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:54:58,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:58,549 INFO L87 Difference]: Start difference. First operand 40711 states and 65281 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:58,788 INFO L93 Difference]: Finished difference Result 43212 states and 70520 transitions. [2021-08-21 18:54:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:54:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:54:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:58,868 INFO L225 Difference]: With dead ends: 43212 [2021-08-21 18:54:58,868 INFO L226 Difference]: Without dead ends: 43202 [2021-08-21 18:54:58,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:54:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43202 states. [2021-08-21 18:54:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43202 to 40731. [2021-08-21 18:54:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40731 states, 40730 states have (on average 1.6057697029216793) internal successors, (65403), 40730 states have internal predecessors, (65403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40731 states to 40731 states and 65403 transitions. [2021-08-21 18:54:59,716 INFO L78 Accepts]: Start accepts. Automaton has 40731 states and 65403 transitions. Word has length 35 [2021-08-21 18:54:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:59,716 INFO L470 AbstractCegarLoop]: Abstraction has 40731 states and 65403 transitions. [2021-08-21 18:54:59,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 40731 states and 65403 transitions. [2021-08-21 18:54:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:59,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:59,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:59,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:00,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:55:00,009 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash -84117559, now seen corresponding path program 1 times [2021-08-21 18:55:00,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:00,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860709899] [2021-08-21 18:55:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:00,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:00,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:00,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860709899] [2021-08-21 18:55:00,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860709899] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:00,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:00,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:00,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605157290] [2021-08-21 18:55:00,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:00,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:00,094 INFO L87 Difference]: Start difference. First operand 40731 states and 65403 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:00,512 INFO L93 Difference]: Finished difference Result 43723 states and 71259 transitions. [2021-08-21 18:55:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:00,697 INFO L225 Difference]: With dead ends: 43723 [2021-08-21 18:55:00,698 INFO L226 Difference]: Without dead ends: 43713 [2021-08-21 18:55:00,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43713 states. [2021-08-21 18:55:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43713 to 40757. [2021-08-21 18:55:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40757 states, 40756 states have (on average 1.6076160565315536) internal successors, (65520), 40756 states have internal predecessors, (65520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40757 states to 40757 states and 65520 transitions. [2021-08-21 18:55:01,692 INFO L78 Accepts]: Start accepts. Automaton has 40757 states and 65520 transitions. Word has length 35 [2021-08-21 18:55:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:01,692 INFO L470 AbstractCegarLoop]: Abstraction has 40757 states and 65520 transitions. [2021-08-21 18:55:01,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 40757 states and 65520 transitions. [2021-08-21 18:55:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:01,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:01,771 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:01,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-21 18:55:01,771 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:01,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1648236651, now seen corresponding path program 1 times [2021-08-21 18:55:01,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:01,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818113940] [2021-08-21 18:55:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:01,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:01,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:01,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818113940] [2021-08-21 18:55:01,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818113940] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:01,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:01,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:01,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764578423] [2021-08-21 18:55:01,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:01,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:01,865 INFO L87 Difference]: Start difference. First operand 40757 states and 65520 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:02,281 INFO L93 Difference]: Finished difference Result 43824 states and 71848 transitions. [2021-08-21 18:55:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:02,401 INFO L225 Difference]: With dead ends: 43824 [2021-08-21 18:55:02,401 INFO L226 Difference]: Without dead ends: 43814 [2021-08-21 18:55:02,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43814 states. [2021-08-21 18:55:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43814 to 40796. [2021-08-21 18:55:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40796 states, 40795 states have (on average 1.6103934305674714) internal successors, (65696), 40795 states have internal predecessors, (65696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40796 states to 40796 states and 65696 transitions. [2021-08-21 18:55:03,254 INFO L78 Accepts]: Start accepts. Automaton has 40796 states and 65696 transitions. Word has length 35 [2021-08-21 18:55:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:03,254 INFO L470 AbstractCegarLoop]: Abstraction has 40796 states and 65696 transitions. [2021-08-21 18:55:03,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 40796 states and 65696 transitions. [2021-08-21 18:55:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:03,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:03,313 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:03,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-21 18:55:03,313 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1332646647, now seen corresponding path program 1 times [2021-08-21 18:55:03,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:03,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691518245] [2021-08-21 18:55:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:03,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:03,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:03,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691518245] [2021-08-21 18:55:03,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691518245] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:03,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:03,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:03,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020141017] [2021-08-21 18:55:03,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:03,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:03,572 INFO L87 Difference]: Start difference. First operand 40796 states and 65696 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:03,815 INFO L93 Difference]: Finished difference Result 43574 states and 70958 transitions. [2021-08-21 18:55:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:03,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:03,932 INFO L225 Difference]: With dead ends: 43574 [2021-08-21 18:55:03,932 INFO L226 Difference]: Without dead ends: 43560 [2021-08-21 18:55:03,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43560 states. [2021-08-21 18:55:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43560 to 40807. [2021-08-21 18:55:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40807 states, 40806 states have (on average 1.6111111111111112) internal successors, (65743), 40806 states have internal predecessors, (65743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40807 states to 40807 states and 65743 transitions. [2021-08-21 18:55:04,697 INFO L78 Accepts]: Start accepts. Automaton has 40807 states and 65743 transitions. Word has length 35 [2021-08-21 18:55:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:04,697 INFO L470 AbstractCegarLoop]: Abstraction has 40807 states and 65743 transitions. [2021-08-21 18:55:04,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 40807 states and 65743 transitions. [2021-08-21 18:55:04,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:04,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:04,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:04,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-21 18:55:04,756 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:04,756 INFO L82 PathProgramCache]: Analyzing trace with hash 982766505, now seen corresponding path program 1 times [2021-08-21 18:55:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:04,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089943454] [2021-08-21 18:55:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:04,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:04,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:04,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089943454] [2021-08-21 18:55:04,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089943454] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:04,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:04,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:04,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970614294] [2021-08-21 18:55:04,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:04,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:04,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:04,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:04,804 INFO L87 Difference]: Start difference. First operand 40807 states and 65743 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:05,050 INFO L93 Difference]: Finished difference Result 43733 states and 71688 transitions. [2021-08-21 18:55:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:05,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:05,140 INFO L225 Difference]: With dead ends: 43733 [2021-08-21 18:55:05,140 INFO L226 Difference]: Without dead ends: 43723 [2021-08-21 18:55:05,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43723 states. [2021-08-21 18:55:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43723 to 40820. [2021-08-21 18:55:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40820 states, 40819 states have (on average 1.6122148999240549) internal successors, (65809), 40819 states have internal predecessors, (65809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40820 states to 40820 states and 65809 transitions. [2021-08-21 18:55:05,894 INFO L78 Accepts]: Start accepts. Automaton has 40820 states and 65809 transitions. Word has length 35 [2021-08-21 18:55:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:05,894 INFO L470 AbstractCegarLoop]: Abstraction has 40820 states and 65809 transitions. [2021-08-21 18:55:05,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 40820 states and 65809 transitions. [2021-08-21 18:55:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:05,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:05,952 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:05,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-21 18:55:05,952 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:05,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1633887401, now seen corresponding path program 1 times [2021-08-21 18:55:05,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:05,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323348061] [2021-08-21 18:55:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:05,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:06,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:06,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323348061] [2021-08-21 18:55:06,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323348061] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:06,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:06,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:06,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710222617] [2021-08-21 18:55:06,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:06,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:06,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:06,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:06,242 INFO L87 Difference]: Start difference. First operand 40820 states and 65809 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:06,447 INFO L93 Difference]: Finished difference Result 43856 states and 72210 transitions. [2021-08-21 18:55:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:06,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:06,527 INFO L225 Difference]: With dead ends: 43856 [2021-08-21 18:55:06,527 INFO L226 Difference]: Without dead ends: 43846 [2021-08-21 18:55:06,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43846 states. [2021-08-21 18:55:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43846 to 40864. [2021-08-21 18:55:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40864 states, 40863 states have (on average 1.6164990333553582) internal successors, (66055), 40863 states have internal predecessors, (66055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40864 states to 40864 states and 66055 transitions. [2021-08-21 18:55:07,237 INFO L78 Accepts]: Start accepts. Automaton has 40864 states and 66055 transitions. Word has length 35 [2021-08-21 18:55:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:07,238 INFO L470 AbstractCegarLoop]: Abstraction has 40864 states and 66055 transitions. [2021-08-21 18:55:07,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 40864 states and 66055 transitions. [2021-08-21 18:55:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:07,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:07,300 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:07,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-21 18:55:07,300 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1094444859, now seen corresponding path program 2 times [2021-08-21 18:55:07,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:07,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129932444] [2021-08-21 18:55:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:07,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:07,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:07,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129932444] [2021-08-21 18:55:07,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129932444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:07,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172623216] [2021-08-21 18:55:07,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:07,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:07,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:07,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:07,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:55:07,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:07,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:07,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:07,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:07,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172623216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:07,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:07,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:07,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79269750] [2021-08-21 18:55:07,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:07,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:07,806 INFO L87 Difference]: Start difference. First operand 40864 states and 66055 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:08,209 INFO L93 Difference]: Finished difference Result 43462 states and 71585 transitions. [2021-08-21 18:55:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:08,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:08,287 INFO L225 Difference]: With dead ends: 43462 [2021-08-21 18:55:08,287 INFO L226 Difference]: Without dead ends: 43452 [2021-08-21 18:55:08,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43452 states. [2021-08-21 18:55:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43452 to 40904. [2021-08-21 18:55:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40904 states, 40903 states have (on average 1.6201012150697993) internal successors, (66267), 40903 states have internal predecessors, (66267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40904 states to 40904 states and 66267 transitions. [2021-08-21 18:55:09,030 INFO L78 Accepts]: Start accepts. Automaton has 40904 states and 66267 transitions. Word has length 35 [2021-08-21 18:55:09,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:09,030 INFO L470 AbstractCegarLoop]: Abstraction has 40904 states and 66267 transitions. [2021-08-21 18:55:09,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:09,031 INFO L276 IsEmpty]: Start isEmpty. Operand 40904 states and 66267 transitions. [2021-08-21 18:55:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:09,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:09,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:09,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:09,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:09,291 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:09,292 INFO L82 PathProgramCache]: Analyzing trace with hash -545847115, now seen corresponding path program 2 times [2021-08-21 18:55:09,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:09,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119621827] [2021-08-21 18:55:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:09,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:09,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:09,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119621827] [2021-08-21 18:55:09,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119621827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:09,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207501561] [2021-08-21 18:55:09,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:09,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:09,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:09,351 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:09,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:55:09,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:09,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:09,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:09,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207501561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:09,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:09,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:09,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964460090] [2021-08-21 18:55:09,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:09,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:09,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:09,837 INFO L87 Difference]: Start difference. First operand 40904 states and 66267 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:10,043 INFO L93 Difference]: Finished difference Result 43477 states and 71697 transitions. [2021-08-21 18:55:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:10,316 INFO L225 Difference]: With dead ends: 43477 [2021-08-21 18:55:10,316 INFO L226 Difference]: Without dead ends: 43467 [2021-08-21 18:55:10,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:10,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43467 states. [2021-08-21 18:55:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43467 to 40929. [2021-08-21 18:55:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40929 states, 40928 states have (on average 1.6223367865519938) internal successors, (66399), 40928 states have internal predecessors, (66399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40929 states to 40929 states and 66399 transitions. [2021-08-21 18:55:11,026 INFO L78 Accepts]: Start accepts. Automaton has 40929 states and 66399 transitions. Word has length 35 [2021-08-21 18:55:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:11,027 INFO L470 AbstractCegarLoop]: Abstraction has 40929 states and 66399 transitions. [2021-08-21 18:55:11,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 40929 states and 66399 transitions. [2021-08-21 18:55:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:11,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:11,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:11,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:11,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:11,296 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:11,296 INFO L82 PathProgramCache]: Analyzing trace with hash -957295423, now seen corresponding path program 2 times [2021-08-21 18:55:11,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:11,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322245827] [2021-08-21 18:55:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:11,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:11,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:11,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322245827] [2021-08-21 18:55:11,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322245827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:11,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48913702] [2021-08-21 18:55:11,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:11,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:11,377 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:11,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:55:11,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:11,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:11,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:11,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:11,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48913702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:11,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:11,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:11,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354117939] [2021-08-21 18:55:11,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:11,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:11,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:11,843 INFO L87 Difference]: Start difference. First operand 40929 states and 66399 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:12,086 INFO L93 Difference]: Finished difference Result 43522 states and 71937 transitions. [2021-08-21 18:55:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:12,165 INFO L225 Difference]: With dead ends: 43522 [2021-08-21 18:55:12,166 INFO L226 Difference]: Without dead ends: 43512 [2021-08-21 18:55:12,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43512 states. [2021-08-21 18:55:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43512 to 40959. [2021-08-21 18:55:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40959 states, 40958 states have (on average 1.6254699936520338) internal successors, (66576), 40958 states have internal predecessors, (66576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40959 states to 40959 states and 66576 transitions. [2021-08-21 18:55:12,856 INFO L78 Accepts]: Start accepts. Automaton has 40959 states and 66576 transitions. Word has length 35 [2021-08-21 18:55:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:12,856 INFO L470 AbstractCegarLoop]: Abstraction has 40959 states and 66576 transitions. [2021-08-21 18:55:12,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 40959 states and 66576 transitions. [2021-08-21 18:55:13,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:13,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:13,070 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:13,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:13,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 18:55:13,271 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1717753553, now seen corresponding path program 2 times [2021-08-21 18:55:13,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:13,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651261766] [2021-08-21 18:55:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:13,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:13,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:13,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651261766] [2021-08-21 18:55:13,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651261766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:13,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349215562] [2021-08-21 18:55:13,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:13,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:13,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:13,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:55:13,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:13,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:13,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:13,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349215562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:13,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:13,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:13,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919902519] [2021-08-21 18:55:13,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:13,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:13,855 INFO L87 Difference]: Start difference. First operand 40959 states and 66576 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:14,052 INFO L93 Difference]: Finished difference Result 43821 states and 72406 transitions. [2021-08-21 18:55:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:14,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:14,132 INFO L225 Difference]: With dead ends: 43821 [2021-08-21 18:55:14,132 INFO L226 Difference]: Without dead ends: 43811 [2021-08-21 18:55:14,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43811 states. [2021-08-21 18:55:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43811 to 40989. [2021-08-21 18:55:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40989 states, 40988 states have (on average 1.6276227188445398) internal successors, (66713), 40988 states have internal predecessors, (66713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40989 states to 40989 states and 66713 transitions. [2021-08-21 18:55:14,814 INFO L78 Accepts]: Start accepts. Automaton has 40989 states and 66713 transitions. Word has length 35 [2021-08-21 18:55:14,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:14,814 INFO L470 AbstractCegarLoop]: Abstraction has 40989 states and 66713 transitions. [2021-08-21 18:55:14,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand 40989 states and 66713 transitions. [2021-08-21 18:55:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:14,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:14,876 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:14,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:15,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:15,076 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:15,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1854299793, now seen corresponding path program 1 times [2021-08-21 18:55:15,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:15,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321266946] [2021-08-21 18:55:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:15,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:15,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:15,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321266946] [2021-08-21 18:55:15,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321266946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:15,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:15,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:15,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832291416] [2021-08-21 18:55:15,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:15,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:15,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:15,148 INFO L87 Difference]: Start difference. First operand 40989 states and 66713 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:15,430 INFO L93 Difference]: Finished difference Result 44246 states and 73052 transitions. [2021-08-21 18:55:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:15,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:15,517 INFO L225 Difference]: With dead ends: 44246 [2021-08-21 18:55:15,517 INFO L226 Difference]: Without dead ends: 44236 [2021-08-21 18:55:15,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44236 states. [2021-08-21 18:55:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44236 to 41053. [2021-08-21 18:55:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41053 states, 41052 states have (on average 1.630225080385852) internal successors, (66924), 41052 states have internal predecessors, (66924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41053 states to 41053 states and 66924 transitions. [2021-08-21 18:55:16,229 INFO L78 Accepts]: Start accepts. Automaton has 41053 states and 66924 transitions. Word has length 35 [2021-08-21 18:55:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:16,229 INFO L470 AbstractCegarLoop]: Abstraction has 41053 states and 66924 transitions. [2021-08-21 18:55:16,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 41053 states and 66924 transitions. [2021-08-21 18:55:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:16,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:16,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:16,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-21 18:55:16,290 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:16,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2125077499, now seen corresponding path program 1 times [2021-08-21 18:55:16,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:16,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177979248] [2021-08-21 18:55:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:16,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:16,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:16,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177979248] [2021-08-21 18:55:16,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177979248] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:16,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:16,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:16,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275893109] [2021-08-21 18:55:16,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:16,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:16,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:16,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:16,335 INFO L87 Difference]: Start difference. First operand 41053 states and 66924 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:16,503 INFO L93 Difference]: Finished difference Result 44026 states and 72239 transitions. [2021-08-21 18:55:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:16,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:16,587 INFO L225 Difference]: With dead ends: 44026 [2021-08-21 18:55:16,587 INFO L226 Difference]: Without dead ends: 44012 [2021-08-21 18:55:16,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:16,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44012 states. [2021-08-21 18:55:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44012 to 41116. [2021-08-21 18:55:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41116 states, 41115 states have (on average 1.631034902103855) internal successors, (67060), 41115 states have internal predecessors, (67060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41116 states to 41116 states and 67060 transitions. [2021-08-21 18:55:17,324 INFO L78 Accepts]: Start accepts. Automaton has 41116 states and 67060 transitions. Word has length 35 [2021-08-21 18:55:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:17,324 INFO L470 AbstractCegarLoop]: Abstraction has 41116 states and 67060 transitions. [2021-08-21 18:55:17,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 41116 states and 67060 transitions. [2021-08-21 18:55:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:17,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:17,383 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:17,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-21 18:55:17,383 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:17,384 INFO L82 PathProgramCache]: Analyzing trace with hash 190335653, now seen corresponding path program 1 times [2021-08-21 18:55:17,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:17,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682059537] [2021-08-21 18:55:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:17,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:17,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:17,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682059537] [2021-08-21 18:55:17,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682059537] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:17,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:17,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:17,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049635968] [2021-08-21 18:55:17,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:17,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:17,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:17,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:17,627 INFO L87 Difference]: Start difference. First operand 41116 states and 67060 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:17,816 INFO L93 Difference]: Finished difference Result 44246 states and 73042 transitions. [2021-08-21 18:55:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:17,897 INFO L225 Difference]: With dead ends: 44246 [2021-08-21 18:55:17,898 INFO L226 Difference]: Without dead ends: 44236 [2021-08-21 18:55:17,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44236 states. [2021-08-21 18:55:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44236 to 41176. [2021-08-21 18:55:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41176 states, 41175 states have (on average 1.6329083181542199) internal successors, (67235), 41175 states have internal predecessors, (67235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41176 states to 41176 states and 67235 transitions. [2021-08-21 18:55:18,601 INFO L78 Accepts]: Start accepts. Automaton has 41176 states and 67235 transitions. Word has length 35 [2021-08-21 18:55:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:18,601 INFO L470 AbstractCegarLoop]: Abstraction has 41176 states and 67235 transitions. [2021-08-21 18:55:18,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 41176 states and 67235 transitions. [2021-08-21 18:55:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:18,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:18,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:18,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-21 18:55:18,661 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:18,661 INFO L82 PathProgramCache]: Analyzing trace with hash 841456549, now seen corresponding path program 1 times [2021-08-21 18:55:18,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:18,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068116454] [2021-08-21 18:55:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:18,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:18,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:18,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068116454] [2021-08-21 18:55:18,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068116454] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:18,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:18,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:18,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209866998] [2021-08-21 18:55:18,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:18,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:18,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:18,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:18,710 INFO L87 Difference]: Start difference. First operand 41176 states and 67235 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:18,905 INFO L93 Difference]: Finished difference Result 44420 states and 73630 transitions. [2021-08-21 18:55:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:18,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:18,988 INFO L225 Difference]: With dead ends: 44420 [2021-08-21 18:55:18,988 INFO L226 Difference]: Without dead ends: 44410 [2021-08-21 18:55:18,988 INFO L781 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 [2021-08-21 18:55:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44410 states. [2021-08-21 18:55:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44410 to 41212. [2021-08-21 18:55:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41212 states, 41211 states have (on average 1.6350246293465336) internal successors, (67381), 41211 states have internal predecessors, (67381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41212 states to 41212 states and 67381 transitions. [2021-08-21 18:55:19,773 INFO L78 Accepts]: Start accepts. Automaton has 41212 states and 67381 transitions. Word has length 35 [2021-08-21 18:55:19,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:19,773 INFO L470 AbstractCegarLoop]: Abstraction has 41212 states and 67381 transitions. [2021-08-21 18:55:19,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:19,773 INFO L276 IsEmpty]: Start isEmpty. Operand 41212 states and 67381 transitions. [2021-08-21 18:55:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:20,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:20,079 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:20,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-21 18:55:20,079 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:20,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1831030989, now seen corresponding path program 2 times [2021-08-21 18:55:20,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:20,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884949121] [2021-08-21 18:55:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:20,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:20,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:20,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884949121] [2021-08-21 18:55:20,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884949121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:20,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526716240] [2021-08-21 18:55:20,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:20,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:20,140 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:20,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:55:20,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:20,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:20,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526716240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:20,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:20,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:20,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440229771] [2021-08-21 18:55:20,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:20,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:20,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:20,658 INFO L87 Difference]: Start difference. First operand 41212 states and 67381 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:20,842 INFO L93 Difference]: Finished difference Result 44096 states and 73202 transitions. [2021-08-21 18:55:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:20,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:20,923 INFO L225 Difference]: With dead ends: 44096 [2021-08-21 18:55:20,923 INFO L226 Difference]: Without dead ends: 44086 [2021-08-21 18:55:20,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:21,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44086 states. [2021-08-21 18:55:21,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44086 to 41247. [2021-08-21 18:55:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41247 states, 41246 states have (on average 1.6371526935945304) internal successors, (67526), 41246 states have internal predecessors, (67526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41247 states to 41247 states and 67526 transitions. [2021-08-21 18:55:21,595 INFO L78 Accepts]: Start accepts. Automaton has 41247 states and 67526 transitions. Word has length 35 [2021-08-21 18:55:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:21,595 INFO L470 AbstractCegarLoop]: Abstraction has 41247 states and 67526 transitions. [2021-08-21 18:55:21,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 41247 states and 67526 transitions. [2021-08-21 18:55:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:21,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:21,654 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:21,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:21,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:55:21,857 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1377921245, now seen corresponding path program 2 times [2021-08-21 18:55:21,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:21,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764546023] [2021-08-21 18:55:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:21,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:21,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:21,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764546023] [2021-08-21 18:55:21,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764546023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:21,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204258767] [2021-08-21 18:55:21,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:21,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:21,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:21,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:22,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:55:22,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:22,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:22,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204258767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:22,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:22,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:22,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958192217] [2021-08-21 18:55:22,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:22,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:22,560 INFO L87 Difference]: Start difference. First operand 41247 states and 67526 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:22,741 INFO L93 Difference]: Finished difference Result 43813 states and 72815 transitions. [2021-08-21 18:55:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:22,823 INFO L225 Difference]: With dead ends: 43813 [2021-08-21 18:55:22,823 INFO L226 Difference]: Without dead ends: 43803 [2021-08-21 18:55:22,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43803 states. [2021-08-21 18:55:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43803 to 41262. [2021-08-21 18:55:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41262 states, 41261 states have (on average 1.6385691088437022) internal successors, (67609), 41261 states have internal predecessors, (67609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:23,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41262 states to 41262 states and 67609 transitions. [2021-08-21 18:55:23,496 INFO L78 Accepts]: Start accepts. Automaton has 41262 states and 67609 transitions. Word has length 35 [2021-08-21 18:55:23,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:23,496 INFO L470 AbstractCegarLoop]: Abstraction has 41262 states and 67609 transitions. [2021-08-21 18:55:23,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 41262 states and 67609 transitions. [2021-08-21 18:55:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:23,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:23,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:23,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:23,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:23,758 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:23,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:23,758 INFO L82 PathProgramCache]: Analyzing trace with hash 287730109, now seen corresponding path program 2 times [2021-08-21 18:55:23,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:23,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840784382] [2021-08-21 18:55:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:23,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:23,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:23,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840784382] [2021-08-21 18:55:23,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840784382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:23,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189255233] [2021-08-21 18:55:23,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:23,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:23,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:23,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:23,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:55:24,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:24,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:24,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189255233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:24,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:24,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:24,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349663344] [2021-08-21 18:55:24,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:24,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:24,462 INFO L87 Difference]: Start difference. First operand 41262 states and 67609 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:24,643 INFO L93 Difference]: Finished difference Result 44117 states and 73502 transitions. [2021-08-21 18:55:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:24,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:24,728 INFO L225 Difference]: With dead ends: 44117 [2021-08-21 18:55:24,728 INFO L226 Difference]: Without dead ends: 44107 [2021-08-21 18:55:24,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44107 states. [2021-08-21 18:55:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44107 to 41287. [2021-08-21 18:55:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41287 states, 41286 states have (on average 1.6407014484328828) internal successors, (67738), 41286 states have internal predecessors, (67738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41287 states to 41287 states and 67738 transitions. [2021-08-21 18:55:25,388 INFO L78 Accepts]: Start accepts. Automaton has 41287 states and 67738 transitions. Word has length 35 [2021-08-21 18:55:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:25,388 INFO L470 AbstractCegarLoop]: Abstraction has 41287 states and 67738 transitions. [2021-08-21 18:55:25,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 41287 states and 67738 transitions. [2021-08-21 18:55:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:25,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:25,448 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:25,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:25,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:25,649 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1538310209, now seen corresponding path program 2 times [2021-08-21 18:55:25,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:25,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543099476] [2021-08-21 18:55:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:25,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:25,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:25,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543099476] [2021-08-21 18:55:25,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543099476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:25,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438968507] [2021-08-21 18:55:25,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:25,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:25,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:25,703 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:25,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:55:26,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:26,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:26,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:26,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:26,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438968507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:26,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:26,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:26,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990790653] [2021-08-21 18:55:26,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:26,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:26,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:26,440 INFO L87 Difference]: Start difference. First operand 41287 states and 67738 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:26,631 INFO L93 Difference]: Finished difference Result 44125 states and 73564 transitions. [2021-08-21 18:55:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:26,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:26,712 INFO L225 Difference]: With dead ends: 44125 [2021-08-21 18:55:26,712 INFO L226 Difference]: Without dead ends: 44115 [2021-08-21 18:55:26,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44115 states. [2021-08-21 18:55:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44115 to 41317. [2021-08-21 18:55:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41317 states, 41316 states have (on average 1.6429228386097396) internal successors, (67879), 41316 states have internal predecessors, (67879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41317 states to 41317 states and 67879 transitions. [2021-08-21 18:55:27,397 INFO L78 Accepts]: Start accepts. Automaton has 41317 states and 67879 transitions. Word has length 35 [2021-08-21 18:55:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:27,397 INFO L470 AbstractCegarLoop]: Abstraction has 41317 states and 67879 transitions. [2021-08-21 18:55:27,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 41317 states and 67879 transitions. [2021-08-21 18:55:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:27,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:27,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:27,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:27,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 18:55:27,658 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash 830957105, now seen corresponding path program 2 times [2021-08-21 18:55:27,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:27,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80174389] [2021-08-21 18:55:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:27,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:27,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:27,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80174389] [2021-08-21 18:55:27,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80174389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:27,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264228488] [2021-08-21 18:55:27,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:27,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:27,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:27,706 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:27,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:55:28,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:28,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:28,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:28,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264228488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:28,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:28,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:28,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895869423] [2021-08-21 18:55:28,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:28,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:28,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:28,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:28,491 INFO L87 Difference]: Start difference. First operand 41317 states and 67879 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:28,706 INFO L93 Difference]: Finished difference Result 43833 states and 73119 transitions. [2021-08-21 18:55:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:28,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:28,788 INFO L225 Difference]: With dead ends: 43833 [2021-08-21 18:55:28,788 INFO L226 Difference]: Without dead ends: 43823 [2021-08-21 18:55:28,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43823 states. [2021-08-21 18:55:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43823 to 41327. [2021-08-21 18:55:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41327 states, 41326 states have (on average 1.644049750762232) internal successors, (67942), 41326 states have internal predecessors, (67942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41327 states to 41327 states and 67942 transitions. [2021-08-21 18:55:29,470 INFO L78 Accepts]: Start accepts. Automaton has 41327 states and 67942 transitions. Word has length 35 [2021-08-21 18:55:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:29,470 INFO L470 AbstractCegarLoop]: Abstraction has 41327 states and 67942 transitions. [2021-08-21 18:55:29,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 41327 states and 67942 transitions. [2021-08-21 18:55:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:29,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:29,534 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:29,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:29,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:29,734 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:29,735 INFO L82 PathProgramCache]: Analyzing trace with hash -652303935, now seen corresponding path program 2 times [2021-08-21 18:55:29,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:29,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574155253] [2021-08-21 18:55:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:29,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:29,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:29,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574155253] [2021-08-21 18:55:29,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574155253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:29,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490672452] [2021-08-21 18:55:29,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:29,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:29,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:29,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:29,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:55:30,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:30,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:30,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:30,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:30,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490672452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:30,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:30,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:30,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126935505] [2021-08-21 18:55:30,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:30,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:30,541 INFO L87 Difference]: Start difference. First operand 41327 states and 67942 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:30,722 INFO L93 Difference]: Finished difference Result 44223 states and 73675 transitions. [2021-08-21 18:55:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:30,805 INFO L225 Difference]: With dead ends: 44223 [2021-08-21 18:55:30,805 INFO L226 Difference]: Without dead ends: 44213 [2021-08-21 18:55:30,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44213 states. [2021-08-21 18:55:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44213 to 41371. [2021-08-21 18:55:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41371 states, 41370 states have (on average 1.646313753927967) internal successors, (68108), 41370 states have internal predecessors, (68108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41371 states to 41371 states and 68108 transitions. [2021-08-21 18:55:31,518 INFO L78 Accepts]: Start accepts. Automaton has 41371 states and 68108 transitions. Word has length 35 [2021-08-21 18:55:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:31,518 INFO L470 AbstractCegarLoop]: Abstraction has 41371 states and 68108 transitions. [2021-08-21 18:55:31,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand 41371 states and 68108 transitions. [2021-08-21 18:55:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:31,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:31,581 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:31,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:31,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:31,782 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1598214329, now seen corresponding path program 1 times [2021-08-21 18:55:31,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:31,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541394466] [2021-08-21 18:55:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:31,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:31,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:31,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541394466] [2021-08-21 18:55:31,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541394466] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:31,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:31,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:31,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620799779] [2021-08-21 18:55:31,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:31,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:31,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:31,829 INFO L87 Difference]: Start difference. First operand 41371 states and 68108 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:32,001 INFO L93 Difference]: Finished difference Result 44437 states and 73872 transitions. [2021-08-21 18:55:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:32,084 INFO L225 Difference]: With dead ends: 44437 [2021-08-21 18:55:32,084 INFO L226 Difference]: Without dead ends: 44423 [2021-08-21 18:55:32,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44423 states. [2021-08-21 18:55:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44423 to 41417. [2021-08-21 18:55:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41417 states, 41416 states have (on average 1.647575816109716) internal successors, (68236), 41416 states have internal predecessors, (68236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41417 states to 41417 states and 68236 transitions. [2021-08-21 18:55:32,815 INFO L78 Accepts]: Start accepts. Automaton has 41417 states and 68236 transitions. Word has length 35 [2021-08-21 18:55:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:32,815 INFO L470 AbstractCegarLoop]: Abstraction has 41417 states and 68236 transitions. [2021-08-21 18:55:32,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 41417 states and 68236 transitions. [2021-08-21 18:55:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:32,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:32,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:32,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-21 18:55:32,877 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:32,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:32,878 INFO L82 PathProgramCache]: Analyzing trace with hash -381339815, now seen corresponding path program 1 times [2021-08-21 18:55:32,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:32,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035929603] [2021-08-21 18:55:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:32,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:32,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:32,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035929603] [2021-08-21 18:55:32,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035929603] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:32,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:32,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:32,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884213383] [2021-08-21 18:55:32,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:32,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:32,923 INFO L87 Difference]: Start difference. First operand 41417 states and 68236 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:33,296 INFO L93 Difference]: Finished difference Result 44639 states and 74688 transitions. [2021-08-21 18:55:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:33,379 INFO L225 Difference]: With dead ends: 44639 [2021-08-21 18:55:33,379 INFO L226 Difference]: Without dead ends: 44629 [2021-08-21 18:55:33,379 INFO L781 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 [2021-08-21 18:55:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44629 states. [2021-08-21 18:55:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44629 to 41468. [2021-08-21 18:55:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41468 states, 41467 states have (on average 1.6502520076205176) internal successors, (68431), 41467 states have internal predecessors, (68431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41468 states to 41468 states and 68431 transitions. [2021-08-21 18:55:34,105 INFO L78 Accepts]: Start accepts. Automaton has 41468 states and 68431 transitions. Word has length 35 [2021-08-21 18:55:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:34,105 INFO L470 AbstractCegarLoop]: Abstraction has 41468 states and 68431 transitions. [2021-08-21 18:55:34,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 41468 states and 68431 transitions. [2021-08-21 18:55:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:34,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:34,166 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:34,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-21 18:55:34,166 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:34,166 INFO L82 PathProgramCache]: Analyzing trace with hash 269781081, now seen corresponding path program 1 times [2021-08-21 18:55:34,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:34,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300451328] [2021-08-21 18:55:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:34,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:34,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:34,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300451328] [2021-08-21 18:55:34,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300451328] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:34,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:34,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:34,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930108436] [2021-08-21 18:55:34,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:34,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:34,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:34,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:34,226 INFO L87 Difference]: Start difference. First operand 41468 states and 68431 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:34,470 INFO L93 Difference]: Finished difference Result 44818 states and 75363 transitions. [2021-08-21 18:55:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:34,555 INFO L225 Difference]: With dead ends: 44818 [2021-08-21 18:55:34,555 INFO L226 Difference]: Without dead ends: 44808 [2021-08-21 18:55:34,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44808 states. [2021-08-21 18:55:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44808 to 41518. [2021-08-21 18:55:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41518 states, 41517 states have (on average 1.6534672543777247) internal successors, (68647), 41517 states have internal predecessors, (68647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41518 states to 41518 states and 68647 transitions. [2021-08-21 18:55:35,367 INFO L78 Accepts]: Start accepts. Automaton has 41518 states and 68647 transitions. Word has length 35 [2021-08-21 18:55:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:35,367 INFO L470 AbstractCegarLoop]: Abstraction has 41518 states and 68647 transitions. [2021-08-21 18:55:35,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 41518 states and 68647 transitions. [2021-08-21 18:55:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:35,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:35,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:35,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-21 18:55:35,645 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1506076987, now seen corresponding path program 2 times [2021-08-21 18:55:35,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:35,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94037383] [2021-08-21 18:55:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:35,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:35,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:35,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94037383] [2021-08-21 18:55:35,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94037383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:35,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978140975] [2021-08-21 18:55:35,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:35,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:35,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:35,724 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:35,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:55:36,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:36,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:36,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:36,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978140975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:36,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:36,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:36,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419422506] [2021-08-21 18:55:36,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:36,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:36,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:36,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:36,374 INFO L87 Difference]: Start difference. First operand 41518 states and 68647 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:36,548 INFO L93 Difference]: Finished difference Result 44408 states and 74500 transitions. [2021-08-21 18:55:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:36,631 INFO L225 Difference]: With dead ends: 44408 [2021-08-21 18:55:36,631 INFO L226 Difference]: Without dead ends: 44398 [2021-08-21 18:55:36,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44398 states. [2021-08-21 18:55:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44398 to 41553. [2021-08-21 18:55:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41553 states, 41552 states have (on average 1.6556363111282248) internal successors, (68795), 41552 states have internal predecessors, (68795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41553 states to 41553 states and 68795 transitions. [2021-08-21 18:55:37,314 INFO L78 Accepts]: Start accepts. Automaton has 41553 states and 68795 transitions. Word has length 35 [2021-08-21 18:55:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:37,314 INFO L470 AbstractCegarLoop]: Abstraction has 41553 states and 68795 transitions. [2021-08-21 18:55:37,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 41553 states and 68795 transitions. [2021-08-21 18:55:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:37,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:37,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:37,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 18:55:37,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 18:55:37,678 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:37,678 INFO L82 PathProgramCache]: Analyzing trace with hash -479781951, now seen corresponding path program 2 times [2021-08-21 18:55:37,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:37,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611739106] [2021-08-21 18:55:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:37,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:37,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:37,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611739106] [2021-08-21 18:55:37,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611739106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:37,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979442733] [2021-08-21 18:55:37,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:37,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:37,725 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:37,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:55:38,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:38,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:38,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:38,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979442733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:38,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:38,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:38,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934781223] [2021-08-21 18:55:38,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:38,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:38,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:38,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:38,423 INFO L87 Difference]: Start difference. First operand 41553 states and 68795 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:38,611 INFO L93 Difference]: Finished difference Result 44389 states and 74777 transitions. [2021-08-21 18:55:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:38,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:38,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:38,813 INFO L225 Difference]: With dead ends: 44389 [2021-08-21 18:55:38,813 INFO L226 Difference]: Without dead ends: 44379 [2021-08-21 18:55:38,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:38,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44379 states. [2021-08-21 18:55:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44379 to 41593. [2021-08-21 18:55:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41593 states, 41592 states have (on average 1.658852663973841) internal successors, (68995), 41592 states have internal predecessors, (68995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41593 states to 41593 states and 68995 transitions. [2021-08-21 18:55:39,527 INFO L78 Accepts]: Start accepts. Automaton has 41593 states and 68995 transitions. Word has length 35 [2021-08-21 18:55:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:39,527 INFO L470 AbstractCegarLoop]: Abstraction has 41593 states and 68995 transitions. [2021-08-21 18:55:39,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 41593 states and 68995 transitions. [2021-08-21 18:55:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:39,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:39,584 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:39,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:39,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:55:39,785 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1359657039, now seen corresponding path program 2 times [2021-08-21 18:55:39,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:39,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090768147] [2021-08-21 18:55:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:39,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:39,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:39,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090768147] [2021-08-21 18:55:39,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090768147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:39,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796260294] [2021-08-21 18:55:39,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:39,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:39,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:39,829 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:39,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:55:40,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:40,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:40,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:40,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796260294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:40,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:40,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:40,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067909879] [2021-08-21 18:55:40,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:40,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:40,529 INFO L87 Difference]: Start difference. First operand 41593 states and 68995 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:40,878 INFO L93 Difference]: Finished difference Result 44359 states and 74638 transitions. [2021-08-21 18:55:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:40,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:40,955 INFO L225 Difference]: With dead ends: 44359 [2021-08-21 18:55:40,955 INFO L226 Difference]: Without dead ends: 44349 [2021-08-21 18:55:40,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44349 states. [2021-08-21 18:55:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44349 to 41613. [2021-08-21 18:55:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41613 states, 41612 states have (on average 1.6606027107565124) internal successors, (69101), 41612 states have internal predecessors, (69101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41613 states to 41613 states and 69101 transitions. [2021-08-21 18:55:41,679 INFO L78 Accepts]: Start accepts. Automaton has 41613 states and 69101 transitions. Word has length 35 [2021-08-21 18:55:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:41,679 INFO L470 AbstractCegarLoop]: Abstraction has 41613 states and 69101 transitions. [2021-08-21 18:55:41,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 41613 states and 69101 transitions. [2021-08-21 18:55:41,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:41,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:41,742 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:41,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 18:55:41,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:41,942 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:41,944 INFO L82 PathProgramCache]: Analyzing trace with hash 373991101, now seen corresponding path program 2 times [2021-08-21 18:55:41,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:41,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229978611] [2021-08-21 18:55:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:41,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:41,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:41,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229978611] [2021-08-21 18:55:41,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229978611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:41,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929174691] [2021-08-21 18:55:41,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:41,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:41,987 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:41,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:55:42,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:42,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:42,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:42,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929174691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:42,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:42,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:42,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702404849] [2021-08-21 18:55:42,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:42,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:42,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:42,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:42,728 INFO L87 Difference]: Start difference. First operand 41613 states and 69101 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:43,035 INFO L93 Difference]: Finished difference Result 44414 states and 74994 transitions. [2021-08-21 18:55:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:43,118 INFO L225 Difference]: With dead ends: 44414 [2021-08-21 18:55:43,118 INFO L226 Difference]: Without dead ends: 44404 [2021-08-21 18:55:43,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44404 states. [2021-08-21 18:55:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44404 to 41638. [2021-08-21 18:55:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41638 states, 41637 states have (on average 1.6631841871412445) internal successors, (69250), 41637 states have internal predecessors, (69250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41638 states to 41638 states and 69250 transitions. [2021-08-21 18:55:43,844 INFO L78 Accepts]: Start accepts. Automaton has 41638 states and 69250 transitions. Word has length 35 [2021-08-21 18:55:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:43,844 INFO L470 AbstractCegarLoop]: Abstraction has 41638 states and 69250 transitions. [2021-08-21 18:55:43,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 41638 states and 69250 transitions. [2021-08-21 18:55:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:43,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:43,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:43,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:44,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:44,111 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1227764153, now seen corresponding path program 2 times [2021-08-21 18:55:44,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:44,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403316030] [2021-08-21 18:55:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:44,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:44,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:44,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403316030] [2021-08-21 18:55:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403316030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:44,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883684617] [2021-08-21 18:55:44,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:44,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:44,158 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:44,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:55:44,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:44,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:44,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:44,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:45,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883684617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:45,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:45,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:45,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942516294] [2021-08-21 18:55:45,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:45,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:45,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:45,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:45,083 INFO L87 Difference]: Start difference. First operand 41638 states and 69250 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:45,274 INFO L93 Difference]: Finished difference Result 44465 states and 75175 transitions. [2021-08-21 18:55:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:45,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:45,359 INFO L225 Difference]: With dead ends: 44465 [2021-08-21 18:55:45,359 INFO L226 Difference]: Without dead ends: 44455 [2021-08-21 18:55:45,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44455 states. [2021-08-21 18:55:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44455 to 41668. [2021-08-21 18:55:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41668 states, 41667 states have (on average 1.6657066743466051) internal successors, (69405), 41667 states have internal predecessors, (69405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41668 states to 41668 states and 69405 transitions. [2021-08-21 18:55:46,063 INFO L78 Accepts]: Start accepts. Automaton has 41668 states and 69405 transitions. Word has length 35 [2021-08-21 18:55:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:46,063 INFO L470 AbstractCegarLoop]: Abstraction has 41668 states and 69405 transitions. [2021-08-21 18:55:46,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 41668 states and 69405 transitions. [2021-08-21 18:55:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:46,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:46,124 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:46,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:46,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-21 18:55:46,324 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:46,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2081537205, now seen corresponding path program 2 times [2021-08-21 18:55:46,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:46,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692216451] [2021-08-21 18:55:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:46,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:46,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:46,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692216451] [2021-08-21 18:55:46,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692216451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:46,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382089084] [2021-08-21 18:55:46,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:46,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:46,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:46,381 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:46,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:55:47,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:47,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:47,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:47,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:47,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382089084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:47,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:47,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:47,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772706691] [2021-08-21 18:55:47,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:47,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:47,307 INFO L87 Difference]: Start difference. First operand 41668 states and 69405 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:47,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:47,491 INFO L93 Difference]: Finished difference Result 44394 states and 75053 transitions. [2021-08-21 18:55:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:47,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:47,577 INFO L225 Difference]: With dead ends: 44394 [2021-08-21 18:55:47,577 INFO L226 Difference]: Without dead ends: 44384 [2021-08-21 18:55:47,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44384 states. [2021-08-21 18:55:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44384 to 41683. [2021-08-21 18:55:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41683 states, 41682 states have (on average 1.6672664459478912) internal successors, (69495), 41682 states have internal predecessors, (69495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41683 states to 41683 states and 69495 transitions. [2021-08-21 18:55:48,273 INFO L78 Accepts]: Start accepts. Automaton has 41683 states and 69495 transitions. Word has length 35 [2021-08-21 18:55:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:48,273 INFO L470 AbstractCegarLoop]: Abstraction has 41683 states and 69495 transitions. [2021-08-21 18:55:48,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 41683 states and 69495 transitions. [2021-08-21 18:55:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:48,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:48,333 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:48,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:48,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:48,534 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1333555003, now seen corresponding path program 2 times [2021-08-21 18:55:48,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:48,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640248217] [2021-08-21 18:55:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:48,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:48,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:48,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640248217] [2021-08-21 18:55:48,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640248217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:48,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122209170] [2021-08-21 18:55:48,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:48,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:48,580 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:48,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:55:49,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:49,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:49,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122209170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:49,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:49,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:49,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037802811] [2021-08-21 18:55:49,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:49,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:49,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:49,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:49,565 INFO L87 Difference]: Start difference. First operand 41683 states and 69495 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:49,754 INFO L93 Difference]: Finished difference Result 44534 states and 75546 transitions. [2021-08-21 18:55:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:49,837 INFO L225 Difference]: With dead ends: 44534 [2021-08-21 18:55:49,837 INFO L226 Difference]: Without dead ends: 44524 [2021-08-21 18:55:49,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44524 states. [2021-08-21 18:55:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44524 to 41718. [2021-08-21 18:55:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41718 states, 41717 states have (on average 1.6707577246686003) internal successors, (69699), 41717 states have internal predecessors, (69699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41718 states to 41718 states and 69699 transitions. [2021-08-21 18:55:50,529 INFO L78 Accepts]: Start accepts. Automaton has 41718 states and 69699 transitions. Word has length 35 [2021-08-21 18:55:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:50,530 INFO L470 AbstractCegarLoop]: Abstraction has 41718 states and 69699 transitions. [2021-08-21 18:55:50,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 41718 states and 69699 transitions. [2021-08-21 18:55:50,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:50,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:50,591 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:50,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:50,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:50,792 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2126276395, now seen corresponding path program 2 times [2021-08-21 18:55:50,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:50,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36072914] [2021-08-21 18:55:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:50,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:50,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:50,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36072914] [2021-08-21 18:55:50,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36072914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:50,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022252133] [2021-08-21 18:55:50,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:50,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:50,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:50,940 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:50,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:55:51,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:51,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:51,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022252133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:51,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:51,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:51,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789724745] [2021-08-21 18:55:51,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:51,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:51,766 INFO L87 Difference]: Start difference. First operand 41718 states and 69699 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:51,949 INFO L93 Difference]: Finished difference Result 44509 states and 75270 transitions. [2021-08-21 18:55:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:52,160 INFO L225 Difference]: With dead ends: 44509 [2021-08-21 18:55:52,161 INFO L226 Difference]: Without dead ends: 44499 [2021-08-21 18:55:52,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44499 states. [2021-08-21 18:55:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44499 to 41738. [2021-08-21 18:55:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41738 states, 41737 states have (on average 1.67211347245849) internal successors, (69789), 41737 states have internal predecessors, (69789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41738 states to 41738 states and 69789 transitions. [2021-08-21 18:55:52,701 INFO L78 Accepts]: Start accepts. Automaton has 41738 states and 69789 transitions. Word has length 35 [2021-08-21 18:55:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:52,701 INFO L470 AbstractCegarLoop]: Abstraction has 41738 states and 69789 transitions. [2021-08-21 18:55:52,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 41738 states and 69789 transitions. [2021-08-21 18:55:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:52,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:52,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:52,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:53,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:53,066 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash -25248571, now seen corresponding path program 2 times [2021-08-21 18:55:53,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:53,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409718517] [2021-08-21 18:55:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:53,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:53,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:53,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409718517] [2021-08-21 18:55:53,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409718517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:53,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532920289] [2021-08-21 18:55:53,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:53,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:53,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:53,108 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:53,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:55:53,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:53,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:53,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:53,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:53,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532920289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:53,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:53,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:53,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606734021] [2021-08-21 18:55:53,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:53,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:53,949 INFO L87 Difference]: Start difference. First operand 41738 states and 69789 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:54,233 INFO L93 Difference]: Finished difference Result 44480 states and 74860 transitions. [2021-08-21 18:55:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:54,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:54,311 INFO L225 Difference]: With dead ends: 44480 [2021-08-21 18:55:54,312 INFO L226 Difference]: Without dead ends: 44470 [2021-08-21 18:55:54,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44470 states. [2021-08-21 18:55:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44470 to 41781. [2021-08-21 18:55:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41781 states, 41780 states have (on average 1.672929631402585) internal successors, (69895), 41780 states have internal predecessors, (69895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41781 states to 41781 states and 69895 transitions. [2021-08-21 18:55:55,074 INFO L78 Accepts]: Start accepts. Automaton has 41781 states and 69895 transitions. Word has length 35 [2021-08-21 18:55:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:55,074 INFO L470 AbstractCegarLoop]: Abstraction has 41781 states and 69895 transitions. [2021-08-21 18:55:55,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 41781 states and 69895 transitions. [2021-08-21 18:55:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:55,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:55,137 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:55,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:55,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:55,338 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 546464209, now seen corresponding path program 2 times [2021-08-21 18:55:55,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:55,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040073544] [2021-08-21 18:55:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:55,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:55,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:55,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040073544] [2021-08-21 18:55:55,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040073544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:55,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015540627] [2021-08-21 18:55:55,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:55,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:55,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:55,394 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:55,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:55:56,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:56,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015540627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:56,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:56,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:56,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493843863] [2021-08-21 18:55:56,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:56,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:56,268 INFO L87 Difference]: Start difference. First operand 41781 states and 69895 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:56,527 INFO L93 Difference]: Finished difference Result 44555 states and 75402 transitions. [2021-08-21 18:55:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:56,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:56,610 INFO L225 Difference]: With dead ends: 44555 [2021-08-21 18:55:56,610 INFO L226 Difference]: Without dead ends: 44545 [2021-08-21 18:55:56,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44545 states. [2021-08-21 18:55:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44545 to 41806. [2021-08-21 18:55:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41806 states, 41805 states have (on average 1.6743212534385838) internal successors, (69995), 41805 states have internal predecessors, (69995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41806 states to 41806 states and 69995 transitions. [2021-08-21 18:55:57,355 INFO L78 Accepts]: Start accepts. Automaton has 41806 states and 69995 transitions. Word has length 35 [2021-08-21 18:55:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:57,355 INFO L470 AbstractCegarLoop]: Abstraction has 41806 states and 69995 transitions. [2021-08-21 18:55:57,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 41806 states and 69995 transitions. [2021-08-21 18:55:57,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:57,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:57,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:57,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:57,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 18:55:57,619 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:57,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:57,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1554563615, now seen corresponding path program 2 times [2021-08-21 18:55:57,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:57,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250407983] [2021-08-21 18:55:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:57,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:57,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:57,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250407983] [2021-08-21 18:55:57,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250407983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:57,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043848317] [2021-08-21 18:55:57,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:57,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:57,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:57,665 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:57,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:55:58,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:58,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:55:58,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:58,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043848317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:58,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:58,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:55:58,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192429404] [2021-08-21 18:55:58,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:58,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:58,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:58,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:58,698 INFO L87 Difference]: Start difference. First operand 41806 states and 69995 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:58,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:58,877 INFO L93 Difference]: Finished difference Result 44255 states and 74979 transitions. [2021-08-21 18:55:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:55:58,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:55:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:58,960 INFO L225 Difference]: With dead ends: 44255 [2021-08-21 18:55:58,960 INFO L226 Difference]: Without dead ends: 44245 [2021-08-21 18:55:58,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:59,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44245 states. [2021-08-21 18:55:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44245 to 41811. [2021-08-21 18:55:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41811 states, 41810 states have (on average 1.6748385553695289) internal successors, (70025), 41810 states have internal predecessors, (70025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41811 states to 41811 states and 70025 transitions. [2021-08-21 18:55:59,630 INFO L78 Accepts]: Start accepts. Automaton has 41811 states and 70025 transitions. Word has length 35 [2021-08-21 18:55:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:59,630 INFO L470 AbstractCegarLoop]: Abstraction has 41811 states and 70025 transitions. [2021-08-21 18:55:59,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 41811 states and 70025 transitions. [2021-08-21 18:55:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:59,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:59,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:59,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:59,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 18:55:59,891 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:55:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash -322941595, now seen corresponding path program 1 times [2021-08-21 18:55:59,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:59,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358194594] [2021-08-21 18:55:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:59,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:59,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:59,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358194594] [2021-08-21 18:55:59,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358194594] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:59,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:59,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:55:59,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058868219] [2021-08-21 18:55:59,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:55:59,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:55:59,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:55:59,934 INFO L87 Difference]: Start difference. First operand 41811 states and 70025 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:00,105 INFO L93 Difference]: Finished difference Result 44763 states and 75514 transitions. [2021-08-21 18:56:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:56:00,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:56:00,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:00,193 INFO L225 Difference]: With dead ends: 44763 [2021-08-21 18:56:00,193 INFO L226 Difference]: Without dead ends: 44749 [2021-08-21 18:56:00,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44749 states. [2021-08-21 18:56:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44749 to 41867. [2021-08-21 18:56:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41867 states, 41866 states have (on average 1.67591840634405) internal successors, (70164), 41866 states have internal predecessors, (70164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41867 states to 41867 states and 70164 transitions. [2021-08-21 18:56:01,165 INFO L78 Accepts]: Start accepts. Automaton has 41867 states and 70164 transitions. Word has length 35 [2021-08-21 18:56:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:01,165 INFO L470 AbstractCegarLoop]: Abstraction has 41867 states and 70164 transitions. [2021-08-21 18:56:01,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 41867 states and 70164 transitions. [2021-08-21 18:56:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:01,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:01,228 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:01,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-21 18:56:01,229 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:56:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash 328179301, now seen corresponding path program 1 times [2021-08-21 18:56:01,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:01,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933735339] [2021-08-21 18:56:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:01,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:01,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:01,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933735339] [2021-08-21 18:56:01,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933735339] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:56:01,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:56:01,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:56:01,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963979458] [2021-08-21 18:56:01,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:56:01,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:56:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:01,274 INFO L87 Difference]: Start difference. First operand 41867 states and 70164 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:01,478 INFO L93 Difference]: Finished difference Result 44927 states and 76002 transitions. [2021-08-21 18:56:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:56:01,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:56:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:01,561 INFO L225 Difference]: With dead ends: 44927 [2021-08-21 18:56:01,562 INFO L226 Difference]: Without dead ends: 44913 [2021-08-21 18:56:01,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:01,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44913 states. [2021-08-21 18:56:02,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44913 to 41889. [2021-08-21 18:56:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41889 states, 41888 states have (on average 1.6770674178762415) internal successors, (70249), 41888 states have internal predecessors, (70249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:02,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41889 states to 41889 states and 70249 transitions. [2021-08-21 18:56:02,270 INFO L78 Accepts]: Start accepts. Automaton has 41889 states and 70249 transitions. Word has length 35 [2021-08-21 18:56:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:02,270 INFO L470 AbstractCegarLoop]: Abstraction has 41889 states and 70249 transitions. [2021-08-21 18:56:02,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 41889 states and 70249 transitions. [2021-08-21 18:56:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:02,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:02,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:02,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-21 18:56:02,335 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:56:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:02,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2131861059, now seen corresponding path program 2 times [2021-08-21 18:56:02,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:02,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261201507] [2021-08-21 18:56:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:02,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:02,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:02,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261201507] [2021-08-21 18:56:02,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261201507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:02,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552053183] [2021-08-21 18:56:02,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:02,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:02,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:02,379 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:02,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:56:03,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:03,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:03,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:56:03,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:03,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552053183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:03,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:03,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:56:03,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528403187] [2021-08-21 18:56:03,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:56:03,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:56:03,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:03,479 INFO L87 Difference]: Start difference. First operand 41889 states and 70249 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:03,667 INFO L93 Difference]: Finished difference Result 44707 states and 75759 transitions. [2021-08-21 18:56:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:56:03,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:56:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:03,750 INFO L225 Difference]: With dead ends: 44707 [2021-08-21 18:56:03,750 INFO L226 Difference]: Without dead ends: 44697 [2021-08-21 18:56:03,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44697 states. [2021-08-21 18:56:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44697 to 41919. [2021-08-21 18:56:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41919 states, 41918 states have (on average 1.6783720597356744) internal successors, (70354), 41918 states have internal predecessors, (70354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41919 states to 41919 states and 70354 transitions. [2021-08-21 18:56:04,469 INFO L78 Accepts]: Start accepts. Automaton has 41919 states and 70354 transitions. Word has length 35 [2021-08-21 18:56:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:04,469 INFO L470 AbstractCegarLoop]: Abstraction has 41919 states and 70354 transitions. [2021-08-21 18:56:04,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 41919 states and 70354 transitions. [2021-08-21 18:56:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:04,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:04,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:04,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:04,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:04,871 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:56:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:04,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1125499821, now seen corresponding path program 2 times [2021-08-21 18:56:04,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:04,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286151355] [2021-08-21 18:56:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:04,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:04,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:04,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286151355] [2021-08-21 18:56:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286151355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:04,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546675612] [2021-08-21 18:56:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:04,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:04,923 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:04,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:56:05,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:05,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:05,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:56:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:05,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546675612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:05,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:05,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:56:05,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165104779] [2021-08-21 18:56:05,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:56:05,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:56:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:05,886 INFO L87 Difference]: Start difference. First operand 41919 states and 70354 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:06,151 INFO L93 Difference]: Finished difference Result 44572 states and 75688 transitions. [2021-08-21 18:56:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:56:06,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:56:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:06,237 INFO L225 Difference]: With dead ends: 44572 [2021-08-21 18:56:06,237 INFO L226 Difference]: Without dead ends: 44562 [2021-08-21 18:56:06,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44562 states. [2021-08-21 18:56:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44562 to 41929. [2021-08-21 18:56:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41929 states, 41928 states have (on average 1.6792835336767793) internal successors, (70409), 41928 states have internal predecessors, (70409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41929 states to 41929 states and 70409 transitions. [2021-08-21 18:56:06,958 INFO L78 Accepts]: Start accepts. Automaton has 41929 states and 70409 transitions. Word has length 35 [2021-08-21 18:56:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:06,958 INFO L470 AbstractCegarLoop]: Abstraction has 41929 states and 70409 transitions. [2021-08-21 18:56:06,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 41929 states and 70409 transitions. [2021-08-21 18:56:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:07,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:07,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:07,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:07,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:07,220 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:56:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1786575035, now seen corresponding path program 2 times [2021-08-21 18:56:07,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:07,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103672692] [2021-08-21 18:56:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:07,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:07,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103672692] [2021-08-21 18:56:07,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103672692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168578627] [2021-08-21 18:56:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:07,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:07,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:07,264 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:07,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:56:08,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:08,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:08,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:56:08,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:08,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168578627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:08,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:08,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:56:08,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948229849] [2021-08-21 18:56:08,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:56:08,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:56:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:08,398 INFO L87 Difference]: Start difference. First operand 41929 states and 70409 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:08,570 INFO L93 Difference]: Finished difference Result 44671 states and 75754 transitions. [2021-08-21 18:56:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:56:08,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:56:08,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:08,653 INFO L225 Difference]: With dead ends: 44671 [2021-08-21 18:56:08,654 INFO L226 Difference]: Without dead ends: 44661 [2021-08-21 18:56:08,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:08,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44661 states. [2021-08-21 18:56:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44661 to 41969. [2021-08-21 18:56:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41969 states, 41968 states have (on average 1.6808759054517728) internal successors, (70543), 41968 states have internal predecessors, (70543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41969 states to 41969 states and 70543 transitions. [2021-08-21 18:56:09,328 INFO L78 Accepts]: Start accepts. Automaton has 41969 states and 70543 transitions. Word has length 35 [2021-08-21 18:56:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:09,328 INFO L470 AbstractCegarLoop]: Abstraction has 41969 states and 70543 transitions. [2021-08-21 18:56:09,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 41969 states and 70543 transitions. [2021-08-21 18:56:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:09,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:09,390 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:09,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:09,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:09,591 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:56:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash -975200311, now seen corresponding path program 2 times [2021-08-21 18:56:09,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:09,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902731875] [2021-08-21 18:56:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:09,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:09,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:09,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902731875] [2021-08-21 18:56:09,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902731875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:09,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294058338] [2021-08-21 18:56:09,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:09,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:09,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:09,641 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:09,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:56:10,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:10,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:10,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:56:10,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:10,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294058338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:10,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:10,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:56:10,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650112679] [2021-08-21 18:56:10,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:56:10,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:56:10,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:10,759 INFO L87 Difference]: Start difference. First operand 41969 states and 70543 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:10,932 INFO L93 Difference]: Finished difference Result 44634 states and 75649 transitions. [2021-08-21 18:56:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:56:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:56:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:11,017 INFO L225 Difference]: With dead ends: 44634 [2021-08-21 18:56:11,017 INFO L226 Difference]: Without dead ends: 44624 [2021-08-21 18:56:11,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44624 states. [2021-08-21 18:56:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44624 to 42004. [2021-08-21 18:56:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42004 states, 42003 states have (on average 1.6819750970168796) internal successors, (70648), 42003 states have internal predecessors, (70648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42004 states to 42004 states and 70648 transitions. [2021-08-21 18:56:11,891 INFO L78 Accepts]: Start accepts. Automaton has 42004 states and 70648 transitions. Word has length 35 [2021-08-21 18:56:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:11,891 INFO L470 AbstractCegarLoop]: Abstraction has 42004 states and 70648 transitions. [2021-08-21 18:56:11,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 42004 states and 70648 transitions. [2021-08-21 18:56:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:11,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:11,956 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:11,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:12,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 18:56:12,157 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:56:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1919166251, now seen corresponding path program 1 times [2021-08-21 18:56:12,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:12,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908396297] [2021-08-21 18:56:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:12,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:12,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:12,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908396297] [2021-08-21 18:56:12,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908396297] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:56:12,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:56:12,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:56:12,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386400063] [2021-08-21 18:56:12,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:56:12,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:12,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:56:12,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:12,198 INFO L87 Difference]: Start difference. First operand 42004 states and 70648 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:12,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:12,369 INFO L93 Difference]: Finished difference Result 45222 states and 77193 transitions. [2021-08-21 18:56:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:56:12,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-08-21 18:56:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:12,455 INFO L225 Difference]: With dead ends: 45222 [2021-08-21 18:56:12,455 INFO L226 Difference]: Without dead ends: 45212 [2021-08-21 18:56:12,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:56:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45212 states. [2021-08-21 18:56:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45212 to 42028. [2021-08-21 18:56:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42028 states, 42027 states have (on average 1.6836795393437551) internal successors, (70760), 42027 states have internal predecessors, (70760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42028 states to 42028 states and 70760 transitions. [2021-08-21 18:56:13,164 INFO L78 Accepts]: Start accepts. Automaton has 42028 states and 70760 transitions. Word has length 35 [2021-08-21 18:56:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:13,164 INFO L470 AbstractCegarLoop]: Abstraction has 42028 states and 70760 transitions. [2021-08-21 18:56:13,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:13,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42028 states and 70760 transitions. [2021-08-21 18:56:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:13,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:13,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:13,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-21 18:56:13,223 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 18:56:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:13,223 INFO L82 PathProgramCache]: Analyzing trace with hash 927934277, now seen corresponding path program 2 times [2021-08-21 18:56:13,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:13,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697349587] [2021-08-21 18:56:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:13,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:13,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:13,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697349587] [2021-08-21 18:56:13,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697349587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:13,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407662195] [2021-08-21 18:56:13,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:13,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:13,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:13,268 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:13,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process