/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:36:49,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:36:49,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:36:49,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 00:36:49,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 00:36:49,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 00:36:49,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 00:36:49,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 00:36:49,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 00:36:49,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 00:36:49,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 00:36:49,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 00:36:49,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 00:36:49,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 00:36:49,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 00:36:49,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 00:36:49,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 00:36:49,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 00:36:49,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 00:36:49,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 00:36:49,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 00:36:49,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 00:36:49,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 00:36:49,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 00:36:49,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-11 00:36:49,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-11 00:36:49,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-11 00:36:49,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-11 00:36:49,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-11 00:36:49,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-11 00:36:49,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 00:36:49,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 00:36:49,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 00:36:49,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 00:36:49,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 00:36:49,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 00:36:49,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 00:36:49,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 00:36:49,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 00:36:49,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 00:36:49,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 00:36:49,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-11 00:36:49,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:36:49,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:36:49,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:36:49,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:36:49,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:36:49,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:36:49,630 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:36:49,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:36:49,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:36:49,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:36:49,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:36:49,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:36:49,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:36:49,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:36:49,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:36:49,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:36:49,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:36:49,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:36:49,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:36:49,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:36:49,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:36:49,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:36:49,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:36:49,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:36:49,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:36:49,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:36:49,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:36:49,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:36:49,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:36:49,634 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:36:49,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:36:49,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:36:49,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:36:49,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:36:49,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:36:49,871 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:36:49,872 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:36:49,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl [2021-03-11 00:36:49,873 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl' [2021-03-11 00:36:49,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:36:49,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:36:49,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:36:49,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:36:49,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:36:49,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... [2021-03-11 00:36:49,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... [2021-03-11 00:36:49,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:36:49,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:36:49,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:36:49,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:36:49,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... [2021-03-11 00:36:49,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... [2021-03-11 00:36:49,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... [2021-03-11 00:36:49,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... [2021-03-11 00:36:49,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... [2021-03-11 00:36:49,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... [2021-03-11 00:36:49,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... [2021-03-11 00:36:49,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:36:49,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:36:49,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:36:49,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:36:49,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:36:49,994 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:36:49,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:36:49,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:36:49,994 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:36:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:36:49,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:36:49,995 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:36:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:36:49,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:36:49,995 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:36:50,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:36:50,084 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:36:50,085 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:36:50 BoogieIcfgContainer [2021-03-11 00:36:50,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:36:50,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:36:50,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:36:50,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:36:50,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:36:49" (1/2) ... [2021-03-11 00:36:50,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30839918 and model type easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:36:50, skipping insertion in model container [2021-03-11 00:36:50,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:36:50" (2/2) ... [2021-03-11 00:36:50,099 INFO L111 eAbstractionObserver]: Analyzing ICFG easy11.wvr.bpl [2021-03-11 00:36:50,102 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:36:50,102 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:36:50,109 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:36:50,109 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:36:50,128 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,129 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,129 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,129 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,129 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,129 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,129 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,130 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,130 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,131 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,131 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,131 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,131 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,131 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,131 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,131 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,131 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,132 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,132 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,133 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,135 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 00:36:50,138 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 00:36:50,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 00:36:50,159 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:36:50,159 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:36:50,159 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:36:50,159 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:36:50,159 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:36:50,159 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:36:50,159 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:36:50,159 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:36:50,164 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-03-11 00:36:50,175 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:50,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:50,181 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:50,181 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:50,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1728152339, now seen corresponding path program 1 times [2021-03-11 00:36:50,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:50,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420106490] [2021-03-11 00:36:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:50,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420106490] [2021-03-11 00:36:50,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:50,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:50,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7646911] [2021-03-11 00:36:50,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:50,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:50,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:50,465 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 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 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:50,602 INFO L93 Difference]: Finished difference Result 98 states and 191 transitions. [2021-03-11 00:36:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:50,616 INFO L225 Difference]: With dead ends: 98 [2021-03-11 00:36:50,616 INFO L226 Difference]: Without dead ends: 88 [2021-03-11 00:36:50,617 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-11 00:36:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2021-03-11 00:36:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-03-11 00:36:50,648 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 15 [2021-03-11 00:36:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:50,649 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-03-11 00:36:50,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-03-11 00:36:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:50,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:50,650 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:50,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:36:50,650 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2019667169, now seen corresponding path program 2 times [2021-03-11 00:36:50,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:50,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566414167] [2021-03-11 00:36:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:50,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566414167] [2021-03-11 00:36:50,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:50,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:50,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608713704] [2021-03-11 00:36:50,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:50,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:50,769 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:50,914 INFO L93 Difference]: Finished difference Result 98 states and 190 transitions. [2021-03-11 00:36:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:50,915 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:50,917 INFO L225 Difference]: With dead ends: 98 [2021-03-11 00:36:50,918 INFO L226 Difference]: Without dead ends: 88 [2021-03-11 00:36:50,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-11 00:36:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2021-03-11 00:36:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 127 transitions. [2021-03-11 00:36:50,933 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 127 transitions. Word has length 15 [2021-03-11 00:36:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:50,933 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 127 transitions. [2021-03-11 00:36:50,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 127 transitions. [2021-03-11 00:36:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:50,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:50,935 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:50,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:36:50,936 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:50,936 INFO L82 PathProgramCache]: Analyzing trace with hash 949033841, now seen corresponding path program 3 times [2021-03-11 00:36:50,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:50,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373600507] [2021-03-11 00:36:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:51,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373600507] [2021-03-11 00:36:51,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:51,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:51,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756552535] [2021-03-11 00:36:51,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:51,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:51,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:51,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:51,044 INFO L87 Difference]: Start difference. First operand 66 states and 127 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:51,172 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-03-11 00:36:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:51,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:51,174 INFO L225 Difference]: With dead ends: 89 [2021-03-11 00:36:51,174 INFO L226 Difference]: Without dead ends: 79 [2021-03-11 00:36:51,174 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-03-11 00:36:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-03-11 00:36:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 128 transitions. [2021-03-11 00:36:51,183 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 128 transitions. Word has length 15 [2021-03-11 00:36:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:51,183 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 128 transitions. [2021-03-11 00:36:51,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 128 transitions. [2021-03-11 00:36:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:51,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:51,184 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:51,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 00:36:51,184 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1619078043, now seen corresponding path program 4 times [2021-03-11 00:36:51,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:51,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154416448] [2021-03-11 00:36:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:51,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154416448] [2021-03-11 00:36:51,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:51,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:51,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649153742] [2021-03-11 00:36:51,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:51,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:51,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:51,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:51,288 INFO L87 Difference]: Start difference. First operand 67 states and 128 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:51,422 INFO L93 Difference]: Finished difference Result 88 states and 169 transitions. [2021-03-11 00:36:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:51,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:51,423 INFO L225 Difference]: With dead ends: 88 [2021-03-11 00:36:51,423 INFO L226 Difference]: Without dead ends: 78 [2021-03-11 00:36:51,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-03-11 00:36:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2021-03-11 00:36:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-03-11 00:36:51,426 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 15 [2021-03-11 00:36:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:51,426 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-03-11 00:36:51,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-03-11 00:36:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:51,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:51,426 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:51,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 00:36:51,427 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:51,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:51,427 INFO L82 PathProgramCache]: Analyzing trace with hash 168516007, now seen corresponding path program 5 times [2021-03-11 00:36:51,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:51,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502292945] [2021-03-11 00:36:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:51,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502292945] [2021-03-11 00:36:51,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:51,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:51,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176028267] [2021-03-11 00:36:51,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:51,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:51,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:51,519 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:51,679 INFO L93 Difference]: Finished difference Result 106 states and 211 transitions. [2021-03-11 00:36:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:51,680 INFO L225 Difference]: With dead ends: 106 [2021-03-11 00:36:51,680 INFO L226 Difference]: Without dead ends: 96 [2021-03-11 00:36:51,681 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-03-11 00:36:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-03-11 00:36:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 133 transitions. [2021-03-11 00:36:51,683 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 133 transitions. Word has length 15 [2021-03-11 00:36:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:51,684 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 133 transitions. [2021-03-11 00:36:51,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 133 transitions. [2021-03-11 00:36:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:51,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:51,685 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:51,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 00:36:51,685 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:51,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1157750279, now seen corresponding path program 6 times [2021-03-11 00:36:51,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:51,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273927914] [2021-03-11 00:36:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:51,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273927914] [2021-03-11 00:36:51,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:51,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:51,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330128526] [2021-03-11 00:36:51,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:51,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:51,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:51,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:51,754 INFO L87 Difference]: Start difference. First operand 68 states and 133 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:51,894 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-03-11 00:36:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:51,895 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:51,897 INFO L225 Difference]: With dead ends: 98 [2021-03-11 00:36:51,897 INFO L226 Difference]: Without dead ends: 88 [2021-03-11 00:36:51,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-11 00:36:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-03-11 00:36:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-03-11 00:36:51,900 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-03-11 00:36:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:51,900 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-03-11 00:36:51,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-03-11 00:36:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:51,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:51,901 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:51,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 00:36:51,901 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:51,901 INFO L82 PathProgramCache]: Analyzing trace with hash -487706077, now seen corresponding path program 7 times [2021-03-11 00:36:51,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:51,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537123312] [2021-03-11 00:36:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:51,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537123312] [2021-03-11 00:36:51,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:51,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:51,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108052899] [2021-03-11 00:36:51,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:51,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:51,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:51,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:51,960 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:52,098 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-03-11 00:36:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:52,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:52,099 INFO L225 Difference]: With dead ends: 97 [2021-03-11 00:36:52,099 INFO L226 Difference]: Without dead ends: 87 [2021-03-11 00:36:52,099 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-03-11 00:36:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2021-03-11 00:36:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-03-11 00:36:52,102 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 15 [2021-03-11 00:36:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:52,102 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-03-11 00:36:52,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-03-11 00:36:52,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:52,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:52,103 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:52,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 00:36:52,103 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:52,103 INFO L82 PathProgramCache]: Analyzing trace with hash -82039123, now seen corresponding path program 8 times [2021-03-11 00:36:52,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:52,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604516828] [2021-03-11 00:36:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:52,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604516828] [2021-03-11 00:36:52,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:52,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:52,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322248378] [2021-03-11 00:36:52,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:52,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:52,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:52,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:52,173 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:52,293 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-03-11 00:36:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:52,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:52,294 INFO L225 Difference]: With dead ends: 95 [2021-03-11 00:36:52,294 INFO L226 Difference]: Without dead ends: 85 [2021-03-11 00:36:52,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-03-11 00:36:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-03-11 00:36:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-03-11 00:36:52,297 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-03-11 00:36:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:52,297 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-03-11 00:36:52,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-03-11 00:36:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:52,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:52,298 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:52,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 00:36:52,298 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:52,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:52,298 INFO L82 PathProgramCache]: Analyzing trace with hash 588005079, now seen corresponding path program 9 times [2021-03-11 00:36:52,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:52,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410843701] [2021-03-11 00:36:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:52,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410843701] [2021-03-11 00:36:52,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:52,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:52,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011202232] [2021-03-11 00:36:52,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:52,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:52,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:52,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:52,359 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:52,463 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-03-11 00:36:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:52,464 INFO L225 Difference]: With dead ends: 94 [2021-03-11 00:36:52,464 INFO L226 Difference]: Without dead ends: 84 [2021-03-11 00:36:52,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-11 00:36:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-03-11 00:36:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-03-11 00:36:52,466 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 15 [2021-03-11 00:36:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:52,466 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-03-11 00:36:52,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-03-11 00:36:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:52,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:52,467 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:52,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 00:36:52,467 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2044309529, now seen corresponding path program 10 times [2021-03-11 00:36:52,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:52,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390780649] [2021-03-11 00:36:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:52,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390780649] [2021-03-11 00:36:52,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:52,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:52,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408608368] [2021-03-11 00:36:52,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:52,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:52,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:52,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:52,524 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:52,653 INFO L93 Difference]: Finished difference Result 97 states and 191 transitions. [2021-03-11 00:36:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:52,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:52,654 INFO L225 Difference]: With dead ends: 97 [2021-03-11 00:36:52,654 INFO L226 Difference]: Without dead ends: 88 [2021-03-11 00:36:52,654 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-11 00:36:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-03-11 00:36:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 69 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 135 transitions. [2021-03-11 00:36:52,656 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 135 transitions. Word has length 15 [2021-03-11 00:36:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:52,656 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 135 transitions. [2021-03-11 00:36:52,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 135 transitions. [2021-03-11 00:36:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:52,657 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:52,657 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:52,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 00:36:52,657 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1160181413, now seen corresponding path program 11 times [2021-03-11 00:36:52,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:52,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79775671] [2021-03-11 00:36:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:52,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79775671] [2021-03-11 00:36:52,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:52,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:52,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731119788] [2021-03-11 00:36:52,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:52,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:52,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:52,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:52,729 INFO L87 Difference]: Start difference. First operand 70 states and 135 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:52,864 INFO L93 Difference]: Finished difference Result 110 states and 221 transitions. [2021-03-11 00:36:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:52,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:52,865 INFO L225 Difference]: With dead ends: 110 [2021-03-11 00:36:52,865 INFO L226 Difference]: Without dead ends: 100 [2021-03-11 00:36:52,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-03-11 00:36:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-03-11 00:36:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-03-11 00:36:52,868 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 15 [2021-03-11 00:36:52,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:52,868 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-03-11 00:36:52,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:52,868 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-03-11 00:36:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:52,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:52,869 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:52,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 00:36:52,869 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1808519597, now seen corresponding path program 12 times [2021-03-11 00:36:52,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:52,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465458528] [2021-03-11 00:36:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:52,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465458528] [2021-03-11 00:36:52,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:52,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247811545] [2021-03-11 00:36:52,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:52,932 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:53,072 INFO L93 Difference]: Finished difference Result 102 states and 205 transitions. [2021-03-11 00:36:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:53,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:53,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:53,073 INFO L225 Difference]: With dead ends: 102 [2021-03-11 00:36:53,073 INFO L226 Difference]: Without dead ends: 92 [2021-03-11 00:36:53,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-11 00:36:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-03-11 00:36:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-03-11 00:36:53,075 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-03-11 00:36:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:53,075 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-03-11 00:36:53,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-03-11 00:36:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:53,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:53,076 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:53,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 00:36:53,076 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1816403497, now seen corresponding path program 13 times [2021-03-11 00:36:53,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:53,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798861581] [2021-03-11 00:36:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:53,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798861581] [2021-03-11 00:36:53,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:53,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:53,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630077728] [2021-03-11 00:36:53,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:53,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:53,133 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:53,250 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-03-11 00:36:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:53,251 INFO L225 Difference]: With dead ends: 101 [2021-03-11 00:36:53,251 INFO L226 Difference]: Without dead ends: 91 [2021-03-11 00:36:53,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-11 00:36:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-03-11 00:36:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-03-11 00:36:53,254 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 15 [2021-03-11 00:36:53,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:53,254 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-03-11 00:36:53,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,254 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-03-11 00:36:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:53,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:53,254 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:53,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-11 00:36:53,254 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:53,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1410736543, now seen corresponding path program 14 times [2021-03-11 00:36:53,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:53,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405568069] [2021-03-11 00:36:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:53,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405568069] [2021-03-11 00:36:53,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:53,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:53,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021117585] [2021-03-11 00:36:53,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:53,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:53,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:53,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:53,331 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:53,439 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-03-11 00:36:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:53,440 INFO L225 Difference]: With dead ends: 104 [2021-03-11 00:36:53,440 INFO L226 Difference]: Without dead ends: 94 [2021-03-11 00:36:53,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-11 00:36:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-03-11 00:36:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-03-11 00:36:53,444 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-03-11 00:36:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:53,444 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-03-11 00:36:53,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-03-11 00:36:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:53,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:53,444 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:53,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-11 00:36:53,445 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash -740692341, now seen corresponding path program 15 times [2021-03-11 00:36:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:53,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370483127] [2021-03-11 00:36:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:53,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370483127] [2021-03-11 00:36:53,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:53,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:53,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452988185] [2021-03-11 00:36:53,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:53,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:53,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:53,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:53,504 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:53,607 INFO L93 Difference]: Finished difference Result 103 states and 206 transitions. [2021-03-11 00:36:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:53,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:53,608 INFO L225 Difference]: With dead ends: 103 [2021-03-11 00:36:53,608 INFO L226 Difference]: Without dead ends: 93 [2021-03-11 00:36:53,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:53,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-03-11 00:36:53,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-03-11 00:36:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 144 transitions. [2021-03-11 00:36:53,610 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 144 transitions. Word has length 15 [2021-03-11 00:36:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:53,610 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 144 transitions. [2021-03-11 00:36:53,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 144 transitions. [2021-03-11 00:36:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:53,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:53,610 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:53,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-11 00:36:53,610 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:53,611 INFO L82 PathProgramCache]: Analyzing trace with hash 921960347, now seen corresponding path program 16 times [2021-03-11 00:36:53,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:53,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564749207] [2021-03-11 00:36:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:53,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564749207] [2021-03-11 00:36:53,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:53,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:53,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463728132] [2021-03-11 00:36:53,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:53,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:53,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:53,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:53,665 INFO L87 Difference]: Start difference. First operand 73 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:53,801 INFO L93 Difference]: Finished difference Result 106 states and 212 transitions. [2021-03-11 00:36:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:53,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:53,802 INFO L225 Difference]: With dead ends: 106 [2021-03-11 00:36:53,802 INFO L226 Difference]: Without dead ends: 97 [2021-03-11 00:36:53,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-03-11 00:36:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2021-03-11 00:36:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-03-11 00:36:53,804 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 15 [2021-03-11 00:36:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:53,804 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-03-11 00:36:53,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-03-11 00:36:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:53,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:53,805 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:53,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-11 00:36:53,805 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:53,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1329337487, now seen corresponding path program 17 times [2021-03-11 00:36:53,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:53,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256376761] [2021-03-11 00:36:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:53,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256376761] [2021-03-11 00:36:53,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:53,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068749453] [2021-03-11 00:36:53,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:53,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:53,854 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:53,959 INFO L93 Difference]: Finished difference Result 95 states and 186 transitions. [2021-03-11 00:36:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:53,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:53,960 INFO L225 Difference]: With dead ends: 95 [2021-03-11 00:36:53,960 INFO L226 Difference]: Without dead ends: 85 [2021-03-11 00:36:53,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-03-11 00:36:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2021-03-11 00:36:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2021-03-11 00:36:53,962 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 15 [2021-03-11 00:36:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:53,962 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2021-03-11 00:36:53,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2021-03-11 00:36:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:53,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:53,962 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:53,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-11 00:36:53,963 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:53,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:53,963 INFO L82 PathProgramCache]: Analyzing trace with hash -659293285, now seen corresponding path program 18 times [2021-03-11 00:36:53,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:53,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160560872] [2021-03-11 00:36:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:54,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160560872] [2021-03-11 00:36:54,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:54,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:54,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041598586] [2021-03-11 00:36:54,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:54,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:54,013 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:54,131 INFO L93 Difference]: Finished difference Result 94 states and 183 transitions. [2021-03-11 00:36:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:54,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:54,132 INFO L225 Difference]: With dead ends: 94 [2021-03-11 00:36:54,132 INFO L226 Difference]: Without dead ends: 84 [2021-03-11 00:36:54,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:54,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-11 00:36:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-03-11 00:36:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-03-11 00:36:54,137 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 15 [2021-03-11 00:36:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:54,137 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-03-11 00:36:54,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-03-11 00:36:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:54,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:54,137 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:54,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-11 00:36:54,137 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:54,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:54,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1003359403, now seen corresponding path program 19 times [2021-03-11 00:36:54,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:54,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937638097] [2021-03-11 00:36:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:54,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937638097] [2021-03-11 00:36:54,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:54,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:54,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513592905] [2021-03-11 00:36:54,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:54,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:54,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:54,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:54,202 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:54,334 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-03-11 00:36:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:54,335 INFO L225 Difference]: With dead ends: 97 [2021-03-11 00:36:54,335 INFO L226 Difference]: Without dead ends: 88 [2021-03-11 00:36:54,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-11 00:36:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-03-11 00:36:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.971830985915493) internal successors, (140), 71 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 140 transitions. [2021-03-11 00:36:54,340 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 140 transitions. Word has length 15 [2021-03-11 00:36:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:54,340 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 140 transitions. [2021-03-11 00:36:54,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 140 transitions. [2021-03-11 00:36:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:36:54,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:54,342 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:54,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-11 00:36:54,342 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:54,342 INFO L82 PathProgramCache]: Analyzing trace with hash -67100201, now seen corresponding path program 20 times [2021-03-11 00:36:54,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:54,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936232118] [2021-03-11 00:36:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:54,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936232118] [2021-03-11 00:36:54,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:54,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-11 00:36:54,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124001810] [2021-03-11 00:36:54,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:36:54,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:54,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:36:54,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:54,395 INFO L87 Difference]: Start difference. First operand 72 states and 140 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:54,506 INFO L93 Difference]: Finished difference Result 103 states and 199 transitions. [2021-03-11 00:36:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:36:54,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:36:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:54,507 INFO L225 Difference]: With dead ends: 103 [2021-03-11 00:36:54,507 INFO L226 Difference]: Without dead ends: 94 [2021-03-11 00:36:54,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-11 00:36:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-03-11 00:36:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 143 transitions. [2021-03-11 00:36:54,509 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 143 transitions. Word has length 15 [2021-03-11 00:36:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:54,509 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 143 transitions. [2021-03-11 00:36:54,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 143 transitions. [2021-03-11 00:36:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:54,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:54,510 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:54,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-11 00:36:54,510 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:54,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:54,510 INFO L82 PathProgramCache]: Analyzing trace with hash -55242805, now seen corresponding path program 1 times [2021-03-11 00:36:54,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:54,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44549361] [2021-03-11 00:36:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:54,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44549361] [2021-03-11 00:36:54,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770710827] [2021-03-11 00:36:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:36:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:54,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:54,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-11 00:36:54,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890068769] [2021-03-11 00:36:54,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:54,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:54,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:54,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:54,600 INFO L87 Difference]: Start difference. First operand 74 states and 143 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:54,652 INFO L93 Difference]: Finished difference Result 108 states and 208 transitions. [2021-03-11 00:36:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:36:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:54,653 INFO L225 Difference]: With dead ends: 108 [2021-03-11 00:36:54,653 INFO L226 Difference]: Without dead ends: 108 [2021-03-11 00:36:54,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:36:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-11 00:36:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 69. [2021-03-11 00:36:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 136 transitions. [2021-03-11 00:36:54,655 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 136 transitions. Word has length 17 [2021-03-11 00:36:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:54,655 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 136 transitions. [2021-03-11 00:36:54,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,656 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 136 transitions. [2021-03-11 00:36:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:54,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:54,656 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:54,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-11 00:36:54,872 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:54,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1323979185, now seen corresponding path program 1 times [2021-03-11 00:36:54,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:54,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491646620] [2021-03-11 00:36:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:54,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491646620] [2021-03-11 00:36:54,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:54,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:36:54,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261761226] [2021-03-11 00:36:54,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:54,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:54,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:54,886 INFO L87 Difference]: Start difference. First operand 69 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:54,935 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-03-11 00:36:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:36:54,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:54,935 INFO L225 Difference]: With dead ends: 120 [2021-03-11 00:36:54,935 INFO L226 Difference]: Without dead ends: 109 [2021-03-11 00:36:54,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:36:54,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-11 00:36:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 69. [2021-03-11 00:36:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-03-11 00:36:54,941 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 17 [2021-03-11 00:36:54,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:54,941 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-03-11 00:36:54,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-03-11 00:36:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:54,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:54,941 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:54,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-11 00:36:54,941 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:54,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1212131849, now seen corresponding path program 2 times [2021-03-11 00:36:54,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:54,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550392123] [2021-03-11 00:36:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:54,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550392123] [2021-03-11 00:36:54,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736101577] [2021-03-11 00:36:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:36:54,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:36:54,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:36:54,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:55,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:55,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-11 00:36:55,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900252163] [2021-03-11 00:36:55,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:55,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:55,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:55,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:55,032 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:55,079 INFO L93 Difference]: Finished difference Result 116 states and 219 transitions. [2021-03-11 00:36:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:36:55,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:55,079 INFO L225 Difference]: With dead ends: 116 [2021-03-11 00:36:55,080 INFO L226 Difference]: Without dead ends: 116 [2021-03-11 00:36:55,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:36:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-11 00:36:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 70. [2021-03-11 00:36:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0) internal successors, (138), 69 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 138 transitions. [2021-03-11 00:36:55,084 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 138 transitions. Word has length 17 [2021-03-11 00:36:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:55,084 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 138 transitions. [2021-03-11 00:36:55,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 138 transitions. [2021-03-11 00:36:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:55,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:55,084 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:55,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-11 00:36:55,291 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:55,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:55,291 INFO L82 PathProgramCache]: Analyzing trace with hash 308167817, now seen corresponding path program 2 times [2021-03-11 00:36:55,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:55,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464091485] [2021-03-11 00:36:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:55,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464091485] [2021-03-11 00:36:55,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:55,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:36:55,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784198043] [2021-03-11 00:36:55,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:55,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:55,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:55,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:55,309 INFO L87 Difference]: Start difference. First operand 70 states and 138 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:55,363 INFO L93 Difference]: Finished difference Result 153 states and 286 transitions. [2021-03-11 00:36:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:36:55,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:55,364 INFO L225 Difference]: With dead ends: 153 [2021-03-11 00:36:55,364 INFO L226 Difference]: Without dead ends: 149 [2021-03-11 00:36:55,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-11 00:36:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 80. [2021-03-11 00:36:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-03-11 00:36:55,372 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 17 [2021-03-11 00:36:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:55,372 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-03-11 00:36:55,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-03-11 00:36:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:55,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:55,373 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:55,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-11 00:36:55,373 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:55,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1656584079, now seen corresponding path program 3 times [2021-03-11 00:36:55,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:55,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139211630] [2021-03-11 00:36:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:55,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139211630] [2021-03-11 00:36:55,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:55,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:36:55,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556198455] [2021-03-11 00:36:55,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:55,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:55,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:55,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:55,389 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:55,442 INFO L93 Difference]: Finished difference Result 126 states and 243 transitions. [2021-03-11 00:36:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:36:55,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:55,444 INFO L225 Difference]: With dead ends: 126 [2021-03-11 00:36:55,444 INFO L226 Difference]: Without dead ends: 126 [2021-03-11 00:36:55,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-11 00:36:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-03-11 00:36:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-03-11 00:36:55,446 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-03-11 00:36:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:55,446 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-03-11 00:36:55,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-03-11 00:36:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:55,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:55,446 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:55,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-11 00:36:55,446 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:55,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2146658699, now seen corresponding path program 3 times [2021-03-11 00:36:55,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:55,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204497987] [2021-03-11 00:36:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:55,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204497987] [2021-03-11 00:36:55,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:55,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:36:55,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787203794] [2021-03-11 00:36:55,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:55,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:55,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:55,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:55,467 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:55,512 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2021-03-11 00:36:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:36:55,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:55,513 INFO L225 Difference]: With dead ends: 86 [2021-03-11 00:36:55,513 INFO L226 Difference]: Without dead ends: 83 [2021-03-11 00:36:55,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:36:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-11 00:36:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-03-11 00:36:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-03-11 00:36:55,518 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-03-11 00:36:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:55,518 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-03-11 00:36:55,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-03-11 00:36:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:55,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:55,519 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:55,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-11 00:36:55,519 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash -60801859, now seen corresponding path program 4 times [2021-03-11 00:36:55,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:55,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204123453] [2021-03-11 00:36:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:55,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204123453] [2021-03-11 00:36:55,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559825956] [2021-03-11 00:36:55,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:36:55,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:36:55,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:55,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:36:55,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:55,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:55,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-11 00:36:55,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600975063] [2021-03-11 00:36:55,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:55,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:55,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:55,585 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:55,640 INFO L93 Difference]: Finished difference Result 124 states and 233 transitions. [2021-03-11 00:36:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:36:55,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:55,641 INFO L225 Difference]: With dead ends: 124 [2021-03-11 00:36:55,641 INFO L226 Difference]: Without dead ends: 124 [2021-03-11 00:36:55,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-03-11 00:36:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 72. [2021-03-11 00:36:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-03-11 00:36:55,643 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-03-11 00:36:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:55,643 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-03-11 00:36:55,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-03-11 00:36:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:55,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:55,644 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:55,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-11 00:36:55,858 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash -964765891, now seen corresponding path program 4 times [2021-03-11 00:36:55,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:55,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793384664] [2021-03-11 00:36:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:55,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793384664] [2021-03-11 00:36:55,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:55,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:36:55,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81241876] [2021-03-11 00:36:55,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:55,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:55,873 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:55,919 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-03-11 00:36:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:36:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:55,920 INFO L225 Difference]: With dead ends: 113 [2021-03-11 00:36:55,920 INFO L226 Difference]: Without dead ends: 109 [2021-03-11 00:36:55,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:36:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-11 00:36:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-03-11 00:36:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-03-11 00:36:55,922 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-03-11 00:36:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:55,922 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-03-11 00:36:55,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-03-11 00:36:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:55,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:55,922 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:55,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-03-11 00:36:55,922 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:55,923 INFO L82 PathProgramCache]: Analyzing trace with hash 383650371, now seen corresponding path program 5 times [2021-03-11 00:36:55,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:55,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925433332] [2021-03-11 00:36:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:55,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925433332] [2021-03-11 00:36:55,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:55,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:36:55,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079181489] [2021-03-11 00:36:55,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:55,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:55,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:55,938 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:55,989 INFO L93 Difference]: Finished difference Result 114 states and 216 transitions. [2021-03-11 00:36:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:36:55,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:55,989 INFO L225 Difference]: With dead ends: 114 [2021-03-11 00:36:55,989 INFO L226 Difference]: Without dead ends: 114 [2021-03-11 00:36:55,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:36:55,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-11 00:36:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2021-03-11 00:36:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-03-11 00:36:55,993 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-03-11 00:36:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:55,993 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-03-11 00:36:55,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-03-11 00:36:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:55,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:55,993 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:55,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-03-11 00:36:55,994 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash 873724991, now seen corresponding path program 5 times [2021-03-11 00:36:55,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:55,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020242832] [2021-03-11 00:36:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020242832] [2021-03-11 00:36:56,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:56,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:36:56,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014436564] [2021-03-11 00:36:56,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:56,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:56,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:56,009 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:56,061 INFO L93 Difference]: Finished difference Result 139 states and 260 transitions. [2021-03-11 00:36:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:36:56,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:56,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:56,062 INFO L225 Difference]: With dead ends: 139 [2021-03-11 00:36:56,062 INFO L226 Difference]: Without dead ends: 136 [2021-03-11 00:36:56,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:36:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-11 00:36:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2021-03-11 00:36:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.975) internal successors, (158), 80 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 158 transitions. [2021-03-11 00:36:56,065 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 158 transitions. Word has length 17 [2021-03-11 00:36:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:56,065 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 158 transitions. [2021-03-11 00:36:56,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 158 transitions. [2021-03-11 00:36:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:56,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:56,065 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:56,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-03-11 00:36:56,065 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1721217585, now seen corresponding path program 6 times [2021-03-11 00:36:56,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:56,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049367528] [2021-03-11 00:36:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:56,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049367528] [2021-03-11 00:36:56,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:56,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:36:56,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307040204] [2021-03-11 00:36:56,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:56,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:56,082 INFO L87 Difference]: Start difference. First operand 81 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:56,123 INFO L93 Difference]: Finished difference Result 105 states and 195 transitions. [2021-03-11 00:36:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:36:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:56,124 INFO L225 Difference]: With dead ends: 105 [2021-03-11 00:36:56,124 INFO L226 Difference]: Without dead ends: 105 [2021-03-11 00:36:56,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:36:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-11 00:36:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-03-11 00:36:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-03-11 00:36:56,126 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 17 [2021-03-11 00:36:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:56,126 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-03-11 00:36:56,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-03-11 00:36:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:36:56,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:56,126 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:56,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-03-11 00:36:56,127 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1788806479, now seen corresponding path program 6 times [2021-03-11 00:36:56,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:56,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44062379] [2021-03-11 00:36:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:56,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44062379] [2021-03-11 00:36:56,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:36:56,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:36:56,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141384867] [2021-03-11 00:36:56,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:36:56,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:56,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:36:56,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:36:56,140 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:56,177 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-03-11 00:36:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:36:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:36:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:56,177 INFO L225 Difference]: With dead ends: 82 [2021-03-11 00:36:56,177 INFO L226 Difference]: Without dead ends: 76 [2021-03-11 00:36:56,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:36:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-03-11 00:36:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-03-11 00:36:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 67 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 131 transitions. [2021-03-11 00:36:56,181 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 131 transitions. Word has length 17 [2021-03-11 00:36:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:56,181 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 131 transitions. [2021-03-11 00:36:56,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 131 transitions. [2021-03-11 00:36:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:36:56,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:56,181 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:56,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-03-11 00:36:56,181 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash 24314285, now seen corresponding path program 1 times [2021-03-11 00:36:56,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:56,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849456685] [2021-03-11 00:36:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:56,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849456685] [2021-03-11 00:36:56,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304922963] [2021-03-11 00:36:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:36:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:56,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:36:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:56,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:56,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:36:56,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281597698] [2021-03-11 00:36:56,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:36:56,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:56,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:36:56,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:36:56,434 INFO L87 Difference]: Start difference. First operand 68 states and 131 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:56,605 INFO L93 Difference]: Finished difference Result 87 states and 162 transitions. [2021-03-11 00:36:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:36:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:36:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:56,606 INFO L225 Difference]: With dead ends: 87 [2021-03-11 00:36:56,606 INFO L226 Difference]: Without dead ends: 60 [2021-03-11 00:36:56,606 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:36:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-03-11 00:36:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-03-11 00:36:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2021-03-11 00:36:56,607 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 19 [2021-03-11 00:36:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:56,607 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2021-03-11 00:36:56,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2021-03-11 00:36:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:36:56,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:56,608 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:56,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:56,824 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:56,824 INFO L82 PathProgramCache]: Analyzing trace with hash -640382641, now seen corresponding path program 2 times [2021-03-11 00:36:56,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:56,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331070487] [2021-03-11 00:36:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:56,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331070487] [2021-03-11 00:36:56,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129773663] [2021-03-11 00:36:56,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:56,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:36:56,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:36:56,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:57,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:57,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:36:57,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192292414] [2021-03-11 00:36:57,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:36:57,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:57,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:36:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:36:57,092 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:57,288 INFO L93 Difference]: Finished difference Result 78 states and 138 transitions. [2021-03-11 00:36:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:36:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:36:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:57,288 INFO L225 Difference]: With dead ends: 78 [2021-03-11 00:36:57,288 INFO L226 Difference]: Without dead ends: 62 [2021-03-11 00:36:57,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:36:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-03-11 00:36:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-03-11 00:36:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 113 transitions. [2021-03-11 00:36:57,290 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 113 transitions. Word has length 19 [2021-03-11 00:36:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:57,290 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 113 transitions. [2021-03-11 00:36:57,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 113 transitions. [2021-03-11 00:36:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:36:57,290 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:57,290 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:57,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-11 00:36:57,491 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash 111018267, now seen corresponding path program 3 times [2021-03-11 00:36:57,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:57,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167223167] [2021-03-11 00:36:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:57,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167223167] [2021-03-11 00:36:57,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741754230] [2021-03-11 00:36:57,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:57,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:36:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:57,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:36:57,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:57,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:57,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:36:57,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589390907] [2021-03-11 00:36:57,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:36:57,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:57,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:36:57,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:36:57,758 INFO L87 Difference]: Start difference. First operand 61 states and 113 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:57,902 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-03-11 00:36:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:36:57,902 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:36:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:57,903 INFO L225 Difference]: With dead ends: 80 [2021-03-11 00:36:57,903 INFO L226 Difference]: Without dead ends: 67 [2021-03-11 00:36:57,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:36:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-03-11 00:36:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-03-11 00:36:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-03-11 00:36:57,904 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 19 [2021-03-11 00:36:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:57,904 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-03-11 00:36:57,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-03-11 00:36:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:36:57,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:57,905 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:58,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:58,105 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:58,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1215248019, now seen corresponding path program 4 times [2021-03-11 00:36:58,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:58,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476664464] [2021-03-11 00:36:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:58,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476664464] [2021-03-11 00:36:58,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46427810] [2021-03-11 00:36:58,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:58,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:36:58,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:58,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:36:58,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:58,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:58,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:36:58,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878452248] [2021-03-11 00:36:58,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:36:58,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:58,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:36:58,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:36:58,390 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:58,761 INFO L93 Difference]: Finished difference Result 109 states and 201 transitions. [2021-03-11 00:36:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:36:58,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:36:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:58,761 INFO L225 Difference]: With dead ends: 109 [2021-03-11 00:36:58,761 INFO L226 Difference]: Without dead ends: 99 [2021-03-11 00:36:58,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:36:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-03-11 00:36:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-03-11 00:36:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 161 transitions. [2021-03-11 00:36:58,763 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 161 transitions. Word has length 19 [2021-03-11 00:36:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:58,764 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 161 transitions. [2021-03-11 00:36:58,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 161 transitions. [2021-03-11 00:36:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:36:58,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:58,764 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:58,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-11 00:36:58,964 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:58,965 INFO L82 PathProgramCache]: Analyzing trace with hash -545203817, now seen corresponding path program 5 times [2021-03-11 00:36:58,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:58,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044093547] [2021-03-11 00:36:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:59,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044093547] [2021-03-11 00:36:59,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638161603] [2021-03-11 00:36:59,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:59,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:36:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:36:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:59,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:36:59,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-03-11 00:36:59,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819496244] [2021-03-11 00:36:59,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:36:59,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:36:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:36:59,231 INFO L87 Difference]: Start difference. First operand 86 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:59,288 INFO L93 Difference]: Finished difference Result 96 states and 174 transitions. [2021-03-11 00:36:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:36:59,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-03-11 00:36:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:59,288 INFO L225 Difference]: With dead ends: 96 [2021-03-11 00:36:59,288 INFO L226 Difference]: Without dead ends: 78 [2021-03-11 00:36:59,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:36:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-03-11 00:36:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-03-11 00:36:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9210526315789473) internal successors, (146), 76 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 146 transitions. [2021-03-11 00:36:59,291 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 146 transitions. Word has length 19 [2021-03-11 00:36:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:59,291 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 146 transitions. [2021-03-11 00:36:59,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 146 transitions. [2021-03-11 00:36:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:36:59,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:59,291 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:59,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-11 00:36:59,495 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1290089747, now seen corresponding path program 6 times [2021-03-11 00:36:59,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:59,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108800317] [2021-03-11 00:36:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:59,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108800317] [2021-03-11 00:36:59,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281085167] [2021-03-11 00:36:59,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:59,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:36:59,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:36:59,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:59,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:59,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:36:59,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447623486] [2021-03-11 00:36:59,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:36:59,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:59,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:36:59,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:36:59,731 INFO L87 Difference]: Start difference. First operand 77 states and 146 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:59,991 INFO L93 Difference]: Finished difference Result 108 states and 202 transitions. [2021-03-11 00:36:59,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:36:59,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:36:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:59,991 INFO L225 Difference]: With dead ends: 108 [2021-03-11 00:36:59,991 INFO L226 Difference]: Without dead ends: 92 [2021-03-11 00:36:59,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:36:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-11 00:36:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-03-11 00:36:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 82 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 158 transitions. [2021-03-11 00:36:59,993 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 158 transitions. Word has length 19 [2021-03-11 00:36:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:59,993 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 158 transitions. [2021-03-11 00:36:59,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 158 transitions. [2021-03-11 00:36:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:36:59,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:59,994 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:00,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-11 00:37:00,199 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash -538688839, now seen corresponding path program 7 times [2021-03-11 00:37:00,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:00,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340490465] [2021-03-11 00:37:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:00,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340490465] [2021-03-11 00:37:00,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499228618] [2021-03-11 00:37:00,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:00,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:00,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:00,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:00,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403024756] [2021-03-11 00:37:00,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:00,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:00,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:00,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:00,471 INFO L87 Difference]: Start difference. First operand 83 states and 158 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:00,696 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-03-11 00:37:00,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:00,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:00,697 INFO L225 Difference]: With dead ends: 113 [2021-03-11 00:37:00,697 INFO L226 Difference]: Without dead ends: 100 [2021-03-11 00:37:00,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:37:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-03-11 00:37:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2021-03-11 00:37:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 84 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 161 transitions. [2021-03-11 00:37:00,699 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 161 transitions. Word has length 19 [2021-03-11 00:37:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:00,699 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 161 transitions. [2021-03-11 00:37:00,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 161 transitions. [2021-03-11 00:37:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:00,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:00,699 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:00,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-11 00:37:00,914 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:00,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:00,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1864955125, now seen corresponding path program 8 times [2021-03-11 00:37:00,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:00,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870800743] [2021-03-11 00:37:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:01,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870800743] [2021-03-11 00:37:01,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227332095] [2021-03-11 00:37:01,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:01,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:01,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:01,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:37:01,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-03-11 00:37:01,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654159868] [2021-03-11 00:37:01,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:01,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:01,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:01,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:01,199 INFO L87 Difference]: Start difference. First operand 85 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:01,291 INFO L93 Difference]: Finished difference Result 101 states and 183 transitions. [2021-03-11 00:37:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:37:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:01,292 INFO L225 Difference]: With dead ends: 101 [2021-03-11 00:37:01,292 INFO L226 Difference]: Without dead ends: 88 [2021-03-11 00:37:01,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-11 00:37:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-03-11 00:37:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 83 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 159 transitions. [2021-03-11 00:37:01,294 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 159 transitions. Word has length 19 [2021-03-11 00:37:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:01,294 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 159 transitions. [2021-03-11 00:37:01,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 159 transitions. [2021-03-11 00:37:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:01,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:01,295 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:01,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-11 00:37:01,510 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1194910923, now seen corresponding path program 9 times [2021-03-11 00:37:01,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:01,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624865451] [2021-03-11 00:37:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:01,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624865451] [2021-03-11 00:37:01,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530633259] [2021-03-11 00:37:01,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:01,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:37:01,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:01,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:01,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:01,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:37:01,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-03-11 00:37:01,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784798943] [2021-03-11 00:37:01,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:01,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:01,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:01,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:01,768 INFO L87 Difference]: Start difference. First operand 84 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:01,855 INFO L93 Difference]: Finished difference Result 93 states and 170 transitions. [2021-03-11 00:37:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:37:01,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:01,856 INFO L225 Difference]: With dead ends: 93 [2021-03-11 00:37:01,856 INFO L226 Difference]: Without dead ends: 81 [2021-03-11 00:37:01,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-11 00:37:01,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-03-11 00:37:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.925) internal successors, (154), 80 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 154 transitions. [2021-03-11 00:37:01,858 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 154 transitions. Word has length 19 [2021-03-11 00:37:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:01,858 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 154 transitions. [2021-03-11 00:37:01,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 154 transitions. [2021-03-11 00:37:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:01,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:01,858 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:02,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:02,071 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:02,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1143148071, now seen corresponding path program 10 times [2021-03-11 00:37:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:02,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838604327] [2021-03-11 00:37:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:02,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838604327] [2021-03-11 00:37:02,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701352385] [2021-03-11 00:37:02,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:02,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:02,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:02,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:02,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:02,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:02,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7493569] [2021-03-11 00:37:02,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:02,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:02,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:02,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:02,308 INFO L87 Difference]: Start difference. First operand 81 states and 154 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:03,109 INFO L93 Difference]: Finished difference Result 176 states and 352 transitions. [2021-03-11 00:37:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:37:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:03,110 INFO L225 Difference]: With dead ends: 176 [2021-03-11 00:37:03,110 INFO L226 Difference]: Without dead ends: 159 [2021-03-11 00:37:03,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=566, Invalid=1984, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:37:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-11 00:37:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2021-03-11 00:37:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 107 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 218 transitions. [2021-03-11 00:37:03,113 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 218 transitions. Word has length 19 [2021-03-11 00:37:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:03,113 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 218 transitions. [2021-03-11 00:37:03,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 218 transitions. [2021-03-11 00:37:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:03,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:03,113 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:03,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-03-11 00:37:03,328 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:03,328 INFO L82 PathProgramCache]: Analyzing trace with hash 486925987, now seen corresponding path program 11 times [2021-03-11 00:37:03,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:03,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650704353] [2021-03-11 00:37:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:03,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650704353] [2021-03-11 00:37:03,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174111703] [2021-03-11 00:37:03,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:03,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:03,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:03,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:03,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:03,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:37:03,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-03-11 00:37:03,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118564735] [2021-03-11 00:37:03,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:03,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:03,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:03,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:03,575 INFO L87 Difference]: Start difference. First operand 108 states and 218 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:03,689 INFO L93 Difference]: Finished difference Result 138 states and 273 transitions. [2021-03-11 00:37:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:03,689 INFO L225 Difference]: With dead ends: 138 [2021-03-11 00:37:03,689 INFO L226 Difference]: Without dead ends: 127 [2021-03-11 00:37:03,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 215.0ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:37:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-11 00:37:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2021-03-11 00:37:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-03-11 00:37:03,692 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-03-11 00:37:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:03,692 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-03-11 00:37:03,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-03-11 00:37:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:03,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:03,692 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:03,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:03,906 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1562637143, now seen corresponding path program 12 times [2021-03-11 00:37:03,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:03,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469049858] [2021-03-11 00:37:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:03,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469049858] [2021-03-11 00:37:03,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006761230] [2021-03-11 00:37:03,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:03,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:37:03,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:03,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:03,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:04,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:37:04,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-03-11 00:37:04,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352612484] [2021-03-11 00:37:04,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:04,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:04,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:04,138 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:04,261 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-03-11 00:37:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:04,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:04,262 INFO L225 Difference]: With dead ends: 128 [2021-03-11 00:37:04,262 INFO L226 Difference]: Without dead ends: 118 [2021-03-11 00:37:04,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:37:04,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-11 00:37:04,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2021-03-11 00:37:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-03-11 00:37:04,264 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-03-11 00:37:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:04,264 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-03-11 00:37:04,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:04,264 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-03-11 00:37:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:04,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:04,265 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:04,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-11 00:37:04,475 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1069677465, now seen corresponding path program 13 times [2021-03-11 00:37:04,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:04,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785951900] [2021-03-11 00:37:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:04,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785951900] [2021-03-11 00:37:04,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817627429] [2021-03-11 00:37:04,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:04,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:04,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:04,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:04,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075685259] [2021-03-11 00:37:04,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:04,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:04,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:04,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:04,719 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:04,967 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-03-11 00:37:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:37:04,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:04,968 INFO L225 Difference]: With dead ends: 128 [2021-03-11 00:37:04,968 INFO L226 Difference]: Without dead ends: 119 [2021-03-11 00:37:04,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:37:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-11 00:37:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-03-11 00:37:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-03-11 00:37:04,970 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-03-11 00:37:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:04,970 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-03-11 00:37:04,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-03-11 00:37:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:04,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:04,970 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:05,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:05,183 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:05,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1532453059, now seen corresponding path program 14 times [2021-03-11 00:37:05,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:05,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233904590] [2021-03-11 00:37:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:05,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233904590] [2021-03-11 00:37:05,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775559865] [2021-03-11 00:37:05,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:05,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:05,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:05,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:05,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:05,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:05,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443460109] [2021-03-11 00:37:05,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:05,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:05,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:05,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:05,429 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:05,841 INFO L93 Difference]: Finished difference Result 202 states and 422 transitions. [2021-03-11 00:37:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:37:05,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:05,842 INFO L225 Difference]: With dead ends: 202 [2021-03-11 00:37:05,842 INFO L226 Difference]: Without dead ends: 191 [2021-03-11 00:37:05,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:37:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-03-11 00:37:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2021-03-11 00:37:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-03-11 00:37:05,845 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-03-11 00:37:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:05,845 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-03-11 00:37:05,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-03-11 00:37:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:05,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:05,846 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:06,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-11 00:37:06,055 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:06,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1450387207, now seen corresponding path program 15 times [2021-03-11 00:37:06,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:06,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400609277] [2021-03-11 00:37:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:06,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400609277] [2021-03-11 00:37:06,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636719528] [2021-03-11 00:37:06,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:06,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:37:06,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:06,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:06,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:06,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:06,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363769150] [2021-03-11 00:37:06,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:06,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:06,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:06,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:06,296 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:06,551 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-03-11 00:37:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:37:06,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:06,552 INFO L225 Difference]: With dead ends: 184 [2021-03-11 00:37:06,552 INFO L226 Difference]: Without dead ends: 171 [2021-03-11 00:37:06,552 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:37:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-11 00:37:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 153. [2021-03-11 00:37:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1842105263157894) internal successors, (332), 152 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 332 transitions. [2021-03-11 00:37:06,554 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 332 transitions. Word has length 19 [2021-03-11 00:37:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:06,555 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 332 transitions. [2021-03-11 00:37:06,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 332 transitions. [2021-03-11 00:37:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:06,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:06,555 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:06,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-11 00:37:06,756 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1731743665, now seen corresponding path program 16 times [2021-03-11 00:37:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:06,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166500154] [2021-03-11 00:37:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:06,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166500154] [2021-03-11 00:37:06,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701443571] [2021-03-11 00:37:06,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:06,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:06,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:06,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:06,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:06,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:06,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:06,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419218840] [2021-03-11 00:37:06,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:06,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:06,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:06,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:06,979 INFO L87 Difference]: Start difference. First operand 153 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:07,537 INFO L93 Difference]: Finished difference Result 335 states and 734 transitions. [2021-03-11 00:37:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:37:07,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:07,538 INFO L225 Difference]: With dead ends: 335 [2021-03-11 00:37:07,538 INFO L226 Difference]: Without dead ends: 319 [2021-03-11 00:37:07,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:37:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-03-11 00:37:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 224. [2021-03-11 00:37:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2600896860986546) internal successors, (504), 223 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 504 transitions. [2021-03-11 00:37:07,542 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 504 transitions. Word has length 19 [2021-03-11 00:37:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:07,542 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 504 transitions. [2021-03-11 00:37:07,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 504 transitions. [2021-03-11 00:37:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:07,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:07,543 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:07,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-11 00:37:07,743 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1036341529, now seen corresponding path program 17 times [2021-03-11 00:37:07,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:07,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963472786] [2021-03-11 00:37:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:07,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963472786] [2021-03-11 00:37:07,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282298608] [2021-03-11 00:37:07,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:07,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:07,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:07,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:07,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:07,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518517007] [2021-03-11 00:37:07,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:07,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:07,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:07,974 INFO L87 Difference]: Start difference. First operand 224 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:08,330 INFO L93 Difference]: Finished difference Result 349 states and 784 transitions. [2021-03-11 00:37:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:37:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:08,331 INFO L225 Difference]: With dead ends: 349 [2021-03-11 00:37:08,331 INFO L226 Difference]: Without dead ends: 332 [2021-03-11 00:37:08,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:37:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-03-11 00:37:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 250. [2021-03-11 00:37:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3453815261044175) internal successors, (584), 249 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 584 transitions. [2021-03-11 00:37:08,335 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 584 transitions. Word has length 19 [2021-03-11 00:37:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:08,335 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 584 transitions. [2021-03-11 00:37:08,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 584 transitions. [2021-03-11 00:37:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:08,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:08,336 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:08,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-11 00:37:08,547 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash 881151661, now seen corresponding path program 18 times [2021-03-11 00:37:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:08,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087736316] [2021-03-11 00:37:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:08,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087736316] [2021-03-11 00:37:08,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367914615] [2021-03-11 00:37:08,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:08,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:37:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:08,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:08,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:08,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:08,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:08,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588383661] [2021-03-11 00:37:08,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:08,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:08,787 INFO L87 Difference]: Start difference. First operand 250 states and 584 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:08,980 INFO L93 Difference]: Finished difference Result 293 states and 661 transitions. [2021-03-11 00:37:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:37:08,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:08,981 INFO L225 Difference]: With dead ends: 293 [2021-03-11 00:37:08,981 INFO L226 Difference]: Without dead ends: 277 [2021-03-11 00:37:08,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:37:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-03-11 00:37:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 250. [2021-03-11 00:37:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3373493975903616) internal successors, (582), 249 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 582 transitions. [2021-03-11 00:37:08,985 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 582 transitions. Word has length 19 [2021-03-11 00:37:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:08,985 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 582 transitions. [2021-03-11 00:37:08,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 582 transitions. [2021-03-11 00:37:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:08,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:08,985 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:09,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-11 00:37:09,199 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:09,200 INFO L82 PathProgramCache]: Analyzing trace with hash 306286283, now seen corresponding path program 19 times [2021-03-11 00:37:09,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:09,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26811642] [2021-03-11 00:37:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:09,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26811642] [2021-03-11 00:37:09,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288963281] [2021-03-11 00:37:09,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:09,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:09,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:09,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:09,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:09,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866070352] [2021-03-11 00:37:09,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:09,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:09,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:09,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:09,441 INFO L87 Difference]: Start difference. First operand 250 states and 582 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:09,703 INFO L93 Difference]: Finished difference Result 290 states and 653 transitions. [2021-03-11 00:37:09,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:37:09,704 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:09,705 INFO L225 Difference]: With dead ends: 290 [2021-03-11 00:37:09,705 INFO L226 Difference]: Without dead ends: 273 [2021-03-11 00:37:09,705 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:37:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-03-11 00:37:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 248. [2021-03-11 00:37:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3441295546558703) internal successors, (579), 247 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 579 transitions. [2021-03-11 00:37:09,709 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 579 transitions. Word has length 19 [2021-03-11 00:37:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:09,709 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 579 transitions. [2021-03-11 00:37:09,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 579 transitions. [2021-03-11 00:37:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:09,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:09,709 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:09,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:09,923 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:09,924 INFO L82 PathProgramCache]: Analyzing trace with hash 976330485, now seen corresponding path program 20 times [2021-03-11 00:37:09,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:09,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672355490] [2021-03-11 00:37:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:10,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672355490] [2021-03-11 00:37:10,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622749823] [2021-03-11 00:37:10,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:10,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:10,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:10,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:10,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:10,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:10,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:10,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048255490] [2021-03-11 00:37:10,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:10,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:10,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:10,171 INFO L87 Difference]: Start difference. First operand 248 states and 579 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:10,402 INFO L93 Difference]: Finished difference Result 277 states and 632 transitions. [2021-03-11 00:37:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:37:10,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:10,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:10,403 INFO L225 Difference]: With dead ends: 277 [2021-03-11 00:37:10,403 INFO L226 Difference]: Without dead ends: 265 [2021-03-11 00:37:10,403 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:37:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-03-11 00:37:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 247. [2021-03-11 00:37:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.341463414634146) internal successors, (576), 246 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 576 transitions. [2021-03-11 00:37:10,406 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 576 transitions. Word has length 19 [2021-03-11 00:37:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:10,406 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 576 transitions. [2021-03-11 00:37:10,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 576 transitions. [2021-03-11 00:37:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:10,407 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:10,407 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:10,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-11 00:37:10,619 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1636799901, now seen corresponding path program 21 times [2021-03-11 00:37:10,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:10,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577022817] [2021-03-11 00:37:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:10,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577022817] [2021-03-11 00:37:10,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508460876] [2021-03-11 00:37:10,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:10,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:37:10,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:10,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:10,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:10,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208591977] [2021-03-11 00:37:10,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:10,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:10,896 INFO L87 Difference]: Start difference. First operand 247 states and 576 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:11,263 INFO L93 Difference]: Finished difference Result 368 states and 842 transitions. [2021-03-11 00:37:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:37:11,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:11,265 INFO L225 Difference]: With dead ends: 368 [2021-03-11 00:37:11,265 INFO L226 Difference]: Without dead ends: 356 [2021-03-11 00:37:11,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:37:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-03-11 00:37:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 249. [2021-03-11 00:37:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.350806451612903) internal successors, (583), 248 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 583 transitions. [2021-03-11 00:37:11,268 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 583 transitions. Word has length 19 [2021-03-11 00:37:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:11,269 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 583 transitions. [2021-03-11 00:37:11,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 583 transitions. [2021-03-11 00:37:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:11,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:11,269 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:11,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:11,484 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:11,484 INFO L82 PathProgramCache]: Analyzing trace with hash -561088745, now seen corresponding path program 22 times [2021-03-11 00:37:11,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:11,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236715083] [2021-03-11 00:37:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:11,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236715083] [2021-03-11 00:37:11,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808739851] [2021-03-11 00:37:11,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:11,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:11,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:11,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:11,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:11,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:11,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:11,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220582768] [2021-03-11 00:37:11,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:11,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:11,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:11,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:11,716 INFO L87 Difference]: Start difference. First operand 249 states and 583 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:12,234 INFO L93 Difference]: Finished difference Result 314 states and 713 transitions. [2021-03-11 00:37:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:37:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:12,235 INFO L225 Difference]: With dead ends: 314 [2021-03-11 00:37:12,235 INFO L226 Difference]: Without dead ends: 303 [2021-03-11 00:37:12,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:37:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-03-11 00:37:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 246. [2021-03-11 00:37:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.342857142857143) internal successors, (574), 245 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 574 transitions. [2021-03-11 00:37:12,238 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 574 transitions. Word has length 19 [2021-03-11 00:37:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:12,238 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 574 transitions. [2021-03-11 00:37:12,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 574 transitions. [2021-03-11 00:37:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:12,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:12,239 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:12,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-11 00:37:12,453 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:12,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:12,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1101563943, now seen corresponding path program 23 times [2021-03-11 00:37:12,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:12,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260739202] [2021-03-11 00:37:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:12,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260739202] [2021-03-11 00:37:12,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95762615] [2021-03-11 00:37:12,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:12,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:12,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:12,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:12,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:12,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:12,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146029100] [2021-03-11 00:37:12,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:12,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:12,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:12,668 INFO L87 Difference]: Start difference. First operand 246 states and 574 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:13,069 INFO L93 Difference]: Finished difference Result 388 states and 906 transitions. [2021-03-11 00:37:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:37:13,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:13,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:13,070 INFO L225 Difference]: With dead ends: 388 [2021-03-11 00:37:13,070 INFO L226 Difference]: Without dead ends: 379 [2021-03-11 00:37:13,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:37:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-03-11 00:37:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 256. [2021-03-11 00:37:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.392156862745098) internal successors, (610), 255 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 610 transitions. [2021-03-11 00:37:13,074 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 610 transitions. Word has length 19 [2021-03-11 00:37:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:13,074 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 610 transitions. [2021-03-11 00:37:13,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 610 transitions. [2021-03-11 00:37:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:13,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:13,075 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:13,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:13,289 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1247703337, now seen corresponding path program 24 times [2021-03-11 00:37:13,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:13,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319285176] [2021-03-11 00:37:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:13,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319285176] [2021-03-11 00:37:13,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493112080] [2021-03-11 00:37:13,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:13,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:37:13,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:13,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:13,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:13,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:13,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136495161] [2021-03-11 00:37:13,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:13,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:13,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:13,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:13,528 INFO L87 Difference]: Start difference. First operand 256 states and 610 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:13,773 INFO L93 Difference]: Finished difference Result 361 states and 831 transitions. [2021-03-11 00:37:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:37:13,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:13,774 INFO L225 Difference]: With dead ends: 361 [2021-03-11 00:37:13,774 INFO L226 Difference]: Without dead ends: 344 [2021-03-11 00:37:13,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:37:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-03-11 00:37:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 291. [2021-03-11 00:37:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.406896551724138) internal successors, (698), 290 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 698 transitions. [2021-03-11 00:37:13,778 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 698 transitions. Word has length 19 [2021-03-11 00:37:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:13,778 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 698 transitions. [2021-03-11 00:37:13,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 698 transitions. [2021-03-11 00:37:13,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:13,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:13,779 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:13,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-11 00:37:13,993 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1394193749, now seen corresponding path program 25 times [2021-03-11 00:37:13,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:13,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718443211] [2021-03-11 00:37:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:14,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718443211] [2021-03-11 00:37:14,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17138098] [2021-03-11 00:37:14,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:14,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:14,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:14,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:14,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497771288] [2021-03-11 00:37:14,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:14,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:14,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:14,231 INFO L87 Difference]: Start difference. First operand 291 states and 698 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:14,629 INFO L93 Difference]: Finished difference Result 506 states and 1196 transitions. [2021-03-11 00:37:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:37:14,630 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:14,631 INFO L225 Difference]: With dead ends: 506 [2021-03-11 00:37:14,631 INFO L226 Difference]: Without dead ends: 489 [2021-03-11 00:37:14,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:37:14,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-11 00:37:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 330. [2021-03-11 00:37:14,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3951367781155017) internal successors, (788), 329 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 788 transitions. [2021-03-11 00:37:14,636 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 788 transitions. Word has length 19 [2021-03-11 00:37:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:14,636 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 788 transitions. [2021-03-11 00:37:14,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 788 transitions. [2021-03-11 00:37:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:14,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:14,637 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:14,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:14,851 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:14,851 INFO L82 PathProgramCache]: Analyzing trace with hash 687948011, now seen corresponding path program 26 times [2021-03-11 00:37:14,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:14,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705825734] [2021-03-11 00:37:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:14,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705825734] [2021-03-11 00:37:14,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938578374] [2021-03-11 00:37:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:14,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:14,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:15,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:15,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:15,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238097513] [2021-03-11 00:37:15,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:15,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:15,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:15,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:15,088 INFO L87 Difference]: Start difference. First operand 330 states and 788 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:15,479 INFO L93 Difference]: Finished difference Result 456 states and 1025 transitions. [2021-03-11 00:37:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:37:15,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:15,480 INFO L225 Difference]: With dead ends: 456 [2021-03-11 00:37:15,480 INFO L226 Difference]: Without dead ends: 436 [2021-03-11 00:37:15,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:37:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-03-11 00:37:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 335. [2021-03-11 00:37:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.3652694610778444) internal successors, (790), 334 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 790 transitions. [2021-03-11 00:37:15,485 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 790 transitions. Word has length 19 [2021-03-11 00:37:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:15,485 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 790 transitions. [2021-03-11 00:37:15,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 790 transitions. [2021-03-11 00:37:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:15,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:15,486 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:15,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-11 00:37:15,687 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:15,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:15,687 INFO L82 PathProgramCache]: Analyzing trace with hash -332621849, now seen corresponding path program 27 times [2021-03-11 00:37:15,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:15,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804344141] [2021-03-11 00:37:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:15,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804344141] [2021-03-11 00:37:15,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412147408] [2021-03-11 00:37:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:15,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:37:15,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:15,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:15,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:15,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925779534] [2021-03-11 00:37:15,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:15,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:15,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:15,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:15,930 INFO L87 Difference]: Start difference. First operand 335 states and 790 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:16,175 INFO L93 Difference]: Finished difference Result 389 states and 881 transitions. [2021-03-11 00:37:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:37:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:16,176 INFO L225 Difference]: With dead ends: 389 [2021-03-11 00:37:16,176 INFO L226 Difference]: Without dead ends: 370 [2021-03-11 00:37:16,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:37:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-03-11 00:37:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2021-03-11 00:37:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.3717105263157894) internal successors, (721), 304 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 721 transitions. [2021-03-11 00:37:16,180 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 721 transitions. Word has length 19 [2021-03-11 00:37:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:16,180 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 721 transitions. [2021-03-11 00:37:16,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 721 transitions. [2021-03-11 00:37:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:16,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:16,180 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:16,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:16,395 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:16,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1873029991, now seen corresponding path program 28 times [2021-03-11 00:37:16,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:16,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859625488] [2021-03-11 00:37:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:16,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859625488] [2021-03-11 00:37:16,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131789536] [2021-03-11 00:37:16,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:16,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:16,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:16,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:16,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991948929] [2021-03-11 00:37:16,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:16,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:16,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:16,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:16,633 INFO L87 Difference]: Start difference. First operand 305 states and 721 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:16,880 INFO L93 Difference]: Finished difference Result 348 states and 785 transitions. [2021-03-11 00:37:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:37:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:16,881 INFO L225 Difference]: With dead ends: 348 [2021-03-11 00:37:16,881 INFO L226 Difference]: Without dead ends: 333 [2021-03-11 00:37:16,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:37:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-03-11 00:37:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 301. [2021-03-11 00:37:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.36) internal successors, (708), 300 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:16,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 708 transitions. [2021-03-11 00:37:16,885 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 708 transitions. Word has length 19 [2021-03-11 00:37:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:16,885 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 708 transitions. [2021-03-11 00:37:16,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 708 transitions. [2021-03-11 00:37:16,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:16,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:16,886 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:17,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-11 00:37:17,099 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:17,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:17,099 INFO L82 PathProgramCache]: Analyzing trace with hash 264714809, now seen corresponding path program 29 times [2021-03-11 00:37:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:17,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403384126] [2021-03-11 00:37:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:17,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403384126] [2021-03-11 00:37:17,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088666311] [2021-03-11 00:37:17,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:17,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:17,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:17,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:17,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566424250] [2021-03-11 00:37:17,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:17,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:17,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:17,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:17,323 INFO L87 Difference]: Start difference. First operand 301 states and 708 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:17,671 INFO L93 Difference]: Finished difference Result 332 states and 757 transitions. [2021-03-11 00:37:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:37:17,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:17,672 INFO L225 Difference]: With dead ends: 332 [2021-03-11 00:37:17,672 INFO L226 Difference]: Without dead ends: 318 [2021-03-11 00:37:17,672 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:37:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-03-11 00:37:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 302. [2021-03-11 00:37:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.3488372093023258) internal successors, (707), 301 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 707 transitions. [2021-03-11 00:37:17,675 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 707 transitions. Word has length 19 [2021-03-11 00:37:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:17,675 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 707 transitions. [2021-03-11 00:37:17,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 707 transitions. [2021-03-11 00:37:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:17,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:17,676 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:17,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-11 00:37:17,890 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1254323989, now seen corresponding path program 30 times [2021-03-11 00:37:17,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:17,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416854307] [2021-03-11 00:37:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:17,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416854307] [2021-03-11 00:37:17,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418128914] [2021-03-11 00:37:17,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:17,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:37:17,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:17,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:17,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:18,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:18,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:37:18,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146531544] [2021-03-11 00:37:18,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:18,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:18,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:18,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:18,113 INFO L87 Difference]: Start difference. First operand 302 states and 707 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:18,294 INFO L93 Difference]: Finished difference Result 335 states and 755 transitions. [2021-03-11 00:37:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:37:18,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:18,296 INFO L225 Difference]: With dead ends: 335 [2021-03-11 00:37:18,296 INFO L226 Difference]: Without dead ends: 317 [2021-03-11 00:37:18,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:37:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-03-11 00:37:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 300. [2021-03-11 00:37:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.321070234113712) internal successors, (694), 299 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 694 transitions. [2021-03-11 00:37:18,302 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 694 transitions. Word has length 19 [2021-03-11 00:37:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:18,302 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 694 transitions. [2021-03-11 00:37:18,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 694 transitions. [2021-03-11 00:37:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:18,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:18,302 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:18,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:18,511 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:18,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1786837659, now seen corresponding path program 31 times [2021-03-11 00:37:18,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:18,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707151063] [2021-03-11 00:37:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:18,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707151063] [2021-03-11 00:37:18,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425718964] [2021-03-11 00:37:18,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:18,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:18,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:18,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:18,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083627209] [2021-03-11 00:37:18,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:18,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:18,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:18,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:18,760 INFO L87 Difference]: Start difference. First operand 300 states and 694 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:19,136 INFO L93 Difference]: Finished difference Result 452 states and 1035 transitions. [2021-03-11 00:37:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:37:19,136 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:19,137 INFO L225 Difference]: With dead ends: 452 [2021-03-11 00:37:19,137 INFO L226 Difference]: Without dead ends: 434 [2021-03-11 00:37:19,137 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:37:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-03-11 00:37:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 342. [2021-03-11 00:37:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.3870967741935485) internal successors, (814), 341 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 814 transitions. [2021-03-11 00:37:19,141 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 814 transitions. Word has length 19 [2021-03-11 00:37:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:19,141 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 814 transitions. [2021-03-11 00:37:19,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 814 transitions. [2021-03-11 00:37:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:19,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:19,142 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:19,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-03-11 00:37:19,343 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1586221843, now seen corresponding path program 32 times [2021-03-11 00:37:19,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:19,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564870483] [2021-03-11 00:37:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:19,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564870483] [2021-03-11 00:37:19,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446975257] [2021-03-11 00:37:19,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:19,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:19,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:19,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:19,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63091935] [2021-03-11 00:37:19,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:19,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:19,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:19,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:19,593 INFO L87 Difference]: Start difference. First operand 342 states and 814 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:19,973 INFO L93 Difference]: Finished difference Result 461 states and 1071 transitions. [2021-03-11 00:37:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:37:19,973 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:19,974 INFO L225 Difference]: With dead ends: 461 [2021-03-11 00:37:19,974 INFO L226 Difference]: Without dead ends: 447 [2021-03-11 00:37:19,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:37:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-03-11 00:37:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-03-11 00:37:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-03-11 00:37:19,979 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-03-11 00:37:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:19,979 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-03-11 00:37:19,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-03-11 00:37:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:19,979 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:19,979 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:20,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:20,194 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1657537633, now seen corresponding path program 33 times [2021-03-11 00:37:20,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:20,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867814575] [2021-03-11 00:37:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:20,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867814575] [2021-03-11 00:37:20,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911762804] [2021-03-11 00:37:20,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:20,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:37:20,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:20,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:20,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:20,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:20,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:20,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693350621] [2021-03-11 00:37:20,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:20,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:20,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:20,460 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:20,701 INFO L93 Difference]: Finished difference Result 411 states and 955 transitions. [2021-03-11 00:37:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:37:20,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:20,702 INFO L225 Difference]: With dead ends: 411 [2021-03-11 00:37:20,702 INFO L226 Difference]: Without dead ends: 389 [2021-03-11 00:37:20,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:37:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-03-11 00:37:20,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 357. [2021-03-11 00:37:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.398876404494382) internal successors, (854), 356 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 854 transitions. [2021-03-11 00:37:20,707 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 854 transitions. Word has length 19 [2021-03-11 00:37:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:20,707 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 854 transitions. [2021-03-11 00:37:20,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 854 transitions. [2021-03-11 00:37:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:20,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:20,708 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:20,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-11 00:37:20,922 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:20,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1886028755, now seen corresponding path program 34 times [2021-03-11 00:37:20,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:20,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656513942] [2021-03-11 00:37:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:20,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656513942] [2021-03-11 00:37:20,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460166748] [2021-03-11 00:37:20,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:21,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:21,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:21,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:21,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:21,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:21,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190480733] [2021-03-11 00:37:21,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:21,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:21,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:21,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:21,158 INFO L87 Difference]: Start difference. First operand 357 states and 854 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:21,420 INFO L93 Difference]: Finished difference Result 410 states and 952 transitions. [2021-03-11 00:37:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:37:21,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:21,422 INFO L225 Difference]: With dead ends: 410 [2021-03-11 00:37:21,422 INFO L226 Difference]: Without dead ends: 394 [2021-03-11 00:37:21,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:37:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-03-11 00:37:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 359. [2021-03-11 00:37:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.393854748603352) internal successors, (857), 358 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 857 transitions. [2021-03-11 00:37:21,426 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 857 transitions. Word has length 19 [2021-03-11 00:37:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:21,426 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 857 transitions. [2021-03-11 00:37:21,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 857 transitions. [2021-03-11 00:37:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:21,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:21,427 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:21,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-11 00:37:21,635 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1752716457, now seen corresponding path program 35 times [2021-03-11 00:37:21,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:21,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781681158] [2021-03-11 00:37:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:21,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781681158] [2021-03-11 00:37:21,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051422474] [2021-03-11 00:37:21,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:21,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:37:21,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:21,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:21,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:37:21,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-03-11 00:37:21,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745007179] [2021-03-11 00:37:21,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:21,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:21,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:21,869 INFO L87 Difference]: Start difference. First operand 359 states and 857 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:21,931 INFO L93 Difference]: Finished difference Result 398 states and 924 transitions. [2021-03-11 00:37:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:37:21,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:21,933 INFO L225 Difference]: With dead ends: 398 [2021-03-11 00:37:21,933 INFO L226 Difference]: Without dead ends: 386 [2021-03-11 00:37:21,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-03-11 00:37:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 354. [2021-03-11 00:37:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-03-11 00:37:21,936 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-03-11 00:37:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:21,936 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-03-11 00:37:21,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-03-11 00:37:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:21,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:21,937 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:22,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:22,147 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:22,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1532889265, now seen corresponding path program 36 times [2021-03-11 00:37:22,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:22,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734650452] [2021-03-11 00:37:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:22,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734650452] [2021-03-11 00:37:22,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210294778] [2021-03-11 00:37:22,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:22,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:37:22,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:22,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:22,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:22,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:22,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558448980] [2021-03-11 00:37:22,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:22,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:22,361 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:22,956 INFO L93 Difference]: Finished difference Result 601 states and 1374 transitions. [2021-03-11 00:37:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:37:22,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:22,958 INFO L225 Difference]: With dead ends: 601 [2021-03-11 00:37:22,958 INFO L226 Difference]: Without dead ends: 568 [2021-03-11 00:37:22,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:37:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-03-11 00:37:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 398. [2021-03-11 00:37:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.4005037783375314) internal successors, (953), 397 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 953 transitions. [2021-03-11 00:37:22,963 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 953 transitions. Word has length 19 [2021-03-11 00:37:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:22,963 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 953 transitions. [2021-03-11 00:37:22,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 953 transitions. [2021-03-11 00:37:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:22,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:22,963 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:23,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-11 00:37:23,185 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:23,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:23,185 INFO L82 PathProgramCache]: Analyzing trace with hash -471317365, now seen corresponding path program 37 times [2021-03-11 00:37:23,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:23,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696667064] [2021-03-11 00:37:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:23,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696667064] [2021-03-11 00:37:23,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950741328] [2021-03-11 00:37:23,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:23,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:23,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:23,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:23,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:23,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996011791] [2021-03-11 00:37:23,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:23,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:23,422 INFO L87 Difference]: Start difference. First operand 398 states and 953 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:23,605 INFO L93 Difference]: Finished difference Result 435 states and 1013 transitions. [2021-03-11 00:37:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:37:23,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:23,607 INFO L225 Difference]: With dead ends: 435 [2021-03-11 00:37:23,607 INFO L226 Difference]: Without dead ends: 416 [2021-03-11 00:37:23,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:37:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-03-11 00:37:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 398. [2021-03-11 00:37:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.395465994962217) internal successors, (951), 397 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 951 transitions. [2021-03-11 00:37:23,611 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 951 transitions. Word has length 19 [2021-03-11 00:37:23,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:23,611 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 951 transitions. [2021-03-11 00:37:23,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 951 transitions. [2021-03-11 00:37:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:23,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:23,612 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:23,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:23,812 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:23,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1274029861, now seen corresponding path program 38 times [2021-03-11 00:37:23,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:23,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793034629] [2021-03-11 00:37:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:23,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793034629] [2021-03-11 00:37:23,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167818941] [2021-03-11 00:37:23,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:23,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:23,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:24,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:24,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:24,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317263340] [2021-03-11 00:37:24,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:24,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:24,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:24,065 INFO L87 Difference]: Start difference. First operand 398 states and 951 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:24,419 INFO L93 Difference]: Finished difference Result 532 states and 1221 transitions. [2021-03-11 00:37:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:37:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:24,421 INFO L225 Difference]: With dead ends: 532 [2021-03-11 00:37:24,421 INFO L226 Difference]: Without dead ends: 521 [2021-03-11 00:37:24,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:37:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-11 00:37:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-03-11 00:37:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.3914141414141414) internal successors, (947), 396 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 947 transitions. [2021-03-11 00:37:24,426 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 947 transitions. Word has length 19 [2021-03-11 00:37:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:24,426 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 947 transitions. [2021-03-11 00:37:24,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 947 transitions. [2021-03-11 00:37:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:24,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:24,426 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:24,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-11 00:37:24,641 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1464333983, now seen corresponding path program 39 times [2021-03-11 00:37:24,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:24,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9329741] [2021-03-11 00:37:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:24,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9329741] [2021-03-11 00:37:24,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115801615] [2021-03-11 00:37:24,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:24,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:37:24,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:24,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:24,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:24,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:24,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273432589] [2021-03-11 00:37:24,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:24,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:24,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:24,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:24,894 INFO L87 Difference]: Start difference. First operand 397 states and 947 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:25,285 INFO L93 Difference]: Finished difference Result 528 states and 1212 transitions. [2021-03-11 00:37:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:37:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:25,286 INFO L225 Difference]: With dead ends: 528 [2021-03-11 00:37:25,286 INFO L226 Difference]: Without dead ends: 519 [2021-03-11 00:37:25,287 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 335.6ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:37:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-03-11 00:37:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 401. [2021-03-11 00:37:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.385) internal successors, (954), 400 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 954 transitions. [2021-03-11 00:37:25,291 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 954 transitions. Word has length 19 [2021-03-11 00:37:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:25,291 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 954 transitions. [2021-03-11 00:37:25,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 954 transitions. [2021-03-11 00:37:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:25,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:25,292 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:25,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:25,492 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:25,492 INFO L82 PathProgramCache]: Analyzing trace with hash 389426617, now seen corresponding path program 40 times [2021-03-11 00:37:25,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:25,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329552280] [2021-03-11 00:37:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:25,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329552280] [2021-03-11 00:37:25,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417129411] [2021-03-11 00:37:25,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:25,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:25,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:25,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:25,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:25,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423838934] [2021-03-11 00:37:25,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:25,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:25,718 INFO L87 Difference]: Start difference. First operand 401 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:26,062 INFO L93 Difference]: Finished difference Result 457 states and 1041 transitions. [2021-03-11 00:37:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:37:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:26,063 INFO L225 Difference]: With dead ends: 457 [2021-03-11 00:37:26,063 INFO L226 Difference]: Without dead ends: 440 [2021-03-11 00:37:26,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:37:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-03-11 00:37:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 402. [2021-03-11 00:37:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.374064837905237) internal successors, (952), 401 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 952 transitions. [2021-03-11 00:37:26,067 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 952 transitions. Word has length 19 [2021-03-11 00:37:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:26,067 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 952 transitions. [2021-03-11 00:37:26,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 952 transitions. [2021-03-11 00:37:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:26,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:26,068 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:26,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:26,283 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:26,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1430558513, now seen corresponding path program 41 times [2021-03-11 00:37:26,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:26,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610473606] [2021-03-11 00:37:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:26,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610473606] [2021-03-11 00:37:26,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460609324] [2021-03-11 00:37:26,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:26,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:37:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:26,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:26,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:26,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:26,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:26,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223722663] [2021-03-11 00:37:26,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:26,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:26,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:26,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:26,492 INFO L87 Difference]: Start difference. First operand 402 states and 952 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:26,696 INFO L93 Difference]: Finished difference Result 474 states and 1095 transitions. [2021-03-11 00:37:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:26,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:26,697 INFO L225 Difference]: With dead ends: 474 [2021-03-11 00:37:26,697 INFO L226 Difference]: Without dead ends: 457 [2021-03-11 00:37:26,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:37:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-11 00:37:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 395. [2021-03-11 00:37:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.3756345177664975) internal successors, (936), 394 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 936 transitions. [2021-03-11 00:37:26,701 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 936 transitions. Word has length 19 [2021-03-11 00:37:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:26,701 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 936 transitions. [2021-03-11 00:37:26,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 936 transitions. [2021-03-11 00:37:26,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:26,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:26,702 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:26,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-11 00:37:26,912 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:26,912 INFO L82 PathProgramCache]: Analyzing trace with hash 11172077, now seen corresponding path program 42 times [2021-03-11 00:37:26,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:26,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148951662] [2021-03-11 00:37:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:26,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148951662] [2021-03-11 00:37:26,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856590905] [2021-03-11 00:37:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:27,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:37:27,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:27,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:27,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:27,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:27,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491846696] [2021-03-11 00:37:27,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:27,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:27,177 INFO L87 Difference]: Start difference. First operand 395 states and 936 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:27,409 INFO L93 Difference]: Finished difference Result 505 states and 1159 transitions. [2021-03-11 00:37:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:27,410 INFO L225 Difference]: With dead ends: 505 [2021-03-11 00:37:27,410 INFO L226 Difference]: Without dead ends: 492 [2021-03-11 00:37:27,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:37:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-03-11 00:37:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 414. [2021-03-11 00:37:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.375302663438257) internal successors, (981), 413 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 981 transitions. [2021-03-11 00:37:27,414 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 981 transitions. Word has length 19 [2021-03-11 00:37:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:27,414 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 981 transitions. [2021-03-11 00:37:27,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 981 transitions. [2021-03-11 00:37:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:27,415 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:27,415 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:27,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:27,615 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash 735553785, now seen corresponding path program 43 times [2021-03-11 00:37:27,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:27,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544541493] [2021-03-11 00:37:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:27,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544541493] [2021-03-11 00:37:27,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413764282] [2021-03-11 00:37:27,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:27,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:27,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:27,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:27,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:27,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617729818] [2021-03-11 00:37:27,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:27,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:27,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:27,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:27,857 INFO L87 Difference]: Start difference. First operand 414 states and 981 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:28,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:28,055 INFO L93 Difference]: Finished difference Result 489 states and 1127 transitions. [2021-03-11 00:37:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:28,055 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:28,056 INFO L225 Difference]: With dead ends: 489 [2021-03-11 00:37:28,056 INFO L226 Difference]: Without dead ends: 469 [2021-03-11 00:37:28,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:37:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-11 00:37:28,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 435. [2021-03-11 00:37:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.3755760368663594) internal successors, (1031), 434 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1031 transitions. [2021-03-11 00:37:28,060 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1031 transitions. Word has length 19 [2021-03-11 00:37:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:28,060 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 1031 transitions. [2021-03-11 00:37:28,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1031 transitions. [2021-03-11 00:37:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:28,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:28,061 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:28,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-11 00:37:28,262 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:28,262 INFO L82 PathProgramCache]: Analyzing trace with hash 589063373, now seen corresponding path program 44 times [2021-03-11 00:37:28,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:28,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726469576] [2021-03-11 00:37:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:28,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726469576] [2021-03-11 00:37:28,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441534633] [2021-03-11 00:37:28,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:28,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:28,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:28,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:28,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:28,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:28,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:28,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192672633] [2021-03-11 00:37:28,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:28,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:28,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:28,499 INFO L87 Difference]: Start difference. First operand 435 states and 1031 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:28,750 INFO L93 Difference]: Finished difference Result 623 states and 1481 transitions. [2021-03-11 00:37:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:37:28,751 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:28,752 INFO L225 Difference]: With dead ends: 623 [2021-03-11 00:37:28,752 INFO L226 Difference]: Without dead ends: 609 [2021-03-11 00:37:28,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:37:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-11 00:37:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 521. [2021-03-11 00:37:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.4288461538461537) internal successors, (1263), 520 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1263 transitions. [2021-03-11 00:37:28,758 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1263 transitions. Word has length 19 [2021-03-11 00:37:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:28,758 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 1263 transitions. [2021-03-11 00:37:28,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1263 transitions. [2021-03-11 00:37:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:28,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:28,759 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:28,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:28,960 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:28,960 INFO L82 PathProgramCache]: Analyzing trace with hash -737202913, now seen corresponding path program 45 times [2021-03-11 00:37:28,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:28,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961800105] [2021-03-11 00:37:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:29,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961800105] [2021-03-11 00:37:29,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474145662] [2021-03-11 00:37:29,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:29,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:37:29,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:29,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:29,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:29,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:29,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:29,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012707825] [2021-03-11 00:37:29,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:29,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:29,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:29,198 INFO L87 Difference]: Start difference. First operand 521 states and 1263 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:29,463 INFO L93 Difference]: Finished difference Result 570 states and 1340 transitions. [2021-03-11 00:37:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:37:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:29,465 INFO L225 Difference]: With dead ends: 570 [2021-03-11 00:37:29,465 INFO L226 Difference]: Without dead ends: 553 [2021-03-11 00:37:29,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:37:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-03-11 00:37:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 480. [2021-03-11 00:37:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.363256784968685) internal successors, (1132), 479 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1132 transitions. [2021-03-11 00:37:29,470 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1132 transitions. Word has length 19 [2021-03-11 00:37:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:29,470 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 1132 transitions. [2021-03-11 00:37:29,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1132 transitions. [2021-03-11 00:37:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:29,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:29,470 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:29,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-11 00:37:29,671 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:29,671 INFO L82 PathProgramCache]: Analyzing trace with hash -67158711, now seen corresponding path program 46 times [2021-03-11 00:37:29,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:29,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219038680] [2021-03-11 00:37:29,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:29,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219038680] [2021-03-11 00:37:29,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71770158] [2021-03-11 00:37:29,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:29,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:29,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:29,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:29,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:29,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:29,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132484070] [2021-03-11 00:37:29,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:29,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:29,896 INFO L87 Difference]: Start difference. First operand 480 states and 1132 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:30,416 INFO L93 Difference]: Finished difference Result 737 states and 1672 transitions. [2021-03-11 00:37:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:37:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:30,418 INFO L225 Difference]: With dead ends: 737 [2021-03-11 00:37:30,418 INFO L226 Difference]: Without dead ends: 718 [2021-03-11 00:37:30,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:37:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-03-11 00:37:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 533. [2021-03-11 00:37:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.3477443609022557) internal successors, (1249), 532 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1249 transitions. [2021-03-11 00:37:30,424 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1249 transitions. Word has length 19 [2021-03-11 00:37:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:30,424 INFO L480 AbstractCegarLoop]: Abstraction has 533 states and 1249 transitions. [2021-03-11 00:37:30,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1249 transitions. [2021-03-11 00:37:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:30,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:30,425 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:30,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-11 00:37:30,625 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:30,626 INFO L82 PathProgramCache]: Analyzing trace with hash 338508243, now seen corresponding path program 47 times [2021-03-11 00:37:30,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:30,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757537594] [2021-03-11 00:37:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757537594] [2021-03-11 00:37:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975271709] [2021-03-11 00:37:30,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:30,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:30,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:30,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:30,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:37:30,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-03-11 00:37:30,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537466891] [2021-03-11 00:37:30,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:30,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:30,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:30,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:30,857 INFO L87 Difference]: Start difference. First operand 533 states and 1249 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:30,978 INFO L93 Difference]: Finished difference Result 675 states and 1555 transitions. [2021-03-11 00:37:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:30,978 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:30,980 INFO L225 Difference]: With dead ends: 675 [2021-03-11 00:37:30,980 INFO L226 Difference]: Without dead ends: 660 [2021-03-11 00:37:30,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:37:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-03-11 00:37:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 390. [2021-03-11 00:37:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3059125964010283) internal successors, (897), 389 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 897 transitions. [2021-03-11 00:37:30,985 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 897 transitions. Word has length 19 [2021-03-11 00:37:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:30,985 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 897 transitions. [2021-03-11 00:37:30,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 897 transitions. [2021-03-11 00:37:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:30,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:30,986 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:31,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:31,187 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:31,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1596297767, now seen corresponding path program 48 times [2021-03-11 00:37:31,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:31,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559930756] [2021-03-11 00:37:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:31,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559930756] [2021-03-11 00:37:31,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052570911] [2021-03-11 00:37:31,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:31,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:37:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:31,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:31,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:31,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627212237] [2021-03-11 00:37:31,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:31,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:31,444 INFO L87 Difference]: Start difference. First operand 390 states and 897 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:32,067 INFO L93 Difference]: Finished difference Result 552 states and 1225 transitions. [2021-03-11 00:37:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:37:32,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:32,069 INFO L225 Difference]: With dead ends: 552 [2021-03-11 00:37:32,069 INFO L226 Difference]: Without dead ends: 531 [2021-03-11 00:37:32,069 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:37:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-03-11 00:37:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 431. [2021-03-11 00:37:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.3232558139534882) internal successors, (999), 430 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 999 transitions. [2021-03-11 00:37:32,074 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 999 transitions. Word has length 19 [2021-03-11 00:37:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:32,074 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 999 transitions. [2021-03-11 00:37:32,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 999 transitions. [2021-03-11 00:37:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:32,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:32,075 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:32,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-11 00:37:32,283 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1320337189, now seen corresponding path program 49 times [2021-03-11 00:37:32,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:32,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316976023] [2021-03-11 00:37:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:32,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316976023] [2021-03-11 00:37:32,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408239360] [2021-03-11 00:37:32,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:32,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:32,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:32,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:32,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:32,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671053967] [2021-03-11 00:37:32,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:32,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:32,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:32,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:32,516 INFO L87 Difference]: Start difference. First operand 431 states and 999 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:32,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:32,719 INFO L93 Difference]: Finished difference Result 490 states and 1117 transitions. [2021-03-11 00:37:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:37:32,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:32,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:32,721 INFO L225 Difference]: With dead ends: 490 [2021-03-11 00:37:32,721 INFO L226 Difference]: Without dead ends: 476 [2021-03-11 00:37:32,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:37:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-11 00:37:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-03-11 00:37:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.278481012658228) internal successors, (900), 395 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 900 transitions. [2021-03-11 00:37:32,725 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 900 transitions. Word has length 19 [2021-03-11 00:37:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:32,725 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 900 transitions. [2021-03-11 00:37:32,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 900 transitions. [2021-03-11 00:37:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:32,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:32,725 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:32,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:32,926 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:32,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:32,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1648363821, now seen corresponding path program 50 times [2021-03-11 00:37:32,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:32,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944424196] [2021-03-11 00:37:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:32,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944424196] [2021-03-11 00:37:32,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005746331] [2021-03-11 00:37:32,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:33,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:33,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:33,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:33,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:33,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:33,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205962119] [2021-03-11 00:37:33,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:33,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:33,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:33,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:33,162 INFO L87 Difference]: Start difference. First operand 396 states and 900 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:33,391 INFO L93 Difference]: Finished difference Result 448 states and 1001 transitions. [2021-03-11 00:37:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:37:33,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:33,393 INFO L225 Difference]: With dead ends: 448 [2021-03-11 00:37:33,393 INFO L226 Difference]: Without dead ends: 434 [2021-03-11 00:37:33,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:37:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-03-11 00:37:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-03-11 00:37:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.197986577181208) internal successors, (655), 298 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 655 transitions. [2021-03-11 00:37:33,396 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 655 transitions. Word has length 19 [2021-03-11 00:37:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:33,396 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 655 transitions. [2021-03-11 00:37:33,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 655 transitions. [2021-03-11 00:37:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:33,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:33,397 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:33,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:33,603 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1976559273, now seen corresponding path program 51 times [2021-03-11 00:37:33,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:33,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727180489] [2021-03-11 00:37:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:33,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727180489] [2021-03-11 00:37:33,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319974425] [2021-03-11 00:37:33,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:33,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:37:33,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:33,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:33,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:33,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:33,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162500763] [2021-03-11 00:37:33,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:33,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:33,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:33,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:33,841 INFO L87 Difference]: Start difference. First operand 299 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:34,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:34,071 INFO L93 Difference]: Finished difference Result 337 states and 722 transitions. [2021-03-11 00:37:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:34,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:34,072 INFO L225 Difference]: With dead ends: 337 [2021-03-11 00:37:34,072 INFO L226 Difference]: Without dead ends: 326 [2021-03-11 00:37:34,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:37:34,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-03-11 00:37:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 297. [2021-03-11 00:37:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.195945945945946) internal successors, (650), 296 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 650 transitions. [2021-03-11 00:37:34,075 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 650 transitions. Word has length 19 [2021-03-11 00:37:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:34,075 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 650 transitions. [2021-03-11 00:37:34,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 650 transitions. [2021-03-11 00:37:34,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:34,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:34,075 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:34,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:34,276 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:34,276 INFO L82 PathProgramCache]: Analyzing trace with hash -900848117, now seen corresponding path program 52 times [2021-03-11 00:37:34,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:34,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883982483] [2021-03-11 00:37:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:34,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883982483] [2021-03-11 00:37:34,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78787506] [2021-03-11 00:37:34,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:34,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:34,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:34,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:34,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:34,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216944149] [2021-03-11 00:37:34,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:34,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:34,509 INFO L87 Difference]: Start difference. First operand 297 states and 650 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:35,343 INFO L93 Difference]: Finished difference Result 546 states and 1150 transitions. [2021-03-11 00:37:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:37:35,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:35,344 INFO L225 Difference]: With dead ends: 546 [2021-03-11 00:37:35,344 INFO L226 Difference]: Without dead ends: 527 [2021-03-11 00:37:35,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 762.8ms TimeCoverageRelationStatistics Valid=624, Invalid=2238, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:37:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-03-11 00:37:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 330. [2021-03-11 00:37:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2036474164133737) internal successors, (725), 329 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 725 transitions. [2021-03-11 00:37:35,348 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 725 transitions. Word has length 19 [2021-03-11 00:37:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:35,348 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 725 transitions. [2021-03-11 00:37:35,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 725 transitions. [2021-03-11 00:37:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:35,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:35,349 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:35,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:35,550 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash -258765289, now seen corresponding path program 53 times [2021-03-11 00:37:35,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:35,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516604316] [2021-03-11 00:37:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:35,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516604316] [2021-03-11 00:37:35,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116317622] [2021-03-11 00:37:35,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:35,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:35,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:35,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:35,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:35,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:35,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716577918] [2021-03-11 00:37:35,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:35,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:35,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:35,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:35,789 INFO L87 Difference]: Start difference. First operand 330 states and 725 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:35,991 INFO L93 Difference]: Finished difference Result 370 states and 790 transitions. [2021-03-11 00:37:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:35,992 INFO L225 Difference]: With dead ends: 370 [2021-03-11 00:37:35,992 INFO L226 Difference]: Without dead ends: 349 [2021-03-11 00:37:35,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:37:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-03-11 00:37:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 301. [2021-03-11 00:37:35,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.183333333333333) internal successors, (655), 300 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 655 transitions. [2021-03-11 00:37:35,995 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 655 transitions. Word has length 19 [2021-03-11 00:37:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:35,996 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 655 transitions. [2021-03-11 00:37:35,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 655 transitions. [2021-03-11 00:37:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:35,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:35,996 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:36,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:36,196 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:36,197 INFO L82 PathProgramCache]: Analyzing trace with hash -385810339, now seen corresponding path program 54 times [2021-03-11 00:37:36,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:36,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262472717] [2021-03-11 00:37:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:36,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262472717] [2021-03-11 00:37:36,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822160276] [2021-03-11 00:37:36,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:36,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:37:36,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:36,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:36,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:36,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:36,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101001908] [2021-03-11 00:37:36,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:36,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:36,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:36,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:36,446 INFO L87 Difference]: Start difference. First operand 301 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:36,692 INFO L93 Difference]: Finished difference Result 354 states and 743 transitions. [2021-03-11 00:37:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:37:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:36,693 INFO L225 Difference]: With dead ends: 354 [2021-03-11 00:37:36,693 INFO L226 Difference]: Without dead ends: 340 [2021-03-11 00:37:36,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 292.0ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:37:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-03-11 00:37:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 297. [2021-03-11 00:37:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.1824324324324325) internal successors, (646), 296 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 646 transitions. [2021-03-11 00:37:36,696 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 646 transitions. Word has length 19 [2021-03-11 00:37:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:36,696 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 646 transitions. [2021-03-11 00:37:36,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 646 transitions. [2021-03-11 00:37:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:36,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:36,697 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:36,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:36,897 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash 529271149, now seen corresponding path program 55 times [2021-03-11 00:37:36,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:36,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271661379] [2021-03-11 00:37:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:36,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271661379] [2021-03-11 00:37:36,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937887240] [2021-03-11 00:37:36,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:37,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:37,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:37,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447152299] [2021-03-11 00:37:37,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:37,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:37,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:37,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:37,179 INFO L87 Difference]: Start difference. First operand 297 states and 646 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:37,349 INFO L93 Difference]: Finished difference Result 323 states and 685 transitions. [2021-03-11 00:37:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:37:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:37,350 INFO L225 Difference]: With dead ends: 323 [2021-03-11 00:37:37,350 INFO L226 Difference]: Without dead ends: 309 [2021-03-11 00:37:37,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:37:37,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-03-11 00:37:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 275. [2021-03-11 00:37:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1824817518248176) internal successors, (598), 274 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 598 transitions. [2021-03-11 00:37:37,353 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 598 transitions. Word has length 19 [2021-03-11 00:37:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:37,353 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 598 transitions. [2021-03-11 00:37:37,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 598 transitions. [2021-03-11 00:37:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:37,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:37,354 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:37,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-03-11 00:37:37,554 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:37,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1199315351, now seen corresponding path program 56 times [2021-03-11 00:37:37,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:37,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007664585] [2021-03-11 00:37:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:37,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007664585] [2021-03-11 00:37:37,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885845839] [2021-03-11 00:37:37,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:37,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:37,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:37,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:37,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:37,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:37,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839239859] [2021-03-11 00:37:37,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:37,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:37,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:37,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:37,810 INFO L87 Difference]: Start difference. First operand 275 states and 598 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:37,979 INFO L93 Difference]: Finished difference Result 299 states and 633 transitions. [2021-03-11 00:37:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:37:37,979 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:37,980 INFO L225 Difference]: With dead ends: 299 [2021-03-11 00:37:37,980 INFO L226 Difference]: Without dead ends: 289 [2021-03-11 00:37:37,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:37:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-03-11 00:37:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 261. [2021-03-11 00:37:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.1846153846153844) internal successors, (568), 260 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 568 transitions. [2021-03-11 00:37:37,983 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 568 transitions. Word has length 19 [2021-03-11 00:37:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:37,983 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 568 transitions. [2021-03-11 00:37:37,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 568 transitions. [2021-03-11 00:37:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:37,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:37,983 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:38,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:38,184 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:38,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1432999257, now seen corresponding path program 57 times [2021-03-11 00:37:38,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:38,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707155307] [2021-03-11 00:37:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:38,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707155307] [2021-03-11 00:37:38,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878100175] [2021-03-11 00:37:38,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:38,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:37:38,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:38,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:38,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:38,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:37:38,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181602983] [2021-03-11 00:37:38,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:37:38,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:37:38,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:38,462 INFO L87 Difference]: Start difference. First operand 261 states and 568 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:38,615 INFO L93 Difference]: Finished difference Result 282 states and 599 transitions. [2021-03-11 00:37:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:37:38,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:38,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:38,616 INFO L225 Difference]: With dead ends: 282 [2021-03-11 00:37:38,616 INFO L226 Difference]: Without dead ends: 273 [2021-03-11 00:37:38,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:37:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-03-11 00:37:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-03-11 00:37:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-03-11 00:37:38,623 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-03-11 00:37:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:38,623 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-03-11 00:37:38,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-03-11 00:37:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:38,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:38,623 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:38,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-11 00:37:38,835 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:38,835 INFO L82 PathProgramCache]: Analyzing trace with hash -265385941, now seen corresponding path program 58 times [2021-03-11 00:37:38,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:38,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804282923] [2021-03-11 00:37:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:38,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804282923] [2021-03-11 00:37:38,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857396105] [2021-03-11 00:37:38,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:38,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:38,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:37:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:39,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:39,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:37:39,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531750413] [2021-03-11 00:37:39,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:37:39,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:37:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:39,086 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:39,489 INFO L93 Difference]: Finished difference Result 319 states and 675 transitions. [2021-03-11 00:37:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:37:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:39,490 INFO L225 Difference]: With dead ends: 319 [2021-03-11 00:37:39,490 INFO L226 Difference]: Without dead ends: 304 [2021-03-11 00:37:39,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:37:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-03-11 00:37:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-03-11 00:37:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-03-11 00:37:39,493 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-03-11 00:37:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:39,493 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-03-11 00:37:39,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-03-11 00:37:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:37:39,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:39,493 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:39,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:39,694 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:39,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1815085655, now seen corresponding path program 59 times [2021-03-11 00:37:39,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:39,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391064557] [2021-03-11 00:37:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:39,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391064557] [2021-03-11 00:37:39,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603940880] [2021-03-11 00:37:39,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:39,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:39,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:39,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:39,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:39,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:37:39,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-03-11 00:37:39,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756955455] [2021-03-11 00:37:39,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:39,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:39,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:39,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:39,916 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:39,958 INFO L93 Difference]: Finished difference Result 264 states and 566 transitions. [2021-03-11 00:37:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:37:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-03-11 00:37:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:39,959 INFO L225 Difference]: With dead ends: 264 [2021-03-11 00:37:39,959 INFO L226 Difference]: Without dead ends: 198 [2021-03-11 00:37:39,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-11 00:37:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 171. [2021-03-11 00:37:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.6764705882352942) internal successors, (285), 170 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 285 transitions. [2021-03-11 00:37:39,961 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 285 transitions. Word has length 19 [2021-03-11 00:37:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:39,961 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 285 transitions. [2021-03-11 00:37:39,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 285 transitions. [2021-03-11 00:37:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:37:39,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:39,961 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:40,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:40,167 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:40,167 INFO L82 PathProgramCache]: Analyzing trace with hash -477505781, now seen corresponding path program 60 times [2021-03-11 00:37:40,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:40,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759047168] [2021-03-11 00:37:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:40,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759047168] [2021-03-11 00:37:40,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433301828] [2021-03-11 00:37:40,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:40,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:37:40,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:40,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:37:40,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:40,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:40,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-11 00:37:40,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561902187] [2021-03-11 00:37:40,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 00:37:40,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 00:37:40,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:37:40,243 INFO L87 Difference]: Start difference. First operand 171 states and 285 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:40,321 INFO L93 Difference]: Finished difference Result 213 states and 345 transitions. [2021-03-11 00:37:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:37:40,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-03-11 00:37:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:40,322 INFO L225 Difference]: With dead ends: 213 [2021-03-11 00:37:40,322 INFO L226 Difference]: Without dead ends: 213 [2021-03-11 00:37:40,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:37:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-11 00:37:40,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-03-11 00:37:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-03-11 00:37:40,324 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 21 [2021-03-11 00:37:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:40,324 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-03-11 00:37:40,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-03-11 00:37:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:37:40,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:40,324 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:40,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:40,524 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:40,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1317377295, now seen corresponding path program 61 times [2021-03-11 00:37:40,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:40,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258368235] [2021-03-11 00:37:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:40,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258368235] [2021-03-11 00:37:40,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993140850] [2021-03-11 00:37:40,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:40,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:37:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:40,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:40,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-11 00:37:40,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928468113] [2021-03-11 00:37:40,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:37:40,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:40,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:37:40,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:37:40,588 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:40,683 INFO L93 Difference]: Finished difference Result 199 states and 319 transitions. [2021-03-11 00:37:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:37:40,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-03-11 00:37:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:40,683 INFO L225 Difference]: With dead ends: 199 [2021-03-11 00:37:40,683 INFO L226 Difference]: Without dead ends: 184 [2021-03-11 00:37:40,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:37:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-03-11 00:37:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 155. [2021-03-11 00:37:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-03-11 00:37:40,685 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-03-11 00:37:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:40,685 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-03-11 00:37:40,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-03-11 00:37:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:37:40,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:40,685 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:40,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:40,891 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:40,891 INFO L82 PathProgramCache]: Analyzing trace with hash -25018099, now seen corresponding path program 62 times [2021-03-11 00:37:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:40,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488635016] [2021-03-11 00:37:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:40,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488635016] [2021-03-11 00:37:40,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569035535] [2021-03-11 00:37:40,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:40,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:40,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:40,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-11 00:37:40,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:41,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:41,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-03-11 00:37:41,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911533378] [2021-03-11 00:37:41,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:37:41,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:41,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:37:41,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:37:41,047 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2021-03-11 00:37:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:41,275 INFO L93 Difference]: Finished difference Result 190 states and 305 transitions. [2021-03-11 00:37:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:37:41,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 21 [2021-03-11 00:37:41,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:41,276 INFO L225 Difference]: With dead ends: 190 [2021-03-11 00:37:41,276 INFO L226 Difference]: Without dead ends: 186 [2021-03-11 00:37:41,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:37:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-11 00:37:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-03-11 00:37:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-03-11 00:37:41,278 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-03-11 00:37:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:41,278 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-03-11 00:37:41,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2021-03-11 00:37:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-03-11 00:37:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:37:41,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:41,278 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:41,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-03-11 00:37:41,479 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash -856436821, now seen corresponding path program 63 times [2021-03-11 00:37:41,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:41,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673282708] [2021-03-11 00:37:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:41,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673282708] [2021-03-11 00:37:41,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562800399] [2021-03-11 00:37:41,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:41,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:37:41,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:41,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:41,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:41,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-03-11 00:37:41,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154159095] [2021-03-11 00:37:41,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:37:41,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:41,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:37:41,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:37:41,639 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:42,111 INFO L93 Difference]: Finished difference Result 203 states and 330 transitions. [2021-03-11 00:37:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:37:42,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 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 21 [2021-03-11 00:37:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:42,112 INFO L225 Difference]: With dead ends: 203 [2021-03-11 00:37:42,112 INFO L226 Difference]: Without dead ends: 187 [2021-03-11 00:37:42,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=368, Invalid=1272, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:37:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-11 00:37:42,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2021-03-11 00:37:42,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.6875) internal successors, (243), 144 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 243 transitions. [2021-03-11 00:37:42,114 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 243 transitions. Word has length 21 [2021-03-11 00:37:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:42,114 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 243 transitions. [2021-03-11 00:37:42,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:42,114 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 243 transitions. [2021-03-11 00:37:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:37:42,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:42,114 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:42,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:42,314 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:42,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1784149655, now seen corresponding path program 64 times [2021-03-11 00:37:42,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:42,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561171534] [2021-03-11 00:37:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561171534] [2021-03-11 00:37:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935529314] [2021-03-11 00:37:42,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:42,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:42,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:42,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:37:42,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:42,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:42,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-11 00:37:42,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721166538] [2021-03-11 00:37:42,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:37:42,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:42,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:37:42,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:37:42,637 INFO L87 Difference]: Start difference. First operand 145 states and 243 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:43,027 INFO L93 Difference]: Finished difference Result 244 states and 400 transitions. [2021-03-11 00:37:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:37:43,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:37:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:43,028 INFO L225 Difference]: With dead ends: 244 [2021-03-11 00:37:43,028 INFO L226 Difference]: Without dead ends: 218 [2021-03-11 00:37:43,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:37:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-11 00:37:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 167. [2021-03-11 00:37:43,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-03-11 00:37:43,030 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 23 [2021-03-11 00:37:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:43,030 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-03-11 00:37:43,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-03-11 00:37:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:37:43,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:43,030 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:43,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:43,235 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2003485607, now seen corresponding path program 65 times [2021-03-11 00:37:43,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:43,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247410966] [2021-03-11 00:37:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:43,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247410966] [2021-03-11 00:37:43,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866049277] [2021-03-11 00:37:43,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:43,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:37:43,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:43,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:43,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:37:43,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:43,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-03-11 00:37:43,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641151798] [2021-03-11 00:37:43,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:37:43,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:43,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:37:43,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:37:43,511 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:43,949 INFO L93 Difference]: Finished difference Result 206 states and 330 transitions. [2021-03-11 00:37:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:37:43,950 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:37:43,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:43,950 INFO L225 Difference]: With dead ends: 206 [2021-03-11 00:37:43,950 INFO L226 Difference]: Without dead ends: 193 [2021-03-11 00:37:43,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:37:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-11 00:37:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-03-11 00:37:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.6312056737588652) internal successors, (230), 141 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2021-03-11 00:37:43,952 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 23 [2021-03-11 00:37:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:43,952 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2021-03-11 00:37:43,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2021-03-11 00:37:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:37:43,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:43,952 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:44,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-11 00:37:44,153 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash 677219321, now seen corresponding path program 66 times [2021-03-11 00:37:44,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:44,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46376219] [2021-03-11 00:37:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:44,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46376219] [2021-03-11 00:37:44,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664010578] [2021-03-11 00:37:44,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:44,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:37:44,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:44,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:44,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-11 00:37:44,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043331830] [2021-03-11 00:37:44,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:37:44,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:44,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:37:44,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:37:44,467 INFO L87 Difference]: Start difference. First operand 142 states and 230 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:44,905 INFO L93 Difference]: Finished difference Result 182 states and 286 transitions. [2021-03-11 00:37:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:37:44,906 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:37:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:44,906 INFO L225 Difference]: With dead ends: 182 [2021-03-11 00:37:44,906 INFO L226 Difference]: Without dead ends: 158 [2021-03-11 00:37:44,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:37:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-11 00:37:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2021-03-11 00:37:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.6120689655172413) internal successors, (187), 116 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 187 transitions. [2021-03-11 00:37:44,908 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 187 transitions. Word has length 23 [2021-03-11 00:37:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:44,908 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 187 transitions. [2021-03-11 00:37:44,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 187 transitions. [2021-03-11 00:37:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:37:44,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:44,908 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:45,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:45,115 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:45,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1752930477, now seen corresponding path program 67 times [2021-03-11 00:37:45,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:45,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259988733] [2021-03-11 00:37:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:45,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259988733] [2021-03-11 00:37:45,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513703860] [2021-03-11 00:37:45,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:45,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:45,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-11 00:37:45,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740638817] [2021-03-11 00:37:45,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:37:45,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:45,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:37:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:37:45,431 INFO L87 Difference]: Start difference. First operand 117 states and 187 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:45,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:45,825 INFO L93 Difference]: Finished difference Result 147 states and 230 transitions. [2021-03-11 00:37:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:37:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:37:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:45,826 INFO L225 Difference]: With dead ends: 147 [2021-03-11 00:37:45,826 INFO L226 Difference]: Without dead ends: 92 [2021-03-11 00:37:45,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 473.3ms TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:37:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-11 00:37:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-03-11 00:37:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2021-03-11 00:37:45,827 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 23 [2021-03-11 00:37:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:45,827 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2021-03-11 00:37:45,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2021-03-11 00:37:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:37:45,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:45,828 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:46,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-11 00:37:46,028 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:46,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1920453071, now seen corresponding path program 68 times [2021-03-11 00:37:46,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:46,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615694141] [2021-03-11 00:37:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:46,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615694141] [2021-03-11 00:37:46,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525356457] [2021-03-11 00:37:46,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:46,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:46,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:37:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:46,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:46,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-11 00:37:46,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003407752] [2021-03-11 00:37:46,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:37:46,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:46,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:37:46,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:37:46,395 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:46,731 INFO L93 Difference]: Finished difference Result 117 states and 172 transitions. [2021-03-11 00:37:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:37:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:37:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:46,732 INFO L225 Difference]: With dead ends: 117 [2021-03-11 00:37:46,732 INFO L226 Difference]: Without dead ends: 99 [2021-03-11 00:37:46,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 449.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:37:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-03-11 00:37:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2021-03-11 00:37:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4880952380952381) internal successors, (125), 84 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 125 transitions. [2021-03-11 00:37:46,733 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 125 transitions. Word has length 23 [2021-03-11 00:37:46,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:46,733 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 125 transitions. [2021-03-11 00:37:46,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:46,733 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 125 transitions. [2021-03-11 00:37:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:37:46,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:46,733 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:46,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-11 00:37:46,934 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:46,934 INFO L82 PathProgramCache]: Analyzing trace with hash 827116973, now seen corresponding path program 69 times [2021-03-11 00:37:46,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:46,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843462583] [2021-03-11 00:37:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:47,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843462583] [2021-03-11 00:37:47,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741136109] [2021-03-11 00:37:47,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:47,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:37:47,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:47,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:47,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:47,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-03-11 00:37:47,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641017906] [2021-03-11 00:37:47,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:37:47,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:37:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:37:47,244 INFO L87 Difference]: Start difference. First operand 85 states and 125 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:47,580 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2021-03-11 00:37:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:37:47,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:37:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:47,580 INFO L225 Difference]: With dead ends: 111 [2021-03-11 00:37:47,581 INFO L226 Difference]: Without dead ends: 91 [2021-03-11 00:37:47,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:37:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-11 00:37:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-03-11 00:37:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 71 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2021-03-11 00:37:47,582 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 23 [2021-03-11 00:37:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:47,582 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2021-03-11 00:37:47,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2021-03-11 00:37:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:37:47,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:47,582 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:47,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-11 00:37:47,783 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1790978285, now seen corresponding path program 70 times [2021-03-11 00:37:47,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:47,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228380501] [2021-03-11 00:37:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:47,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228380501] [2021-03-11 00:37:47,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169320100] [2021-03-11 00:37:47,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:47,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:47,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:37:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:48,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:48,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-11 00:37:48,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410995232] [2021-03-11 00:37:48,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:37:48,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:37:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:37:48,076 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:48,622 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-03-11 00:37:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:37:48,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:37:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:48,622 INFO L225 Difference]: With dead ends: 130 [2021-03-11 00:37:48,622 INFO L226 Difference]: Without dead ends: 109 [2021-03-11 00:37:48,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=431, Invalid=1639, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:37:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-11 00:37:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2021-03-11 00:37:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.475) internal successors, (118), 80 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 118 transitions. [2021-03-11 00:37:48,624 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 118 transitions. Word has length 23 [2021-03-11 00:37:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:48,624 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 118 transitions. [2021-03-11 00:37:48,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 118 transitions. [2021-03-11 00:37:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:37:48,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:48,624 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:48,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:48,825 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:48,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:48,825 INFO L82 PathProgramCache]: Analyzing trace with hash -266912117, now seen corresponding path program 71 times [2021-03-11 00:37:48,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:48,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044308881] [2021-03-11 00:37:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:48,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044308881] [2021-03-11 00:37:48,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163093155] [2021-03-11 00:37:48,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:48,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:37:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:37:49,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:37:49,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2021-03-11 00:37:49,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092618883] [2021-03-11 00:37:49,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:49,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:37:49,095 INFO L87 Difference]: Start difference. First operand 81 states and 118 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:49,167 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2021-03-11 00:37:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:37:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:37:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:49,168 INFO L225 Difference]: With dead ends: 88 [2021-03-11 00:37:49,168 INFO L226 Difference]: Without dead ends: 40 [2021-03-11 00:37:49,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:37:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-03-11 00:37:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-03-11 00:37:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2021-03-11 00:37:49,169 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 23 [2021-03-11 00:37:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:49,169 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2021-03-11 00:37:49,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2021-03-11 00:37:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:37:49,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:49,169 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:37:49,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-11 00:37:49,383 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash 516021093, now seen corresponding path program 72 times [2021-03-11 00:37:49,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:49,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291828587] [2021-03-11 00:37:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:49,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291828587] [2021-03-11 00:37:49,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694482690] [2021-03-11 00:37:49,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:49,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:37:49,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:49,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:37:49,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-11 00:37:49,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-11 00:37:49,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 22 [2021-03-11 00:37:49,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906720844] [2021-03-11 00:37:49,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:49,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:49,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:49,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:37:49,699 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:49,729 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-03-11 00:37:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:37:49,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:37:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:49,730 INFO L225 Difference]: With dead ends: 38 [2021-03-11 00:37:49,730 INFO L226 Difference]: Without dead ends: 0 [2021-03-11 00:37:49,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:37:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-11 00:37:49,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-11 00:37:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-11 00:37:49,730 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-03-11 00:37:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:49,730 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-11 00:37:49,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-11 00:37:49,730 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-11 00:37:49,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-11 00:37:49,933 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:37:49 BasicIcfg [2021-03-11 00:37:49,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:37:49,934 INFO L168 Benchmark]: Toolchain (without parser) took 60034.43 ms. Allocated memory was 255.9 MB in the beginning and 513.8 MB in the end (delta: 257.9 MB). Free memory was 236.3 MB in the beginning and 251.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 243.6 MB. Max. memory is 16.0 GB. [2021-03-11 00:37:49,934 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:37:49,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.75 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:37:49,934 INFO L168 Benchmark]: Boogie Preprocessor took 11.05 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:37:49,934 INFO L168 Benchmark]: RCFGBuilder took 149.57 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 223.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 00:37:49,934 INFO L168 Benchmark]: TraceAbstraction took 59847.22 ms. Allocated memory was 255.9 MB in the beginning and 513.8 MB in the end (delta: 257.9 MB). Free memory was 223.3 MB in the beginning and 251.3 MB in the end (delta: -28.0 MB). Peak memory consumption was 231.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:37:49,935 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.75 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.05 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 149.57 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 223.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 59847.22 ms. Allocated memory was 255.9 MB in the beginning and 513.8 MB in the end (delta: 257.9 MB). Free memory was 223.3 MB in the beginning and 251.3 MB in the end (delta: -28.0 MB). Peak memory consumption was 231.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 59773.4ms, OverallIterations: 104, TraceHistogramMax: 3, EmptinessCheckTime: 44.5ms, AutomataDifference: 24177.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2410 SDtfs, 4546 SDslu, 13187 SDs, 0 SdLazy, 28551 SolverSat, 1596 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9470.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3278 GetRequests, 837 SyntacticMatches, 142 SemanticMatches, 2299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12401 ImplicationChecksByTransitivity, 24716.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=533occurred in iteration=78, InterpolantAutomatonStates: 1578, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 332.9ms AutomataMinimizationTime, 104 MinimizatonAttempts, 4705 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 134.3ms SsaConstructionTime, 430.7ms SatisfiabilityAnalysisTime, 18046.3ms InterpolantComputationTime, 3387 NumberOfCodeBlocks, 3387 NumberOfCodeBlocksAsserted, 259 NumberOfCheckSat, 3208 ConstructedInterpolants, 0 QuantifiedInterpolants, 26694 SizeOfPredicates, 270 NumberOfNonLiveVariables, 2838 ConjunctsInSsa, 1021 ConjunctsInUnsatCore, 179 InterpolantComputations, 39 PerfectInterpolantSequences, 107/455 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...