/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 18:36:52,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 18:36:52,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 18:36:52,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 18:36:52,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 18:36:52,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 18:36:52,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 18:36:52,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 18:36:52,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 18:36:52,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 18:36:52,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 18:36:52,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 18:36:52,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 18:36:52,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 18:36:52,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 18:36:52,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 18:36:52,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 18:36:52,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 18:36:52,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 18:36:52,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 18:36:52,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 18:36:52,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 18:36:52,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 18:36:52,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 18:36:52,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 18:36:52,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 18:36:52,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 18:36:52,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 18:36:52,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 18:36:52,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 18:36:52,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 18:36:52,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 18:36:52,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 18:36:52,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 18:36:52,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 18:36:52,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 18:36:52,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 18:36:52,838 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 18:36:52,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 18:36:52,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 18:36:52,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 18:36:52,843 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 18:36:52,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 18:36:52,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 18:36:52,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 18:36:52,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 18:36:52,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 18:36:52,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 18:36:52,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 18:36:52,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 18:36:52,845 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 18:36:52,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 18:36:52,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 18:36:52,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 18:36:52,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 18:36:52,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 18:36:52,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 18:36:52,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 18:36:52,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:36:52,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 18:36:52,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 18:36:52,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 18:36:52,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 18:36:52,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 18:36:52,847 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 18:36:52,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 18:36:52,847 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 18:36:52,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 18:36:53,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 18:36:53,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 18:36:53,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 18:36:53,141 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-06 18:36:53,141 INFO L275 PluginConnector]: CDTParser initialized [2021-08-06 18:36:53,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2021-08-06 18:36:53,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044799087/f2724b773829417fb1a239025a1cc73d/FLAG05848d2c6 [2021-08-06 18:36:53,737 INFO L306 CDTParser]: Found 1 translation units. [2021-08-06 18:36:53,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2021-08-06 18:36:53,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044799087/f2724b773829417fb1a239025a1cc73d/FLAG05848d2c6 [2021-08-06 18:36:54,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044799087/f2724b773829417fb1a239025a1cc73d [2021-08-06 18:36:54,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 18:36:54,202 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-06 18:36:54,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-06 18:36:54,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-06 18:36:54,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-06 18:36:54,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229d1798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54, skipping insertion in model container [2021-08-06 18:36:54,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-06 18:36:54,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-06 18:36:54,558 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2021-08-06 18:36:54,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:36:54,605 INFO L203 MainTranslator]: Completed pre-run [2021-08-06 18:36:54,671 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2021-08-06 18:36:54,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:36:54,746 INFO L208 MainTranslator]: Completed translation [2021-08-06 18:36:54,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54 WrapperNode [2021-08-06 18:36:54,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-06 18:36:54,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 18:36:54,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 18:36:54,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 18:36:54,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 18:36:54,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 18:36:54,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 18:36:54,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 18:36:54,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 18:36:54,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 18:36:54,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 18:36:54,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 18:36:54,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (1/1) ... [2021-08-06 18:36:54,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:36:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:54,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 18:36:54,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 18:36:54,929 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-06 18:36:54,930 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-06 18:36:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-06 18:36:54,931 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-06 18:36:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-06 18:36:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-06 18:36:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-06 18:36:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-06 18:36:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-08-06 18:36:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-06 18:36:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 18:36:54,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 18:36:54,933 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 18:36:55,505 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 18:36:55,505 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-08-06 18:36:55,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:36:55 BoogieIcfgContainer [2021-08-06 18:36:55,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 18:36:55,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 18:36:55,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 18:36:55,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 18:36:55,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.08 06:36:54" (1/3) ... [2021-08-06 18:36:55,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169301cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:36:55, skipping insertion in model container [2021-08-06 18:36:55,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:36:54" (2/3) ... [2021-08-06 18:36:55,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169301cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:36:55, skipping insertion in model container [2021-08-06 18:36:55,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:36:55" (3/3) ... [2021-08-06 18:36:55,513 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2021-08-06 18:36:55,517 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 18:36:55,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 18:36:55,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-06 18:36:55,518 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 18:36:55,548 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,548 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,548 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,548 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,549 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,549 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,549 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,549 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,549 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,549 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,549 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,550 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,550 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,550 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,550 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,550 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,550 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,551 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,551 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,551 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,551 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,551 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,551 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,552 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,552 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,552 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,552 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,552 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,552 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,552 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,553 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,553 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,553 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,553 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,553 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,553 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,554 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,554 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,557 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,557 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,557 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,557 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,557 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,584 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,586 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,586 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,586 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,590 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,590 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,590 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,590 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,591 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,591 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,592 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,593 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,593 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,593 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,594 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,595 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,595 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,595 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,595 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,595 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,596 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,597 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,597 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,597 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,597 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,598 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,599 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,599 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,599 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,599 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,599 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,599 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,599 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,599 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,599 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,600 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,601 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,602 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,603 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,604 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,605 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,606 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,608 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,609 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,610 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,610 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,610 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,610 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,610 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,614 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,618 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,618 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,618 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,618 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,618 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,618 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,619 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,619 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,619 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,619 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,619 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,619 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,619 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,619 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,619 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,620 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,620 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:36:55,626 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 18:36:55,658 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t1Thread1of1ForFork1 ======== [2021-08-06 18:36:55,663 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 18:36:55,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-06 18:36:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 9090 states, 8763 states have (on average 1.3099395184297615) internal successors, (11479), 9089 states have internal predecessors, (11479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 18:36:56,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:56,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:36:56,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:36:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:56,324 INFO L82 PathProgramCache]: Analyzing trace with hash 198346269, now seen corresponding path program 1 times [2021-08-06 18:36:56,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:56,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770164778] [2021-08-06 18:36:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:56,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:56,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:56,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770164778] [2021-08-06 18:36:56,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770164778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:36:56,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:36:56,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 18:36:56,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577291062] [2021-08-06 18:36:56,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 18:36:56,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:56,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 18:36:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 18:36:56,640 INFO L87 Difference]: Start difference. First operand has 9090 states, 8763 states have (on average 1.3099395184297615) internal successors, (11479), 9089 states have internal predecessors, (11479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) [2021-08-06 18:36:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:56,781 INFO L93 Difference]: Finished difference Result 13194 states and 15930 transitions. [2021-08-06 18:36:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 18:36:56,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) Word has length 54 [2021-08-06 18:36:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:56,847 INFO L225 Difference]: With dead ends: 13194 [2021-08-06 18:36:56,847 INFO L226 Difference]: Without dead ends: 10197 [2021-08-06 18:36:56,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 18:36:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10197 states. [2021-08-06 18:36:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10197 to 8973. [2021-08-06 18:36:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8965 states have (on average 1.2558839933073063) internal successors, (11259), 8972 states have internal predecessors, (11259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 11259 transitions. [2021-08-06 18:36:57,211 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 11259 transitions. Word has length 54 [2021-08-06 18:36:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:57,213 INFO L470 AbstractCegarLoop]: Abstraction has 8973 states and 11259 transitions. [2021-08-06 18:36:57,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) [2021-08-06 18:36:57,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 11259 transitions. [2021-08-06 18:36:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-06 18:36:57,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:57,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:36:57,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 18:36:57,221 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:36:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1090071929, now seen corresponding path program 1 times [2021-08-06 18:36:57,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:57,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335903592] [2021-08-06 18:36:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:57,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:57,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:57,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335903592] [2021-08-06 18:36:57,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335903592] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:36:57,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:36:57,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 18:36:57,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470911487] [2021-08-06 18:36:57,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 18:36:57,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:57,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 18:36:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 18:36:57,328 INFO L87 Difference]: Start difference. First operand 8973 states and 11259 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:57,417 INFO L93 Difference]: Finished difference Result 12413 states and 15581 transitions. [2021-08-06 18:36:57,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 18:36:57,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-06 18:36:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:57,465 INFO L225 Difference]: With dead ends: 12413 [2021-08-06 18:36:57,465 INFO L226 Difference]: Without dead ends: 12413 [2021-08-06 18:36:57,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 18:36:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12413 states. [2021-08-06 18:36:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12413 to 9489. [2021-08-06 18:36:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9489 states, 9481 states have (on average 1.2560911296276764) internal successors, (11909), 9488 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:57,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9489 states to 9489 states and 11909 transitions. [2021-08-06 18:36:57,724 INFO L78 Accepts]: Start accepts. Automaton has 9489 states and 11909 transitions. Word has length 63 [2021-08-06 18:36:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:57,726 INFO L470 AbstractCegarLoop]: Abstraction has 9489 states and 11909 transitions. [2021-08-06 18:36:57,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 9489 states and 11909 transitions. [2021-08-06 18:36:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 18:36:57,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:57,740 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:36:57,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 18:36:57,741 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:36:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash -828696007, now seen corresponding path program 1 times [2021-08-06 18:36:57,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:57,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362537665] [2021-08-06 18:36:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:57,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:57,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:57,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362537665] [2021-08-06 18:36:57,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362537665] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:36:57,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:36:57,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 18:36:57,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355394150] [2021-08-06 18:36:57,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 18:36:57,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 18:36:57,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 18:36:57,969 INFO L87 Difference]: Start difference. First operand 9489 states and 11909 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:58,113 INFO L93 Difference]: Finished difference Result 15956 states and 19559 transitions. [2021-08-06 18:36:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 18:36:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-06 18:36:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:58,176 INFO L225 Difference]: With dead ends: 15956 [2021-08-06 18:36:58,177 INFO L226 Difference]: Without dead ends: 15956 [2021-08-06 18:36:58,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:36:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15956 states. [2021-08-06 18:36:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15956 to 10791. [2021-08-06 18:36:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10791 states, 10783 states have (on average 1.2510433089121766) internal successors, (13490), 10790 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10791 states to 10791 states and 13490 transitions. [2021-08-06 18:36:58,456 INFO L78 Accepts]: Start accepts. Automaton has 10791 states and 13490 transitions. Word has length 80 [2021-08-06 18:36:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:58,456 INFO L470 AbstractCegarLoop]: Abstraction has 10791 states and 13490 transitions. [2021-08-06 18:36:58,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 10791 states and 13490 transitions. [2021-08-06 18:36:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-06 18:36:58,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:58,469 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:36:58,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 18:36:58,470 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:36:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1993787743, now seen corresponding path program 1 times [2021-08-06 18:36:58,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:58,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296110939] [2021-08-06 18:36:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:58,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:58,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:58,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296110939] [2021-08-06 18:36:58,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296110939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:58,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512181085] [2021-08-06 18:36:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:58,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:58,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:58,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 18:36:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 18:36:58,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:59,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:36:59,349 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:36:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:59,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512181085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:59,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:59,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 18:36:59,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113210580] [2021-08-06 18:36:59,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:36:59,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:59,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:36:59,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:36:59,399 INFO L87 Difference]: Start difference. First operand 10791 states and 13490 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 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) [2021-08-06 18:36:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:59,508 INFO L93 Difference]: Finished difference Result 16179 states and 20169 transitions. [2021-08-06 18:36:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 18:36:59,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 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) Word has length 89 [2021-08-06 18:36:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:59,544 INFO L225 Difference]: With dead ends: 16179 [2021-08-06 18:36:59,544 INFO L226 Difference]: Without dead ends: 16179 [2021-08-06 18:36:59,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:36:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16179 states. [2021-08-06 18:36:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16179 to 14693. [2021-08-06 18:36:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14693 states, 14685 states have (on average 1.2467143343547837) internal successors, (18308), 14692 states have internal predecessors, (18308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14693 states to 14693 states and 18308 transitions. [2021-08-06 18:36:59,865 INFO L78 Accepts]: Start accepts. Automaton has 14693 states and 18308 transitions. Word has length 89 [2021-08-06 18:36:59,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:59,865 INFO L470 AbstractCegarLoop]: Abstraction has 14693 states and 18308 transitions. [2021-08-06 18:36:59,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 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) [2021-08-06 18:36:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 14693 states and 18308 transitions. [2021-08-06 18:36:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-06 18:36:59,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:59,891 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:36:59,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:00,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:00,105 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1079786925, now seen corresponding path program 1 times [2021-08-06 18:37:00,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:00,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809242306] [2021-08-06 18:37:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:00,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 18:37:00,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:00,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809242306] [2021-08-06 18:37:00,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809242306] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:37:00,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:37:00,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 18:37:00,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120518996] [2021-08-06 18:37:00,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 18:37:00,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 18:37:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 18:37:00,168 INFO L87 Difference]: Start difference. First operand 14693 states and 18308 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:00,196 INFO L93 Difference]: Finished difference Result 5385 states and 6352 transitions. [2021-08-06 18:37:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 18:37:00,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-06 18:37:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:00,205 INFO L225 Difference]: With dead ends: 5385 [2021-08-06 18:37:00,205 INFO L226 Difference]: Without dead ends: 3865 [2021-08-06 18:37:00,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 18:37:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3865 states. [2021-08-06 18:37:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3865 to 3785. [2021-08-06 18:37:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3777 states have (on average 1.1903627217368282) internal successors, (4496), 3784 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 4496 transitions. [2021-08-06 18:37:00,266 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 4496 transitions. Word has length 115 [2021-08-06 18:37:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:00,267 INFO L470 AbstractCegarLoop]: Abstraction has 3785 states and 4496 transitions. [2021-08-06 18:37:00,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 4496 transitions. [2021-08-06 18:37:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-06 18:37:00,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:00,276 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:00,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 18:37:00,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:00,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1855967523, now seen corresponding path program 2 times [2021-08-06 18:37:00,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:00,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139012003] [2021-08-06 18:37:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:00,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:00,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:00,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139012003] [2021-08-06 18:37:00,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139012003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:00,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247174222] [2021-08-06 18:37:00,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:37:00,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:00,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:00,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:00,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 18:37:00,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:37:00,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:00,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 18:37:00,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:01,319 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:01,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:01,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247174222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:01,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:01,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 18:37:01,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394917051] [2021-08-06 18:37:01,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 18:37:01,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:01,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 18:37:01,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:37:01,357 INFO L87 Difference]: Start difference. First operand 3785 states and 4496 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:01,453 INFO L93 Difference]: Finished difference Result 5520 states and 6557 transitions. [2021-08-06 18:37:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 18:37:01,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-08-06 18:37:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:01,464 INFO L225 Difference]: With dead ends: 5520 [2021-08-06 18:37:01,464 INFO L226 Difference]: Without dead ends: 5520 [2021-08-06 18:37:01,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:37:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5520 states. [2021-08-06 18:37:01,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5520 to 5135. [2021-08-06 18:37:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5135 states, 5127 states have (on average 1.1897795982055783) internal successors, (6100), 5134 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5135 states to 5135 states and 6100 transitions. [2021-08-06 18:37:01,546 INFO L78 Accepts]: Start accepts. Automaton has 5135 states and 6100 transitions. Word has length 124 [2021-08-06 18:37:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:01,546 INFO L470 AbstractCegarLoop]: Abstraction has 5135 states and 6100 transitions. [2021-08-06 18:37:01,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand 5135 states and 6100 transitions. [2021-08-06 18:37:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-08-06 18:37:01,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:01,555 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:01,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:01,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-06 18:37:01,774 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:01,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1226845667, now seen corresponding path program 1 times [2021-08-06 18:37:01,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:01,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923818226] [2021-08-06 18:37:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:01,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:01,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:01,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923818226] [2021-08-06 18:37:01,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923818226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:01,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175799279] [2021-08-06 18:37:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:01,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:01,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:01,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:01,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 18:37:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 18:37:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:02,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:02,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 18:37:02,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175799279] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:37:02,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 18:37:02,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2021-08-06 18:37:02,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954004238] [2021-08-06 18:37:02,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 18:37:02,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 18:37:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:37:02,960 INFO L87 Difference]: Start difference. First operand 5135 states and 6100 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2021-08-06 18:37:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:03,048 INFO L93 Difference]: Finished difference Result 7171 states and 8478 transitions. [2021-08-06 18:37:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 18:37:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) Word has length 129 [2021-08-06 18:37:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:03,062 INFO L225 Difference]: With dead ends: 7171 [2021-08-06 18:37:03,062 INFO L226 Difference]: Without dead ends: 7171 [2021-08-06 18:37:03,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:37:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7171 states. [2021-08-06 18:37:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7171 to 6475. [2021-08-06 18:37:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6475 states, 6467 states have (on average 1.1968455234266275) internal successors, (7740), 6474 states have internal predecessors, (7740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6475 states to 6475 states and 7740 transitions. [2021-08-06 18:37:03,149 INFO L78 Accepts]: Start accepts. Automaton has 6475 states and 7740 transitions. Word has length 129 [2021-08-06 18:37:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:03,150 INFO L470 AbstractCegarLoop]: Abstraction has 6475 states and 7740 transitions. [2021-08-06 18:37:03,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2021-08-06 18:37:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 6475 states and 7740 transitions. [2021-08-06 18:37:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-06 18:37:03,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:03,162 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:03,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:03,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:03,374 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1970116449, now seen corresponding path program 3 times [2021-08-06 18:37:03,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:03,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942822384] [2021-08-06 18:37:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:03,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:03,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:03,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942822384] [2021-08-06 18:37:03,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942822384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:03,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101060683] [2021-08-06 18:37:03,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:37:03,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:03,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:03,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 18:37:03,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:37:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 18:37:03,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:04,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:04,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:04,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101060683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:04,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:04,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-06 18:37:04,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584171190] [2021-08-06 18:37:04,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 18:37:04,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 18:37:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:37:04,747 INFO L87 Difference]: Start difference. First operand 6475 states and 7740 transitions. Second operand has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:04,878 INFO L93 Difference]: Finished difference Result 8789 states and 10409 transitions. [2021-08-06 18:37:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 18:37:04,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-08-06 18:37:04,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:04,914 INFO L225 Difference]: With dead ends: 8789 [2021-08-06 18:37:04,914 INFO L226 Difference]: Without dead ends: 8789 [2021-08-06 18:37:04,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:37:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8789 states. [2021-08-06 18:37:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8789 to 7825. [2021-08-06 18:37:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 7817 states have (on average 1.1953434821542792) internal successors, (9344), 7824 states have internal predecessors, (9344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 9344 transitions. [2021-08-06 18:37:05,026 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 9344 transitions. Word has length 159 [2021-08-06 18:37:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:05,026 INFO L470 AbstractCegarLoop]: Abstraction has 7825 states and 9344 transitions. [2021-08-06 18:37:05,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 9344 transitions. [2021-08-06 18:37:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-08-06 18:37:05,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:05,039 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:05,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:05,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:05,253 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:05,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:05,253 INFO L82 PathProgramCache]: Analyzing trace with hash -387236549, now seen corresponding path program 2 times [2021-08-06 18:37:05,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:05,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973914595] [2021-08-06 18:37:05,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:05,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 18:37:05,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:05,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973914595] [2021-08-06 18:37:05,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973914595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:05,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285792438] [2021-08-06 18:37:05,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:37:05,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:05,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:05,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:05,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 18:37:05,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:37:05,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 18:37:05,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:06,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:06,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 18:37:06,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285792438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:06,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:06,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 18:37:06,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724939363] [2021-08-06 18:37:06,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:37:06,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:06,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:37:06,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:37:06,673 INFO L87 Difference]: Start difference. First operand 7825 states and 9344 transitions. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:06,827 INFO L93 Difference]: Finished difference Result 10440 states and 12330 transitions. [2021-08-06 18:37:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:37:06,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-08-06 18:37:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:06,844 INFO L225 Difference]: With dead ends: 10440 [2021-08-06 18:37:06,845 INFO L226 Difference]: Without dead ends: 10440 [2021-08-06 18:37:06,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:37:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2021-08-06 18:37:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 7825. [2021-08-06 18:37:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 7817 states have (on average 1.1953434821542792) internal successors, (9344), 7824 states have internal predecessors, (9344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 9344 transitions. [2021-08-06 18:37:06,983 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 9344 transitions. Word has length 164 [2021-08-06 18:37:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:06,984 INFO L470 AbstractCegarLoop]: Abstraction has 7825 states and 9344 transitions. [2021-08-06 18:37:06,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 9344 transitions. [2021-08-06 18:37:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-08-06 18:37:07,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:07,000 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:07,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-06 18:37:07,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:07,225 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:07,226 INFO L82 PathProgramCache]: Analyzing trace with hash 529942429, now seen corresponding path program 4 times [2021-08-06 18:37:07,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:07,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488154172] [2021-08-06 18:37:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:07,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:07,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:07,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488154172] [2021-08-06 18:37:07,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488154172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:07,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324336740] [2021-08-06 18:37:07,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:37:07,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:07,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:07,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:07,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 18:37:07,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:37:07,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:37:07,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:08,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:08,923 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:08,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324336740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:08,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:08,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-06 18:37:08,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639584474] [2021-08-06 18:37:08,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:37:08,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:08,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:37:08,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:37:08,950 INFO L87 Difference]: Start difference. First operand 7825 states and 9344 transitions. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:09,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:09,111 INFO L93 Difference]: Finished difference Result 10219 states and 12109 transitions. [2021-08-06 18:37:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:37:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-08-06 18:37:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:09,131 INFO L225 Difference]: With dead ends: 10219 [2021-08-06 18:37:09,131 INFO L226 Difference]: Without dead ends: 10219 [2021-08-06 18:37:09,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:37:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10219 states. [2021-08-06 18:37:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10219 to 9175. [2021-08-06 18:37:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9175 states, 9167 states have (on average 1.1942838442238464) internal successors, (10948), 9174 states have internal predecessors, (10948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9175 states to 9175 states and 10948 transitions. [2021-08-06 18:37:09,268 INFO L78 Accepts]: Start accepts. Automaton has 9175 states and 10948 transitions. Word has length 194 [2021-08-06 18:37:09,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:09,269 INFO L470 AbstractCegarLoop]: Abstraction has 9175 states and 10948 transitions. [2021-08-06 18:37:09,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 9175 states and 10948 transitions. [2021-08-06 18:37:09,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-08-06 18:37:09,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:09,288 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:09,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:09,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:09,501 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:09,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:09,501 INFO L82 PathProgramCache]: Analyzing trace with hash 782842403, now seen corresponding path program 3 times [2021-08-06 18:37:09,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:09,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816270278] [2021-08-06 18:37:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:09,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 142 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 18:37:09,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:09,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816270278] [2021-08-06 18:37:09,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816270278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:09,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548075903] [2021-08-06 18:37:09,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:37:09,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:09,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:09,656 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:09,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 18:37:10,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:37:10,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:37:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:11,232 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:11,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 118 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:37:11,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548075903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:11,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:11,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-08-06 18:37:11,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155992810] [2021-08-06 18:37:11,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:37:11,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:11,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:37:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:37:11,263 INFO L87 Difference]: Start difference. First operand 9175 states and 10948 transitions. Second operand has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:11,426 INFO L93 Difference]: Finished difference Result 12271 states and 14552 transitions. [2021-08-06 18:37:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 18:37:11,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-08-06 18:37:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:11,439 INFO L225 Difference]: With dead ends: 12271 [2021-08-06 18:37:11,440 INFO L226 Difference]: Without dead ends: 12271 [2021-08-06 18:37:11,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:37:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12271 states. [2021-08-06 18:37:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12271 to 10515. [2021-08-06 18:37:11,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10515 states, 10507 states have (on average 1.1980584372323213) internal successors, (12588), 10514 states have internal predecessors, (12588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10515 states to 10515 states and 12588 transitions. [2021-08-06 18:37:11,583 INFO L78 Accepts]: Start accepts. Automaton has 10515 states and 12588 transitions. Word has length 199 [2021-08-06 18:37:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:11,584 INFO L470 AbstractCegarLoop]: Abstraction has 10515 states and 12588 transitions. [2021-08-06 18:37:11,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 10515 states and 12588 transitions. [2021-08-06 18:37:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-08-06 18:37:11,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:11,599 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:11,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:11,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:11,817 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1195978467, now seen corresponding path program 4 times [2021-08-06 18:37:11,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:11,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823309740] [2021-08-06 18:37:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:11,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 135 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 18:37:11,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:11,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823309740] [2021-08-06 18:37:11,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823309740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:11,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755846591] [2021-08-06 18:37:11,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:37:11,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:11,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:11,957 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:11,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 18:37:12,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:37:12,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:12,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:37:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:13,642 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:13,642 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 135 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 18:37:13,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755846591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:13,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:13,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-06 18:37:13,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152924805] [2021-08-06 18:37:13,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:37:13,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:13,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:37:13,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:37:13,676 INFO L87 Difference]: Start difference. First operand 10515 states and 12588 transitions. Second operand has 12 states, 12 states have (on average 19.75) internal successors, (237), 12 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:13,844 INFO L93 Difference]: Finished difference Result 13290 states and 15766 transitions. [2021-08-06 18:37:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:37:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.75) internal successors, (237), 12 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-08-06 18:37:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:13,860 INFO L225 Difference]: With dead ends: 13290 [2021-08-06 18:37:13,860 INFO L226 Difference]: Without dead ends: 13290 [2021-08-06 18:37:13,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:37:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13290 states. [2021-08-06 18:37:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13290 to 10515. [2021-08-06 18:37:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10515 states, 10507 states have (on average 1.1980584372323213) internal successors, (12588), 10514 states have internal predecessors, (12588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10515 states to 10515 states and 12588 transitions. [2021-08-06 18:37:13,984 INFO L78 Accepts]: Start accepts. Automaton has 10515 states and 12588 transitions. Word has length 199 [2021-08-06 18:37:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:13,984 INFO L470 AbstractCegarLoop]: Abstraction has 10515 states and 12588 transitions. [2021-08-06 18:37:13,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.75) internal successors, (237), 12 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 10515 states and 12588 transitions. [2021-08-06 18:37:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-08-06 18:37:14,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:14,000 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:14,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:14,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-06 18:37:14,217 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1028626399, now seen corresponding path program 5 times [2021-08-06 18:37:14,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:14,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133960925] [2021-08-06 18:37:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:14,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:14,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:14,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133960925] [2021-08-06 18:37:14,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133960925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:14,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533104085] [2021-08-06 18:37:14,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:37:14,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:14,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:14,377 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:14,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 18:37:15,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 18:37:15,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:15,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:37:15,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:16,151 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:16,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:16,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533104085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:16,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:16,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-06 18:37:16,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227092876] [2021-08-06 18:37:16,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:37:16,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:16,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:37:16,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:37:16,181 INFO L87 Difference]: Start difference. First operand 10515 states and 12588 transitions. Second operand has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:16,413 INFO L93 Difference]: Finished difference Result 13889 states and 16483 transitions. [2021-08-06 18:37:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:37:16,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-08-06 18:37:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:16,430 INFO L225 Difference]: With dead ends: 13889 [2021-08-06 18:37:16,431 INFO L226 Difference]: Without dead ends: 13889 [2021-08-06 18:37:16,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:37:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2021-08-06 18:37:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 11865. [2021-08-06 18:37:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11865 states, 11857 states have (on average 1.1969300834949819) internal successors, (14192), 11864 states have internal predecessors, (14192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11865 states to 11865 states and 14192 transitions. [2021-08-06 18:37:16,549 INFO L78 Accepts]: Start accepts. Automaton has 11865 states and 14192 transitions. Word has length 229 [2021-08-06 18:37:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:16,550 INFO L470 AbstractCegarLoop]: Abstraction has 11865 states and 14192 transitions. [2021-08-06 18:37:16,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 11865 states and 14192 transitions. [2021-08-06 18:37:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-08-06 18:37:16,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:16,561 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:16,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:16,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 18:37:16,762 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:16,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1957649128, now seen corresponding path program 1 times [2021-08-06 18:37:16,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:16,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482931501] [2021-08-06 18:37:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:16,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 9 proven. 158 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-06 18:37:16,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:16,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482931501] [2021-08-06 18:37:16,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482931501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:16,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507792409] [2021-08-06 18:37:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:16,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:16,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:16,911 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:16,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 18:37:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:37:17,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:18,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:18,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 9 proven. 134 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-08-06 18:37:18,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507792409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:18,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:18,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-08-06 18:37:18,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71152415] [2021-08-06 18:37:18,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 18:37:18,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:18,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 18:37:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:37:18,836 INFO L87 Difference]: Start difference. First operand 11865 states and 14192 transitions. Second operand has 11 states, 11 states have (on average 21.727272727272727) internal successors, (239), 11 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:19,015 INFO L93 Difference]: Finished difference Result 19799 states and 23463 transitions. [2021-08-06 18:37:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 18:37:19,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.727272727272727) internal successors, (239), 11 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-08-06 18:37:19,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:19,036 INFO L225 Difference]: With dead ends: 19799 [2021-08-06 18:37:19,037 INFO L226 Difference]: Without dead ends: 19799 [2021-08-06 18:37:19,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:37:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19799 states. [2021-08-06 18:37:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19799 to 12725. [2021-08-06 18:37:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12725 states, 12717 states have (on average 1.1995753715498938) internal successors, (15255), 12724 states have internal predecessors, (15255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12725 states to 12725 states and 15255 transitions. [2021-08-06 18:37:19,186 INFO L78 Accepts]: Start accepts. Automaton has 12725 states and 15255 transitions. Word has length 233 [2021-08-06 18:37:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:19,186 INFO L470 AbstractCegarLoop]: Abstraction has 12725 states and 15255 transitions. [2021-08-06 18:37:19,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.727272727272727) internal successors, (239), 11 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 12725 states and 15255 transitions. [2021-08-06 18:37:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-08-06 18:37:19,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:19,203 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:19,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:19,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 18:37:19,417 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:19,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1633609625, now seen corresponding path program 5 times [2021-08-06 18:37:19,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:19,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373766498] [2021-08-06 18:37:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:19,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 262 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 18:37:19,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:19,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373766498] [2021-08-06 18:37:19,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373766498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:19,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996468189] [2021-08-06 18:37:19,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:37:19,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:19,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:19,589 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:19,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 18:37:20,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:37:20,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:20,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:37:20,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:21,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:21,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 238 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:37:21,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996468189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:21,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:21,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-08-06 18:37:21,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083059472] [2021-08-06 18:37:21,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:37:21,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:37:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:37:21,641 INFO L87 Difference]: Start difference. First operand 12725 states and 15255 transitions. Second operand has 12 states, 12 states have (on average 21.166666666666668) internal successors, (254), 12 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:21,836 INFO L93 Difference]: Finished difference Result 17029 states and 20217 transitions. [2021-08-06 18:37:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:37:21,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.166666666666668) internal successors, (254), 12 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-08-06 18:37:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:21,895 INFO L225 Difference]: With dead ends: 17029 [2021-08-06 18:37:21,895 INFO L226 Difference]: Without dead ends: 17029 [2021-08-06 18:37:21,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-08-06 18:37:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17029 states. [2021-08-06 18:37:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17029 to 14665. [2021-08-06 18:37:22,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14665 states, 14657 states have (on average 1.2027700075049463) internal successors, (17629), 14664 states have internal predecessors, (17629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14665 states to 14665 states and 17629 transitions. [2021-08-06 18:37:22,023 INFO L78 Accepts]: Start accepts. Automaton has 14665 states and 17629 transitions. Word has length 234 [2021-08-06 18:37:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:22,024 INFO L470 AbstractCegarLoop]: Abstraction has 14665 states and 17629 transitions. [2021-08-06 18:37:22,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.166666666666668) internal successors, (254), 12 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 14665 states and 17629 transitions. [2021-08-06 18:37:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-08-06 18:37:22,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:22,044 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:22,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:22,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 18:37:22,269 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1488627579, now seen corresponding path program 6 times [2021-08-06 18:37:22,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:22,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745008118] [2021-08-06 18:37:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:22,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 238 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:37:22,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:22,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745008118] [2021-08-06 18:37:22,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745008118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:22,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385752969] [2021-08-06 18:37:22,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:37:22,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:22,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:22,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:22,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 18:37:23,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:37:23,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:23,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:37:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:24,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:24,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 238 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:37:24,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385752969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:24,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:24,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-06 18:37:24,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251268512] [2021-08-06 18:37:24,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:37:24,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:37:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:37:24,489 INFO L87 Difference]: Start difference. First operand 14665 states and 17629 transitions. Second operand has 12 states, 12 states have (on average 21.166666666666668) internal successors, (254), 12 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:24,697 INFO L93 Difference]: Finished difference Result 21804 states and 25781 transitions. [2021-08-06 18:37:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 18:37:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.166666666666668) internal successors, (254), 12 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-08-06 18:37:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:24,723 INFO L225 Difference]: With dead ends: 21804 [2021-08-06 18:37:24,723 INFO L226 Difference]: Without dead ends: 21804 [2021-08-06 18:37:24,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:37:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21804 states. [2021-08-06 18:37:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21804 to 16005. [2021-08-06 18:37:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16005 states, 15997 states have (on average 1.2045383509408014) internal successors, (19269), 16004 states have internal predecessors, (19269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16005 states to 16005 states and 19269 transitions. [2021-08-06 18:37:24,910 INFO L78 Accepts]: Start accepts. Automaton has 16005 states and 19269 transitions. Word has length 234 [2021-08-06 18:37:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:24,911 INFO L470 AbstractCegarLoop]: Abstraction has 16005 states and 19269 transitions. [2021-08-06 18:37:24,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.166666666666668) internal successors, (254), 12 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 16005 states and 19269 transitions. [2021-08-06 18:37:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-08-06 18:37:24,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:24,933 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:24,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:25,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 18:37:25,139 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1901763643, now seen corresponding path program 7 times [2021-08-06 18:37:25,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:25,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726821526] [2021-08-06 18:37:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:25,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 18:37:25,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:25,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726821526] [2021-08-06 18:37:25,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726821526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:25,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674821317] [2021-08-06 18:37:25,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:37:25,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:25,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:25,301 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:25,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 18:37:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:26,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:37:26,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:27,429 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:27,430 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 18:37:27,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674821317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:27,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:27,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-06 18:37:27,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853912788] [2021-08-06 18:37:27,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:37:27,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:37:27,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:37:27,458 INFO L87 Difference]: Start difference. First operand 16005 states and 19269 transitions. Second operand has 14 states, 14 states have (on average 19.428571428571427) internal successors, (272), 14 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:27,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:27,757 INFO L93 Difference]: Finished difference Result 21512 states and 25563 transitions. [2021-08-06 18:37:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:37:27,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.428571428571427) internal successors, (272), 14 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-08-06 18:37:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:27,783 INFO L225 Difference]: With dead ends: 21512 [2021-08-06 18:37:27,783 INFO L226 Difference]: Without dead ends: 21512 [2021-08-06 18:37:27,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-08-06 18:37:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21512 states. [2021-08-06 18:37:27,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21512 to 16005. [2021-08-06 18:37:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16005 states, 15997 states have (on average 1.2045383509408014) internal successors, (19269), 16004 states have internal predecessors, (19269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16005 states to 16005 states and 19269 transitions. [2021-08-06 18:37:28,004 INFO L78 Accepts]: Start accepts. Automaton has 16005 states and 19269 transitions. Word has length 234 [2021-08-06 18:37:28,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:28,004 INFO L470 AbstractCegarLoop]: Abstraction has 16005 states and 19269 transitions. [2021-08-06 18:37:28,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.428571428571427) internal successors, (272), 14 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:28,004 INFO L276 IsEmpty]: Start isEmpty. Operand 16005 states and 19269 transitions. [2021-08-06 18:37:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-08-06 18:37:28,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:28,022 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:28,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:28,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 18:37:28,222 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:28,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1994444893, now seen corresponding path program 6 times [2021-08-06 18:37:28,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:28,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872343973] [2021-08-06 18:37:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:28,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:28,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:28,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872343973] [2021-08-06 18:37:28,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872343973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:28,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521908564] [2021-08-06 18:37:28,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:37:28,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:28,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:28,436 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:28,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 18:37:29,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 18:37:29,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:29,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:30,862 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:30,863 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:30,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521908564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:30,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:30,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-06 18:37:30,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074953475] [2021-08-06 18:37:30,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:37:30,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:37:30,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:37:30,890 INFO L87 Difference]: Start difference. First operand 16005 states and 19269 transitions. Second operand has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:31,142 INFO L93 Difference]: Finished difference Result 19759 states and 23560 transitions. [2021-08-06 18:37:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:37:31,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-08-06 18:37:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:31,169 INFO L225 Difference]: With dead ends: 19759 [2021-08-06 18:37:31,170 INFO L226 Difference]: Without dead ends: 19759 [2021-08-06 18:37:31,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:37:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19759 states. [2021-08-06 18:37:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19759 to 17355. [2021-08-06 18:37:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17355 states, 17347 states have (on average 1.2032628120136046) internal successors, (20873), 17354 states have internal predecessors, (20873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17355 states to 17355 states and 20873 transitions. [2021-08-06 18:37:31,353 INFO L78 Accepts]: Start accepts. Automaton has 17355 states and 20873 transitions. Word has length 264 [2021-08-06 18:37:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:31,353 INFO L470 AbstractCegarLoop]: Abstraction has 17355 states and 20873 transitions. [2021-08-06 18:37:31,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 17355 states and 20873 transitions. [2021-08-06 18:37:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-08-06 18:37:31,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:31,378 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:31,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:31,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:31,594 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:31,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1683871010, now seen corresponding path program 2 times [2021-08-06 18:37:31,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:31,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803092362] [2021-08-06 18:37:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:31,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 278 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-06 18:37:31,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:31,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803092362] [2021-08-06 18:37:31,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803092362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:31,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046760928] [2021-08-06 18:37:31,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:37:31,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:31,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:31,764 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:31,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 18:37:32,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:37:32,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:32,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:34,195 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:34,196 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 254 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-08-06 18:37:34,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046760928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:34,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:34,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-08-06 18:37:34,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128390370] [2021-08-06 18:37:34,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:37:34,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:37:34,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:37:34,223 INFO L87 Difference]: Start difference. First operand 17355 states and 20873 transitions. Second operand has 13 states, 13 states have (on average 21.076923076923077) internal successors, (274), 13 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:34,436 INFO L93 Difference]: Finished difference Result 26214 states and 31253 transitions. [2021-08-06 18:37:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:37:34,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.076923076923077) internal successors, (274), 13 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2021-08-06 18:37:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:34,469 INFO L225 Difference]: With dead ends: 26214 [2021-08-06 18:37:34,469 INFO L226 Difference]: Without dead ends: 26214 [2021-08-06 18:37:34,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:37:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26214 states. [2021-08-06 18:37:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26214 to 17355. [2021-08-06 18:37:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17355 states, 17347 states have (on average 1.2032628120136046) internal successors, (20873), 17354 states have internal predecessors, (20873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17355 states to 17355 states and 20873 transitions. [2021-08-06 18:37:34,719 INFO L78 Accepts]: Start accepts. Automaton has 17355 states and 20873 transitions. Word has length 268 [2021-08-06 18:37:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:34,719 INFO L470 AbstractCegarLoop]: Abstraction has 17355 states and 20873 transitions. [2021-08-06 18:37:34,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.076923076923077) internal successors, (274), 13 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 17355 states and 20873 transitions. [2021-08-06 18:37:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-08-06 18:37:34,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:34,736 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:34,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:34,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:34,937 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:34,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2124902976, now seen corresponding path program 3 times [2021-08-06 18:37:34,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:34,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041673100] [2021-08-06 18:37:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:34,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 254 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-08-06 18:37:35,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:35,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041673100] [2021-08-06 18:37:35,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041673100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:35,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188669727] [2021-08-06 18:37:35,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:37:35,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:35,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:35,110 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:35,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 18:37:36,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 18:37:36,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:36,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:37:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-08-06 18:37:37,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188669727] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:37:37,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 18:37:37,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-08-06 18:37:37,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308622206] [2021-08-06 18:37:37,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 18:37:37,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 18:37:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:37:37,710 INFO L87 Difference]: Start difference. First operand 17355 states and 20873 transitions. Second operand has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:37,848 INFO L93 Difference]: Finished difference Result 23567 states and 28142 transitions. [2021-08-06 18:37:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 18:37:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2021-08-06 18:37:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:37,876 INFO L225 Difference]: With dead ends: 23567 [2021-08-06 18:37:37,876 INFO L226 Difference]: Without dead ends: 23567 [2021-08-06 18:37:37,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:37:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23567 states. [2021-08-06 18:37:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23567 to 18575. [2021-08-06 18:37:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18575 states, 18567 states have (on average 1.2040717401841978) internal successors, (22356), 18574 states have internal predecessors, (22356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18575 states to 18575 states and 22356 transitions. [2021-08-06 18:37:38,099 INFO L78 Accepts]: Start accepts. Automaton has 18575 states and 22356 transitions. Word has length 268 [2021-08-06 18:37:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:38,099 INFO L470 AbstractCegarLoop]: Abstraction has 18575 states and 22356 transitions. [2021-08-06 18:37:38,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 18575 states and 22356 transitions. [2021-08-06 18:37:38,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-08-06 18:37:38,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:38,119 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:38,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:38,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:38,320 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:38,320 INFO L82 PathProgramCache]: Analyzing trace with hash 415635043, now seen corresponding path program 8 times [2021-08-06 18:37:38,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:38,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148697452] [2021-08-06 18:37:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:38,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 417 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 18:37:38,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:38,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148697452] [2021-08-06 18:37:38,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148697452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:38,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906794262] [2021-08-06 18:37:38,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:37:38,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:38,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:38,493 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:38,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 18:37:39,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:37:39,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:41,195 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:41,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 393 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:37:41,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906794262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:41,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:41,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-08-06 18:37:41,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275888064] [2021-08-06 18:37:41,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:37:41,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:37:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:37:41,223 INFO L87 Difference]: Start difference. First operand 18575 states and 22356 transitions. Second operand has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:41,498 INFO L93 Difference]: Finished difference Result 21999 states and 26170 transitions. [2021-08-06 18:37:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:37:41,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-08-06 18:37:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:41,526 INFO L225 Difference]: With dead ends: 21999 [2021-08-06 18:37:41,526 INFO L226 Difference]: Without dead ends: 21999 [2021-08-06 18:37:41,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-08-06 18:37:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21999 states. [2021-08-06 18:37:41,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21999 to 19175. [2021-08-06 18:37:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19175 states, 19167 states have (on average 1.2046747013095425) internal successors, (23090), 19174 states have internal predecessors, (23090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19175 states to 19175 states and 23090 transitions. [2021-08-06 18:37:41,727 INFO L78 Accepts]: Start accepts. Automaton has 19175 states and 23090 transitions. Word has length 269 [2021-08-06 18:37:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:41,727 INFO L470 AbstractCegarLoop]: Abstraction has 19175 states and 23090 transitions. [2021-08-06 18:37:41,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 19175 states and 23090 transitions. [2021-08-06 18:37:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-08-06 18:37:41,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:41,746 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:41,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:41,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:41,947 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:41,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1771455679, now seen corresponding path program 9 times [2021-08-06 18:37:41,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:41,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402953361] [2021-08-06 18:37:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:41,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 393 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:37:42,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:42,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402953361] [2021-08-06 18:37:42,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402953361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:42,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874095364] [2021-08-06 18:37:42,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:37:42,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:42,103 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:42,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 18:37:43,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 18:37:43,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:43,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:44,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:44,921 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 393 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:37:44,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874095364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:44,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:44,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-06 18:37:44,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928500723] [2021-08-06 18:37:44,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:37:44,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:44,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:37:44,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:37:44,949 INFO L87 Difference]: Start difference. First operand 19175 states and 23090 transitions. Second operand has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:45,175 INFO L93 Difference]: Finished difference Result 25535 states and 30316 transitions. [2021-08-06 18:37:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:37:45,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-08-06 18:37:45,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:45,213 INFO L225 Difference]: With dead ends: 25535 [2021-08-06 18:37:45,213 INFO L226 Difference]: Without dead ends: 25535 [2021-08-06 18:37:45,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:37:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25535 states. [2021-08-06 18:37:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25535 to 21115. [2021-08-06 18:37:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21115 states, 21107 states have (on average 1.206424408963851) internal successors, (25464), 21114 states have internal predecessors, (25464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21115 states to 21115 states and 25464 transitions. [2021-08-06 18:37:45,448 INFO L78 Accepts]: Start accepts. Automaton has 21115 states and 25464 transitions. Word has length 269 [2021-08-06 18:37:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:45,448 INFO L470 AbstractCegarLoop]: Abstraction has 21115 states and 25464 transitions. [2021-08-06 18:37:45,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 21115 states and 25464 transitions. [2021-08-06 18:37:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-08-06 18:37:45,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:45,521 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:45,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:45,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:45,722 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:45,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:45,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1916437725, now seen corresponding path program 10 times [2021-08-06 18:37:45,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:45,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647700707] [2021-08-06 18:37:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:45,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 393 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:37:45,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:45,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647700707] [2021-08-06 18:37:45,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647700707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:45,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121726874] [2021-08-06 18:37:45,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:37:45,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:45,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:45,925 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:45,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 18:37:47,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:37:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:47,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:48,838 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:48,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 393 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:37:48,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121726874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:48,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:48,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-06 18:37:48,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134676182] [2021-08-06 18:37:48,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:37:48,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:37:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:37:48,866 INFO L87 Difference]: Start difference. First operand 21115 states and 25464 transitions. Second operand has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:49,065 INFO L93 Difference]: Finished difference Result 26355 states and 31452 transitions. [2021-08-06 18:37:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:37:49,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-08-06 18:37:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:49,097 INFO L225 Difference]: With dead ends: 26355 [2021-08-06 18:37:49,097 INFO L226 Difference]: Without dead ends: 26355 [2021-08-06 18:37:49,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:37:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26355 states. [2021-08-06 18:37:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26355 to 22455. [2021-08-06 18:37:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22455 states, 22447 states have (on average 1.2074664765892993) internal successors, (27104), 22454 states have internal predecessors, (27104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22455 states to 22455 states and 27104 transitions. [2021-08-06 18:37:49,357 INFO L78 Accepts]: Start accepts. Automaton has 22455 states and 27104 transitions. Word has length 269 [2021-08-06 18:37:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:49,357 INFO L470 AbstractCegarLoop]: Abstraction has 22455 states and 27104 transitions. [2021-08-06 18:37:49,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 22455 states and 27104 transitions. [2021-08-06 18:37:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-08-06 18:37:49,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:49,381 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:49,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:49,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:49,582 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:49,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1759357153, now seen corresponding path program 7 times [2021-08-06 18:37:49,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:49,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830809778] [2021-08-06 18:37:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:49,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:49,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:49,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830809778] [2021-08-06 18:37:49,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830809778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:49,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89988537] [2021-08-06 18:37:49,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:37:49,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:49,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:49,788 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:49,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 18:37:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:51,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:37:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:53,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:53,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:53,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89988537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:53,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:53,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-06 18:37:53,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589401962] [2021-08-06 18:37:53,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:37:53,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:53,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:37:53,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:37:53,056 INFO L87 Difference]: Start difference. First operand 22455 states and 27104 transitions. Second operand has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:53,373 INFO L93 Difference]: Finished difference Result 27189 states and 32525 transitions. [2021-08-06 18:37:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:37:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 299 [2021-08-06 18:37:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:53,409 INFO L225 Difference]: With dead ends: 27189 [2021-08-06 18:37:53,410 INFO L226 Difference]: Without dead ends: 27189 [2021-08-06 18:37:53,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 18:37:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27189 states. [2021-08-06 18:37:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27189 to 23805. [2021-08-06 18:37:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23805 states, 23797 states have (on average 1.2063705509097786) internal successors, (28708), 23804 states have internal predecessors, (28708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:53,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23805 states to 23805 states and 28708 transitions. [2021-08-06 18:37:53,664 INFO L78 Accepts]: Start accepts. Automaton has 23805 states and 28708 transitions. Word has length 299 [2021-08-06 18:37:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:53,665 INFO L470 AbstractCegarLoop]: Abstraction has 23805 states and 28708 transitions. [2021-08-06 18:37:53,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 23805 states and 28708 transitions. [2021-08-06 18:37:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-08-06 18:37:53,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:53,689 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:53,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:53,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 18:37:53,890 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:53,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1017620961, now seen corresponding path program 4 times [2021-08-06 18:37:53,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:53,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594812842] [2021-08-06 18:37:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:53,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 60 proven. 226 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-08-06 18:37:54,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:54,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594812842] [2021-08-06 18:37:54,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594812842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:54,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952002430] [2021-08-06 18:37:54,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:37:54,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:54,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:54,051 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:54,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 18:37:55,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:37:55,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:37:55,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:57,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:57,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:37:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 60 proven. 226 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-08-06 18:37:57,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952002430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:57,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:57,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-06 18:37:57,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548782360] [2021-08-06 18:37:57,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:37:57,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:37:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:37:57,450 INFO L87 Difference]: Start difference. First operand 23805 states and 28708 transitions. Second operand has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 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) [2021-08-06 18:37:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:57,658 INFO L93 Difference]: Finished difference Result 34022 states and 40430 transitions. [2021-08-06 18:37:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 18:37:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 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) Word has length 302 [2021-08-06 18:37:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:57,710 INFO L225 Difference]: With dead ends: 34022 [2021-08-06 18:37:57,710 INFO L226 Difference]: Without dead ends: 34022 [2021-08-06 18:37:57,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34022 states. [2021-08-06 18:37:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34022 to 22465. [2021-08-06 18:37:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22465 states, 22457 states have (on average 1.2053257336242598) internal successors, (27068), 22464 states have internal predecessors, (27068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22465 states to 22465 states and 27068 transitions. [2021-08-06 18:37:58,065 INFO L78 Accepts]: Start accepts. Automaton has 22465 states and 27068 transitions. Word has length 302 [2021-08-06 18:37:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:58,066 INFO L470 AbstractCegarLoop]: Abstraction has 22465 states and 27068 transitions. [2021-08-06 18:37:58,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 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) [2021-08-06 18:37:58,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22465 states and 27068 transitions. [2021-08-06 18:37:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-08-06 18:37:58,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:58,089 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:58,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:58,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-06 18:37:58,289 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:37:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:58,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1498752872, now seen corresponding path program 5 times [2021-08-06 18:37:58,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:58,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931337741] [2021-08-06 18:37:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:58,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 15 proven. 413 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:37:58,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:58,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931337741] [2021-08-06 18:37:58,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931337741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:58,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465825441] [2021-08-06 18:37:58,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:37:58,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:58,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:58,457 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:58,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 18:38:00,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 18:38:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:00,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:38:00,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:01,909 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:01,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 15 proven. 389 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:38:01,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465825441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:01,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:01,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-08-06 18:38:01,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221763719] [2021-08-06 18:38:01,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:38:01,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:01,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:38:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:38:01,937 INFO L87 Difference]: Start difference. First operand 22465 states and 27068 transitions. Second operand has 13 states, 13 states have (on average 22.153846153846153) internal successors, (288), 13 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:02,171 INFO L93 Difference]: Finished difference Result 31896 states and 37881 transitions. [2021-08-06 18:38:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:38:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 22.153846153846153) internal successors, (288), 13 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2021-08-06 18:38:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:02,212 INFO L225 Difference]: With dead ends: 31896 [2021-08-06 18:38:02,212 INFO L226 Difference]: Without dead ends: 31896 [2021-08-06 18:38:02,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:38:02,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31896 states. [2021-08-06 18:38:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31896 to 24665. [2021-08-06 18:38:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24665 states, 24657 states have (on average 1.2074056048992172) internal successors, (29771), 24664 states have internal predecessors, (29771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24665 states to 24665 states and 29771 transitions. [2021-08-06 18:38:02,518 INFO L78 Accepts]: Start accepts. Automaton has 24665 states and 29771 transitions. Word has length 303 [2021-08-06 18:38:02,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:02,518 INFO L470 AbstractCegarLoop]: Abstraction has 24665 states and 29771 transitions. [2021-08-06 18:38:02,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.153846153846153) internal successors, (288), 13 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 24665 states and 29771 transitions. [2021-08-06 18:38:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-08-06 18:38:02,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:02,543 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:02,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:02,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 18:38:02,743 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:02,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1834560258, now seen corresponding path program 6 times [2021-08-06 18:38:02,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:02,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374653325] [2021-08-06 18:38:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:02,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 60 proven. 396 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 18:38:02,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:02,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374653325] [2021-08-06 18:38:02,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374653325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:02,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876074770] [2021-08-06 18:38:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:38:02,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:02,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:02,981 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:02,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 18:38:05,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:38:05,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:05,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 18:38:05,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 255 proven. 65 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-08-06 18:38:06,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876074770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:06,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:06,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-06 18:38:06,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133233318] [2021-08-06 18:38:06,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 18:38:06,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:06,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 18:38:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-06 18:38:06,552 INFO L87 Difference]: Start difference. First operand 24665 states and 29771 transitions. Second operand has 22 states, 22 states have (on average 22.318181818181817) internal successors, (491), 22 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:07,247 INFO L93 Difference]: Finished difference Result 40533 states and 48139 transitions. [2021-08-06 18:38:07,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 18:38:07,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 22.318181818181817) internal successors, (491), 22 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2021-08-06 18:38:07,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:07,318 INFO L225 Difference]: With dead ends: 40533 [2021-08-06 18:38:07,319 INFO L226 Difference]: Without dead ends: 40533 [2021-08-06 18:38:07,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 534.2ms TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 18:38:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40533 states. [2021-08-06 18:38:07,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40533 to 24717. [2021-08-06 18:38:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24717 states, 24709 states have (on average 1.207657128981343) internal successors, (29840), 24716 states have internal predecessors, (29840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24717 states to 24717 states and 29840 transitions. [2021-08-06 18:38:07,745 INFO L78 Accepts]: Start accepts. Automaton has 24717 states and 29840 transitions. Word has length 303 [2021-08-06 18:38:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:07,745 INFO L470 AbstractCegarLoop]: Abstraction has 24717 states and 29840 transitions. [2021-08-06 18:38:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.318181818181817) internal successors, (491), 22 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 24717 states and 29840 transitions. [2021-08-06 18:38:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-08-06 18:38:07,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:07,768 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:07,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:07,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:07,969 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:07,970 INFO L82 PathProgramCache]: Analyzing trace with hash -972905639, now seen corresponding path program 11 times [2021-08-06 18:38:07,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:07,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064082134] [2021-08-06 18:38:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:07,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 607 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 18:38:08,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:08,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064082134] [2021-08-06 18:38:08,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064082134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:08,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163100150] [2021-08-06 18:38:08,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:38:08,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:08,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:08,235 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:08,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 18:38:10,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 18:38:10,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:38:10,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:11,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:11,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 583 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:38:11,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163100150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:11,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:11,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-06 18:38:11,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563547346] [2021-08-06 18:38:11,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:38:11,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:38:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:38:11,925 INFO L87 Difference]: Start difference. First operand 24717 states and 29840 transitions. Second operand has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:12,198 INFO L93 Difference]: Finished difference Result 28981 states and 34542 transitions. [2021-08-06 18:38:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:38:12,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-08-06 18:38:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:12,235 INFO L225 Difference]: With dead ends: 28981 [2021-08-06 18:38:12,236 INFO L226 Difference]: Without dead ends: 28981 [2021-08-06 18:38:12,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:38:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28981 states. [2021-08-06 18:38:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28981 to 24717. [2021-08-06 18:38:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24717 states, 24709 states have (on average 1.207657128981343) internal successors, (29840), 24716 states have internal predecessors, (29840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24717 states to 24717 states and 29840 transitions. [2021-08-06 18:38:12,530 INFO L78 Accepts]: Start accepts. Automaton has 24717 states and 29840 transitions. Word has length 304 [2021-08-06 18:38:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:12,531 INFO L470 AbstractCegarLoop]: Abstraction has 24717 states and 29840 transitions. [2021-08-06 18:38:12,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 24717 states and 29840 transitions. [2021-08-06 18:38:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-08-06 18:38:12,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:12,555 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:12,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:12,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 18:38:12,756 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:12,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1550803387, now seen corresponding path program 12 times [2021-08-06 18:38:12,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:12,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158900792] [2021-08-06 18:38:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:12,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 583 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:38:12,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:12,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158900792] [2021-08-06 18:38:12,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158900792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:12,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185825893] [2021-08-06 18:38:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:38:12,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:12,934 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:12,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 18:38:15,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 18:38:15,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:38:15,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:16,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:16,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 583 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:38:16,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185825893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:16,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:16,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-06 18:38:16,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541152543] [2021-08-06 18:38:16,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:38:16,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:38:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:38:16,765 INFO L87 Difference]: Start difference. First operand 24717 states and 29840 transitions. Second operand has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:17,020 INFO L93 Difference]: Finished difference Result 32817 states and 38988 transitions. [2021-08-06 18:38:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:38:17,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-08-06 18:38:17,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:17,066 INFO L225 Difference]: With dead ends: 32817 [2021-08-06 18:38:17,066 INFO L226 Difference]: Without dead ends: 32817 [2021-08-06 18:38:17,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:38:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32817 states. [2021-08-06 18:38:17,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32817 to 26057. [2021-08-06 18:38:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26057 states, 26049 states have (on average 1.2084916887404507) internal successors, (31480), 26056 states have internal predecessors, (31480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26057 states to 26057 states and 31480 transitions. [2021-08-06 18:38:17,400 INFO L78 Accepts]: Start accepts. Automaton has 26057 states and 31480 transitions. Word has length 304 [2021-08-06 18:38:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:17,400 INFO L470 AbstractCegarLoop]: Abstraction has 26057 states and 31480 transitions. [2021-08-06 18:38:17,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand 26057 states and 31480 transitions. [2021-08-06 18:38:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-08-06 18:38:17,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:17,425 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:17,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:17,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 18:38:17,626 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:17,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:17,626 INFO L82 PathProgramCache]: Analyzing trace with hash -636287335, now seen corresponding path program 13 times [2021-08-06 18:38:17,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:17,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045322404] [2021-08-06 18:38:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:17,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 583 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:38:17,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:17,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045322404] [2021-08-06 18:38:17,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045322404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:17,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521190016] [2021-08-06 18:38:17,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:38:17,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:17,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:17,808 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:17,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 18:38:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:20,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:38:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:21,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:21,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 583 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:38:21,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521190016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:21,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:21,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-06 18:38:21,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674430839] [2021-08-06 18:38:21,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:38:21,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:21,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:38:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:38:21,669 INFO L87 Difference]: Start difference. First operand 26057 states and 31480 transitions. Second operand has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:21,933 INFO L93 Difference]: Finished difference Result 33637 states and 40124 transitions. [2021-08-06 18:38:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:38:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-08-06 18:38:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:21,977 INFO L225 Difference]: With dead ends: 33637 [2021-08-06 18:38:21,977 INFO L226 Difference]: Without dead ends: 33637 [2021-08-06 18:38:21,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:38:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33637 states. [2021-08-06 18:38:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33637 to 27997. [2021-08-06 18:38:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27997 states, 27989 states have (on average 1.2095466075958412) internal successors, (33854), 27996 states have internal predecessors, (33854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27997 states to 27997 states and 33854 transitions. [2021-08-06 18:38:22,423 INFO L78 Accepts]: Start accepts. Automaton has 27997 states and 33854 transitions. Word has length 304 [2021-08-06 18:38:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:22,424 INFO L470 AbstractCegarLoop]: Abstraction has 27997 states and 33854 transitions. [2021-08-06 18:38:22,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 27997 states and 33854 transitions. [2021-08-06 18:38:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-08-06 18:38:22,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:22,457 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:22,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:22,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:22,658 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:22,658 INFO L82 PathProgramCache]: Analyzing trace with hash -156514019, now seen corresponding path program 8 times [2021-08-06 18:38:22,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:22,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767639650] [2021-08-06 18:38:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:22,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:22,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:22,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767639650] [2021-08-06 18:38:22,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767639650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:22,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449587977] [2021-08-06 18:38:22,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:38:22,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:22,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:22,897 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:22,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 18:38:25,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:38:25,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:38:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:27,077 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:27,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:27,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449587977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:27,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:27,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-06 18:38:27,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032692437] [2021-08-06 18:38:27,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:38:27,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:27,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:38:27,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:38:27,105 INFO L87 Difference]: Start difference. First operand 27997 states and 33854 transitions. Second operand has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:27,486 INFO L93 Difference]: Finished difference Result 33711 states and 40405 transitions. [2021-08-06 18:38:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:38:27,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2021-08-06 18:38:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:27,530 INFO L225 Difference]: With dead ends: 33711 [2021-08-06 18:38:27,530 INFO L226 Difference]: Without dead ends: 33711 [2021-08-06 18:38:27,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:38:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33711 states. [2021-08-06 18:38:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33711 to 29947. [2021-08-06 18:38:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29947 states, 29939 states have (on average 1.2088580112896223) internal successors, (36192), 29946 states have internal predecessors, (36192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29947 states to 29947 states and 36192 transitions. [2021-08-06 18:38:27,881 INFO L78 Accepts]: Start accepts. Automaton has 29947 states and 36192 transitions. Word has length 334 [2021-08-06 18:38:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:27,882 INFO L470 AbstractCegarLoop]: Abstraction has 29947 states and 36192 transitions. [2021-08-06 18:38:27,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 29947 states and 36192 transitions. [2021-08-06 18:38:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-08-06 18:38:27,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:27,914 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:27,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:28,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:28,117 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2064518196, now seen corresponding path program 7 times [2021-08-06 18:38:28,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:28,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633370730] [2021-08-06 18:38:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:28,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 603 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:38:28,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:28,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633370730] [2021-08-06 18:38:28,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633370730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:28,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535752994] [2021-08-06 18:38:28,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:38:28,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:28,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:28,404 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:28,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 18:38:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:31,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:38:31,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:32,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:32,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:38:32,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535752994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:32,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:32,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-08-06 18:38:32,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224221099] [2021-08-06 18:38:32,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:38:32,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:32,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:38:32,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:38:32,646 INFO L87 Difference]: Start difference. First operand 29947 states and 36192 transitions. Second operand has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:32,916 INFO L93 Difference]: Finished difference Result 38098 states and 45222 transitions. [2021-08-06 18:38:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:38:32,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-08-06 18:38:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:32,965 INFO L225 Difference]: With dead ends: 38098 [2021-08-06 18:38:32,965 INFO L226 Difference]: Without dead ends: 38098 [2021-08-06 18:38:32,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:38:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38098 states. [2021-08-06 18:38:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38098 to 28007. [2021-08-06 18:38:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28007 states, 27999 states have (on average 1.2078288510303938) internal successors, (33818), 28006 states have internal predecessors, (33818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28007 states to 28007 states and 33818 transitions. [2021-08-06 18:38:33,337 INFO L78 Accepts]: Start accepts. Automaton has 28007 states and 33818 transitions. Word has length 338 [2021-08-06 18:38:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:33,337 INFO L470 AbstractCegarLoop]: Abstraction has 28007 states and 33818 transitions. [2021-08-06 18:38:33,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 28007 states and 33818 transitions. [2021-08-06 18:38:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-08-06 18:38:33,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:33,368 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:33,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:33,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:33,588 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:33,589 INFO L82 PathProgramCache]: Analyzing trace with hash 347535070, now seen corresponding path program 8 times [2021-08-06 18:38:33,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:33,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498691656] [2021-08-06 18:38:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:33,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 603 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:38:33,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:33,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498691656] [2021-08-06 18:38:33,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498691656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:33,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286651964] [2021-08-06 18:38:33,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:38:33,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:33,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:33,787 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:33,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 18:38:36,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:38:36,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:36,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:38:36,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:38,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:38,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:38:38,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286651964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:38,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:38,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-08-06 18:38:38,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522587227] [2021-08-06 18:38:38,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:38:38,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:38,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:38:38,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:38:38,311 INFO L87 Difference]: Start difference. First operand 28007 states and 33818 transitions. Second operand has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:38,593 INFO L93 Difference]: Finished difference Result 36863 states and 43914 transitions. [2021-08-06 18:38:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:38:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-08-06 18:38:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:38,641 INFO L225 Difference]: With dead ends: 36863 [2021-08-06 18:38:38,641 INFO L226 Difference]: Without dead ends: 36863 [2021-08-06 18:38:38,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:38:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36863 states. [2021-08-06 18:38:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36863 to 28007. [2021-08-06 18:38:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28007 states, 27999 states have (on average 1.2078288510303938) internal successors, (33818), 28006 states have internal predecessors, (33818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28007 states to 28007 states and 33818 transitions. [2021-08-06 18:38:39,023 INFO L78 Accepts]: Start accepts. Automaton has 28007 states and 33818 transitions. Word has length 338 [2021-08-06 18:38:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:39,024 INFO L470 AbstractCegarLoop]: Abstraction has 28007 states and 33818 transitions. [2021-08-06 18:38:39,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 28007 states and 33818 transitions. [2021-08-06 18:38:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-08-06 18:38:39,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:39,056 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:39,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:39,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:39,257 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:39,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:39,258 INFO L82 PathProgramCache]: Analyzing trace with hash -70257548, now seen corresponding path program 9 times [2021-08-06 18:38:39,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:39,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286932025] [2021-08-06 18:38:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:39,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 603 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:38:39,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:39,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286932025] [2021-08-06 18:38:39,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286932025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:39,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279739544] [2021-08-06 18:38:39,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:38:39,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:39,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:39,461 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:39,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 18:38:42,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 18:38:42,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:42,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:38:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:44,261 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:44,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:38:44,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279739544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:44,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:44,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-08-06 18:38:44,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445351609] [2021-08-06 18:38:44,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:38:44,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:38:44,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:38:44,289 INFO L87 Difference]: Start difference. First operand 28007 states and 33818 transitions. Second operand has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:44,573 INFO L93 Difference]: Finished difference Result 40566 states and 48448 transitions. [2021-08-06 18:38:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:38:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-08-06 18:38:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:44,631 INFO L225 Difference]: With dead ends: 40566 [2021-08-06 18:38:44,632 INFO L226 Difference]: Without dead ends: 40566 [2021-08-06 18:38:44,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:38:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40566 states. [2021-08-06 18:38:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40566 to 29947. [2021-08-06 18:38:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29947 states, 29939 states have (on average 1.2088580112896223) internal successors, (36192), 29946 states have internal predecessors, (36192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29947 states to 29947 states and 36192 transitions. [2021-08-06 18:38:45,050 INFO L78 Accepts]: Start accepts. Automaton has 29947 states and 36192 transitions. Word has length 338 [2021-08-06 18:38:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:45,051 INFO L470 AbstractCegarLoop]: Abstraction has 29947 states and 36192 transitions. [2021-08-06 18:38:45,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 29947 states and 36192 transitions. [2021-08-06 18:38:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-08-06 18:38:45,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:45,086 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:45,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:45,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-06 18:38:45,286 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:45,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1299029184, now seen corresponding path program 10 times [2021-08-06 18:38:45,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:45,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496032607] [2021-08-06 18:38:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:45,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:38:45,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:45,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496032607] [2021-08-06 18:38:45,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496032607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:45,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008830263] [2021-08-06 18:38:45,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:38:45,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:45,473 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:45,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 18:38:48,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:38:48,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:48,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:38:48,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:50,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:50,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:38:50,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008830263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:50,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:50,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-06 18:38:50,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440791513] [2021-08-06 18:38:50,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:38:50,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:50,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:38:50,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:38:50,360 INFO L87 Difference]: Start difference. First operand 29947 states and 36192 transitions. Second operand has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:50,613 INFO L93 Difference]: Finished difference Result 41186 states and 48963 transitions. [2021-08-06 18:38:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:38:50,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-08-06 18:38:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:50,668 INFO L225 Difference]: With dead ends: 41186 [2021-08-06 18:38:50,669 INFO L226 Difference]: Without dead ends: 41186 [2021-08-06 18:38:50,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-08-06 18:38:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41186 states. [2021-08-06 18:38:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41186 to 32147. [2021-08-06 18:38:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32147 states, 32139 states have (on average 1.210211892093718) internal successors, (38895), 32146 states have internal predecessors, (38895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32147 states to 32147 states and 38895 transitions. [2021-08-06 18:38:51,261 INFO L78 Accepts]: Start accepts. Automaton has 32147 states and 38895 transitions. Word has length 338 [2021-08-06 18:38:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:51,262 INFO L470 AbstractCegarLoop]: Abstraction has 32147 states and 38895 transitions. [2021-08-06 18:38:51,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 32147 states and 38895 transitions. [2021-08-06 18:38:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-08-06 18:38:51,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:51,297 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:51,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:51,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:51,498 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:51,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:51,498 INFO L82 PathProgramCache]: Analyzing trace with hash 881236566, now seen corresponding path program 11 times [2021-08-06 18:38:51,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:51,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623463727] [2021-08-06 18:38:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:51,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:38:51,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:51,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623463727] [2021-08-06 18:38:51,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623463727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:51,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115760219] [2021-08-06 18:38:51,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:38:51,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:51,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:51,685 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:51,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 18:38:55,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 18:38:55,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:38:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:56,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:56,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:38:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:38:56,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115760219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:56,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:56,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-06 18:38:56,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573865508] [2021-08-06 18:38:56,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:38:56,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:38:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:38:56,631 INFO L87 Difference]: Start difference. First operand 32147 states and 38895 transitions. Second operand has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:56,913 INFO L93 Difference]: Finished difference Result 49874 states and 59785 transitions. [2021-08-06 18:38:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:38:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-08-06 18:38:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:56,991 INFO L225 Difference]: With dead ends: 49874 [2021-08-06 18:38:56,991 INFO L226 Difference]: Without dead ends: 49874 [2021-08-06 18:38:56,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-08-06 18:38:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49874 states. [2021-08-06 18:38:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49874 to 34087. [2021-08-06 18:38:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34087 states, 34079 states have (on average 1.2109803691422871) internal successors, (41269), 34086 states have internal predecessors, (41269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34087 states to 34087 states and 41269 transitions. [2021-08-06 18:38:57,467 INFO L78 Accepts]: Start accepts. Automaton has 34087 states and 41269 transitions. Word has length 338 [2021-08-06 18:38:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:57,467 INFO L470 AbstractCegarLoop]: Abstraction has 34087 states and 41269 transitions. [2021-08-06 18:38:57,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.533333333333335) internal successors, (323), 15 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34087 states and 41269 transitions. [2021-08-06 18:38:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-08-06 18:38:57,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:57,511 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:57,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:57,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:57,711 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:38:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:57,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1994048163, now seen corresponding path program 14 times [2021-08-06 18:38:57,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:57,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526034581] [2021-08-06 18:38:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:57,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 832 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 18:38:57,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:57,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526034581] [2021-08-06 18:38:57,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526034581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:57,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350798340] [2021-08-06 18:38:57,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:38:57,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:57,942 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:57,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 18:39:01,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:39:01,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:39:01,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:02,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:02,985 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:03,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350798340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:03,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:03,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-08-06 18:39:03,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739980540] [2021-08-06 18:39:03,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:39:03,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:39:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:39:03,012 INFO L87 Difference]: Start difference. First operand 34087 states and 41269 transitions. Second operand has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:03,400 INFO L93 Difference]: Finished difference Result 39719 states and 47515 transitions. [2021-08-06 18:39:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:39:03,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-08-06 18:39:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:03,454 INFO L225 Difference]: With dead ends: 39719 [2021-08-06 18:39:03,454 INFO L226 Difference]: Without dead ends: 39719 [2021-08-06 18:39:03,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:39:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39719 states. [2021-08-06 18:39:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39719 to 34687. [2021-08-06 18:39:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34687 states, 34679 states have (on average 1.21119409440872) internal successors, (42003), 34686 states have internal predecessors, (42003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34687 states to 34687 states and 42003 transitions. [2021-08-06 18:39:03,880 INFO L78 Accepts]: Start accepts. Automaton has 34687 states and 42003 transitions. Word has length 339 [2021-08-06 18:39:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:03,881 INFO L470 AbstractCegarLoop]: Abstraction has 34687 states and 42003 transitions. [2021-08-06 18:39:03,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 34687 states and 42003 transitions. [2021-08-06 18:39:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-08-06 18:39:03,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:03,920 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:03,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 18:39:04,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 18:39:04,121 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:39:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1425594625, now seen corresponding path program 15 times [2021-08-06 18:39:04,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:04,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512121728] [2021-08-06 18:39:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:04,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:04,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:04,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512121728] [2021-08-06 18:39:04,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512121728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:04,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29489687] [2021-08-06 18:39:04,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:39:04,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:04,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:04,320 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:04,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 18:39:07,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 18:39:07,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:39:07,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:09,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:09,581 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:09,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29489687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:09,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:09,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-06 18:39:09,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342955996] [2021-08-06 18:39:09,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:39:09,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:09,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:39:09,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:39:09,609 INFO L87 Difference]: Start difference. First operand 34687 states and 42003 transitions. Second operand has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:09,924 INFO L93 Difference]: Finished difference Result 41995 states and 49983 transitions. [2021-08-06 18:39:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:39:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-08-06 18:39:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:09,980 INFO L225 Difference]: With dead ends: 41995 [2021-08-06 18:39:09,980 INFO L226 Difference]: Without dead ends: 41995 [2021-08-06 18:39:09,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:39:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41995 states. [2021-08-06 18:39:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41995 to 34087. [2021-08-06 18:39:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34087 states, 34079 states have (on average 1.2109803691422871) internal successors, (41269), 34086 states have internal predecessors, (41269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34087 states to 34087 states and 41269 transitions. [2021-08-06 18:39:10,408 INFO L78 Accepts]: Start accepts. Automaton has 34087 states and 41269 transitions. Word has length 339 [2021-08-06 18:39:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:10,409 INFO L470 AbstractCegarLoop]: Abstraction has 34087 states and 41269 transitions. [2021-08-06 18:39:10,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 34087 states and 41269 transitions. [2021-08-06 18:39:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-08-06 18:39:10,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:10,445 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:10,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:10,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 18:39:10,646 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:39:10,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:10,646 INFO L82 PathProgramCache]: Analyzing trace with hash -345663645, now seen corresponding path program 16 times [2021-08-06 18:39:10,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:10,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441405234] [2021-08-06 18:39:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:10,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:10,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:10,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441405234] [2021-08-06 18:39:10,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441405234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:10,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531450281] [2021-08-06 18:39:10,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:39:10,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:10,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:10,853 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:10,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 18:39:14,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:39:14,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:39:14,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:16,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:16,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:16,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531450281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:16,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:16,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-06 18:39:16,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733451970] [2021-08-06 18:39:16,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:39:16,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:39:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:39:16,178 INFO L87 Difference]: Start difference. First operand 34087 states and 41269 transitions. Second operand has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:16,492 INFO L93 Difference]: Finished difference Result 43575 states and 52045 transitions. [2021-08-06 18:39:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:39:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-08-06 18:39:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:16,549 INFO L225 Difference]: With dead ends: 43575 [2021-08-06 18:39:16,549 INFO L226 Difference]: Without dead ends: 43575 [2021-08-06 18:39:16,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 18:39:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43575 states. [2021-08-06 18:39:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43575 to 36027. [2021-08-06 18:39:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36027 states, 36019 states have (on average 1.2116660651322912) internal successors, (43643), 36026 states have internal predecessors, (43643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36027 states to 36027 states and 43643 transitions. [2021-08-06 18:39:17,031 INFO L78 Accepts]: Start accepts. Automaton has 36027 states and 43643 transitions. Word has length 339 [2021-08-06 18:39:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:17,031 INFO L470 AbstractCegarLoop]: Abstraction has 36027 states and 43643 transitions. [2021-08-06 18:39:17,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 36027 states and 43643 transitions. [2021-08-06 18:39:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-08-06 18:39:17,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:17,073 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:17,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 18:39:17,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 18:39:17,273 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:39:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1762212929, now seen corresponding path program 17 times [2021-08-06 18:39:17,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:17,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829366005] [2021-08-06 18:39:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:17,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:17,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:17,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829366005] [2021-08-06 18:39:17,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829366005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:17,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532705787] [2021-08-06 18:39:17,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:39:17,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:17,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:17,493 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:17,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 18:39:21,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 18:39:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:39:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:22,877 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:22,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:22,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532705787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:22,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:22,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-06 18:39:22,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127755430] [2021-08-06 18:39:22,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:39:22,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:22,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:39:22,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:39:22,909 INFO L87 Difference]: Start difference. First operand 36027 states and 43643 transitions. Second operand has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:23,243 INFO L93 Difference]: Finished difference Result 45283 states and 54021 transitions. [2021-08-06 18:39:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:39:23,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-08-06 18:39:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:23,302 INFO L225 Difference]: With dead ends: 45283 [2021-08-06 18:39:23,303 INFO L226 Difference]: Without dead ends: 45283 [2021-08-06 18:39:23,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:39:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45283 states. [2021-08-06 18:39:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45283 to 37967. [2021-08-06 18:39:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37967 states, 37959 states have (on average 1.2122816723306726) internal successors, (46017), 37966 states have internal predecessors, (46017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37967 states to 37967 states and 46017 transitions. [2021-08-06 18:39:23,763 INFO L78 Accepts]: Start accepts. Automaton has 37967 states and 46017 transitions. Word has length 339 [2021-08-06 18:39:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:23,763 INFO L470 AbstractCegarLoop]: Abstraction has 37967 states and 46017 transitions. [2021-08-06 18:39:23,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 37967 states and 46017 transitions. [2021-08-06 18:39:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-08-06 18:39:23,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:23,806 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:23,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:24,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 18:39:24,007 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:39:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:24,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1617230883, now seen corresponding path program 18 times [2021-08-06 18:39:24,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:24,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883013872] [2021-08-06 18:39:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:24,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:24,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:24,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883013872] [2021-08-06 18:39:24,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883013872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:24,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817039236] [2021-08-06 18:39:24,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:39:24,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:24,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:24,224 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:24,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 18:39:28,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 18:39:28,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:28,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:39:28,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:29,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:29,921 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:29,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817039236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:29,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:29,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-06 18:39:29,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577923046] [2021-08-06 18:39:29,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:39:29,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:29,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:39:29,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:39:29,949 INFO L87 Difference]: Start difference. First operand 37967 states and 46017 transitions. Second operand has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:30,295 INFO L93 Difference]: Finished difference Result 48098 states and 57325 transitions. [2021-08-06 18:39:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:39:30,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-08-06 18:39:30,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:30,355 INFO L225 Difference]: With dead ends: 48098 [2021-08-06 18:39:30,355 INFO L226 Difference]: Without dead ends: 48098 [2021-08-06 18:39:30,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=310, Invalid=880, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 18:39:30,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48098 states. [2021-08-06 18:39:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48098 to 39307. [2021-08-06 18:39:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39307 states, 39299 states have (on average 1.212677167357948) internal successors, (47657), 39306 states have internal predecessors, (47657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39307 states to 39307 states and 47657 transitions. [2021-08-06 18:39:30,857 INFO L78 Accepts]: Start accepts. Automaton has 39307 states and 47657 transitions. Word has length 339 [2021-08-06 18:39:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:30,857 INFO L470 AbstractCegarLoop]: Abstraction has 39307 states and 47657 transitions. [2021-08-06 18:39:30,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 39307 states and 47657 transitions. [2021-08-06 18:39:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-08-06 18:39:30,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:30,901 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:30,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:31,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:31,101 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:39:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash -986771583, now seen corresponding path program 19 times [2021-08-06 18:39:31,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:31,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112831157] [2021-08-06 18:39:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:31,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:31,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:31,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112831157] [2021-08-06 18:39:31,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112831157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:31,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912964692] [2021-08-06 18:39:31,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:39:31,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:31,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:31,299 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:31,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 18:39:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:35,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 18:39:35,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:36,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:36,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:39:36,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912964692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:36,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:36,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-06 18:39:36,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354704779] [2021-08-06 18:39:36,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:39:36,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:39:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:39:36,930 INFO L87 Difference]: Start difference. First operand 39307 states and 47657 transitions. Second operand has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:37,278 INFO L93 Difference]: Finished difference Result 49038 states and 58747 transitions. [2021-08-06 18:39:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:39:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-08-06 18:39:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:37,343 INFO L225 Difference]: With dead ends: 49038 [2021-08-06 18:39:37,344 INFO L226 Difference]: Without dead ends: 49038 [2021-08-06 18:39:37,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=319, Invalid=941, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 18:39:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49038 states. [2021-08-06 18:39:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49038 to 38707. [2021-08-06 18:39:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38707 states, 38699 states have (on average 1.2125119512132096) internal successors, (46923), 38706 states have internal predecessors, (46923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38707 states to 38707 states and 46923 transitions. [2021-08-06 18:39:37,881 INFO L78 Accepts]: Start accepts. Automaton has 38707 states and 46923 transitions. Word has length 339 [2021-08-06 18:39:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:37,882 INFO L470 AbstractCegarLoop]: Abstraction has 38707 states and 46923 transitions. [2021-08-06 18:39:37,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.944444444444443) internal successors, (359), 18 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 38707 states and 46923 transitions. [2021-08-06 18:39:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-08-06 18:39:37,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:37,925 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:37,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:38,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 18:39:38,125 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:39:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:38,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1591826849, now seen corresponding path program 9 times [2021-08-06 18:39:38,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:38,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829072108] [2021-08-06 18:39:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:38,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:38,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:38,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829072108] [2021-08-06 18:39:38,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829072108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:38,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523009622] [2021-08-06 18:39:38,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:39:38,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:38,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:38,421 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:38,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 18:39:42,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 18:39:42,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:42,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:39:42,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:44,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:44,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:44,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523009622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:44,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:44,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-06 18:39:44,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350568885] [2021-08-06 18:39:44,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:39:44,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:44,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:39:44,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:39:44,718 INFO L87 Difference]: Start difference. First operand 38707 states and 46923 transitions. Second operand has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:45,174 INFO L93 Difference]: Finished difference Result 44801 states and 53870 transitions. [2021-08-06 18:39:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:39:45,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 369 [2021-08-06 18:39:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:45,235 INFO L225 Difference]: With dead ends: 44801 [2021-08-06 18:39:45,235 INFO L226 Difference]: Without dead ends: 44801 [2021-08-06 18:39:45,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 348.5ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 18:39:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44801 states. [2021-08-06 18:39:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44801 to 40657. [2021-08-06 18:39:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40657 states, 40649 states have (on average 1.2118625304435533) internal successors, (49261), 40656 states have internal predecessors, (49261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40657 states to 40657 states and 49261 transitions. [2021-08-06 18:39:45,730 INFO L78 Accepts]: Start accepts. Automaton has 40657 states and 49261 transitions. Word has length 369 [2021-08-06 18:39:45,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:45,730 INFO L470 AbstractCegarLoop]: Abstraction has 40657 states and 49261 transitions. [2021-08-06 18:39:45,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 40657 states and 49261 transitions. [2021-08-06 18:39:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-08-06 18:39:45,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:45,775 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:45,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:45,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 18:39:45,976 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:39:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1217567089, now seen corresponding path program 12 times [2021-08-06 18:39:45,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:45,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405381671] [2021-08-06 18:39:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:45,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 18 proven. 633 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-06 18:39:46,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:46,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405381671] [2021-08-06 18:39:46,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405381671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:46,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228167400] [2021-08-06 18:39:46,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:39:46,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:46,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:46,150 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:46,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 18:39:50,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 18:39:50,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:50,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:39:50,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:52,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:52,266 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 18 proven. 609 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-06 18:39:52,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228167400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:52,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:52,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-08-06 18:39:52,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103008084] [2021-08-06 18:39:52,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:39:52,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:39:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:39:52,294 INFO L87 Difference]: Start difference. First operand 40657 states and 49261 transitions. Second operand has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:52,641 INFO L93 Difference]: Finished difference Result 68009 states and 81210 transitions. [2021-08-06 18:39:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:39:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 372 [2021-08-06 18:39:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:52,739 INFO L225 Difference]: With dead ends: 68009 [2021-08-06 18:39:52,739 INFO L226 Difference]: Without dead ends: 68009 [2021-08-06 18:39:52,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:39:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68009 states. [2021-08-06 18:39:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68009 to 46857. [2021-08-06 18:39:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46857 states, 46849 states have (on average 1.2138786313475207) internal successors, (56869), 46856 states have internal predecessors, (56869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46857 states to 46857 states and 56869 transitions. [2021-08-06 18:39:53,419 INFO L78 Accepts]: Start accepts. Automaton has 46857 states and 56869 transitions. Word has length 372 [2021-08-06 18:39:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:53,419 INFO L470 AbstractCegarLoop]: Abstraction has 46857 states and 56869 transitions. [2021-08-06 18:39:53,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 46857 states and 56869 transitions. [2021-08-06 18:39:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-08-06 18:39:53,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:53,471 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:53,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:53,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-06 18:39:53,672 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:39:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash 787190760, now seen corresponding path program 13 times [2021-08-06 18:39:53,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:53,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676776615] [2021-08-06 18:39:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:53,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 828 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:39:53,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:53,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676776615] [2021-08-06 18:39:53,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676776615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:53,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793745018] [2021-08-06 18:39:53,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:39:53,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:53,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:53,891 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:53,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 18:39:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:58,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:39:58,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:00,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:00,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:00,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793745018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:00,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:00,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-08-06 18:40:00,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624875405] [2021-08-06 18:40:00,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:40:00,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:40:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:40:00,310 INFO L87 Difference]: Start difference. First operand 46857 states and 56869 transitions. Second operand has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:00,702 INFO L93 Difference]: Finished difference Result 56976 states and 68049 transitions. [2021-08-06 18:40:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:40:00,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-08-06 18:40:00,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:00,786 INFO L225 Difference]: With dead ends: 56976 [2021-08-06 18:40:00,786 INFO L226 Difference]: Without dead ends: 56976 [2021-08-06 18:40:00,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 18:40:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56976 states. [2021-08-06 18:40:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56976 to 44917. [2021-08-06 18:40:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44917 states, 44909 states have (on average 1.2134538733884077) internal successors, (54495), 44916 states have internal predecessors, (54495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44917 states to 44917 states and 54495 transitions. [2021-08-06 18:40:01,401 INFO L78 Accepts]: Start accepts. Automaton has 44917 states and 54495 transitions. Word has length 373 [2021-08-06 18:40:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:01,401 INFO L470 AbstractCegarLoop]: Abstraction has 44917 states and 54495 transitions. [2021-08-06 18:40:01,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 44917 states and 54495 transitions. [2021-08-06 18:40:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-08-06 18:40:01,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:01,450 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:01,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:01,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:01,651 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:40:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:01,652 INFO L82 PathProgramCache]: Analyzing trace with hash -272246530, now seen corresponding path program 14 times [2021-08-06 18:40:01,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:01,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804706649] [2021-08-06 18:40:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:01,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 828 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:40:01,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:01,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804706649] [2021-08-06 18:40:01,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804706649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:01,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765434427] [2021-08-06 18:40:01,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:40:01,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:01,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:01,868 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:01,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 18:40:06,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:40:06,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:06,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:40:06,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:08,328 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:08,329 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:08,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765434427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:08,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:08,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-08-06 18:40:08,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461705215] [2021-08-06 18:40:08,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:40:08,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:08,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:40:08,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:40:08,356 INFO L87 Difference]: Start difference. First operand 44917 states and 54495 transitions. Second operand has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:08,721 INFO L93 Difference]: Finished difference Result 63752 states and 76281 transitions. [2021-08-06 18:40:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:40:08,721 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-08-06 18:40:08,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:08,815 INFO L225 Difference]: With dead ends: 63752 [2021-08-06 18:40:08,815 INFO L226 Difference]: Without dead ends: 63752 [2021-08-06 18:40:08,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 18:40:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63752 states. [2021-08-06 18:40:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63752 to 46257. [2021-08-06 18:40:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46257 states, 46249 states have (on average 1.213755973102121) internal successors, (56135), 46256 states have internal predecessors, (56135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46257 states to 46257 states and 56135 transitions. [2021-08-06 18:40:09,517 INFO L78 Accepts]: Start accepts. Automaton has 46257 states and 56135 transitions. Word has length 373 [2021-08-06 18:40:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:09,517 INFO L470 AbstractCegarLoop]: Abstraction has 46257 states and 56135 transitions. [2021-08-06 18:40:09,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 46257 states and 56135 transitions. [2021-08-06 18:40:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-08-06 18:40:09,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:09,569 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:09,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:09,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:09,778 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:40:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:09,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1989229656, now seen corresponding path program 15 times [2021-08-06 18:40:09,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:09,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363439292] [2021-08-06 18:40:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:09,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 828 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:40:10,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:10,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363439292] [2021-08-06 18:40:10,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363439292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:10,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636810299] [2021-08-06 18:40:10,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:40:10,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:10,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:10,289 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:10,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 18:40:15,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 18:40:15,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:15,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:40:15,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:16,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:16,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:17,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636810299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:17,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:17,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-08-06 18:40:17,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332876812] [2021-08-06 18:40:17,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:40:17,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:17,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:40:17,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:40:17,022 INFO L87 Difference]: Start difference. First operand 46257 states and 56135 transitions. Second operand has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:17,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:17,418 INFO L93 Difference]: Finished difference Result 62517 states and 74967 transitions. [2021-08-06 18:40:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:40:17,419 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-08-06 18:40:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:17,509 INFO L225 Difference]: With dead ends: 62517 [2021-08-06 18:40:17,509 INFO L226 Difference]: Without dead ends: 62517 [2021-08-06 18:40:17,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:40:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62517 states. [2021-08-06 18:40:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62517 to 48197. [2021-08-06 18:40:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48197 states, 48189 states have (on average 1.2141567577662953) internal successors, (58509), 48196 states have internal predecessors, (58509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48197 states to 48197 states and 58509 transitions. [2021-08-06 18:40:18,365 INFO L78 Accepts]: Start accepts. Automaton has 48197 states and 58509 transitions. Word has length 373 [2021-08-06 18:40:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:18,366 INFO L470 AbstractCegarLoop]: Abstraction has 48197 states and 58509 transitions. [2021-08-06 18:40:18,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 48197 states and 58509 transitions. [2021-08-06 18:40:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-08-06 18:40:18,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:18,424 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:18,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:18,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 18:40:18,626 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:40:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1887945022, now seen corresponding path program 16 times [2021-08-06 18:40:18,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:18,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551708851] [2021-08-06 18:40:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:18,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 828 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:40:18,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:18,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551708851] [2021-08-06 18:40:18,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551708851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:18,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927425336] [2021-08-06 18:40:18,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:40:18,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:18,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:18,982 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:18,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 18:40:23,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:40:23,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:23,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:40:23,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:25,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:25,588 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:25,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927425336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:25,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:25,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-08-06 18:40:25,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995510391] [2021-08-06 18:40:25,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:40:25,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:40:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:40:25,615 INFO L87 Difference]: Start difference. First operand 48197 states and 58509 transitions. Second operand has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:26,078 INFO L93 Difference]: Finished difference Result 63440 states and 76297 transitions. [2021-08-06 18:40:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:40:26,079 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-08-06 18:40:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:26,180 INFO L225 Difference]: With dead ends: 63440 [2021-08-06 18:40:26,180 INFO L226 Difference]: Without dead ends: 63440 [2021-08-06 18:40:26,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 18:40:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63440 states. [2021-08-06 18:40:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63440 to 48797. [2021-08-06 18:40:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48797 states, 48789 states have (on average 1.2142696099530632) internal successors, (59243), 48796 states have internal predecessors, (59243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48797 states to 48797 states and 59243 transitions. [2021-08-06 18:40:26,952 INFO L78 Accepts]: Start accepts. Automaton has 48797 states and 59243 transitions. Word has length 373 [2021-08-06 18:40:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:26,953 INFO L470 AbstractCegarLoop]: Abstraction has 48797 states and 59243 transitions. [2021-08-06 18:40:26,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 48797 states and 59243 transitions. [2021-08-06 18:40:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-08-06 18:40:27,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:27,006 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:27,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:27,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 18:40:27,206 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:40:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash 712300508, now seen corresponding path program 17 times [2021-08-06 18:40:27,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:27,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962633942] [2021-08-06 18:40:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:27,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:27,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:27,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962633942] [2021-08-06 18:40:27,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962633942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:27,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681855388] [2021-08-06 18:40:27,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:40:27,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:27,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:27,392 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:27,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 18:40:32,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 18:40:32,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:40:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:34,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:34,548 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:34,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681855388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:34,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:34,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-06 18:40:34,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165656941] [2021-08-06 18:40:34,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:40:34,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:34,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:40:34,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:40:34,575 INFO L87 Difference]: Start difference. First operand 48797 states and 59243 transitions. Second operand has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:34,906 INFO L93 Difference]: Finished difference Result 62096 states and 74256 transitions. [2021-08-06 18:40:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:40:34,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-08-06 18:40:34,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:35,002 INFO L225 Difference]: With dead ends: 62096 [2021-08-06 18:40:35,002 INFO L226 Difference]: Without dead ends: 62096 [2021-08-06 18:40:35,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:40:35,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62096 states. [2021-08-06 18:40:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62096 to 47117. [2021-08-06 18:40:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47117 states, 47109 states have (on average 1.2141628988091449) internal successors, (57198), 47116 states have internal predecessors, (57198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47117 states to 47117 states and 57198 transitions. [2021-08-06 18:40:35,719 INFO L78 Accepts]: Start accepts. Automaton has 47117 states and 57198 transitions. Word has length 373 [2021-08-06 18:40:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:35,719 INFO L470 AbstractCegarLoop]: Abstraction has 47117 states and 57198 transitions. [2021-08-06 18:40:35,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 47117 states and 57198 transitions. [2021-08-06 18:40:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-08-06 18:40:35,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:35,771 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:35,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 18:40:35,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 18:40:35,972 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:40:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1004682618, now seen corresponding path program 18 times [2021-08-06 18:40:35,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:35,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13118271] [2021-08-06 18:40:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:35,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:36,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:36,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13118271] [2021-08-06 18:40:36,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13118271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:36,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750093919] [2021-08-06 18:40:36,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:40:36,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:36,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:36,189 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:36,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 18:40:41,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 18:40:41,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:41,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:40:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:43,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:43,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750093919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:43,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:43,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-06 18:40:43,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908499285] [2021-08-06 18:40:43,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:40:43,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:43,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:40:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:40:43,509 INFO L87 Difference]: Start difference. First operand 47117 states and 57198 transitions. Second operand has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:43,872 INFO L93 Difference]: Finished difference Result 75244 states and 90320 transitions. [2021-08-06 18:40:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:40:43,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-08-06 18:40:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:43,981 INFO L225 Difference]: With dead ends: 75244 [2021-08-06 18:40:43,982 INFO L226 Difference]: Without dead ends: 75244 [2021-08-06 18:40:43,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:40:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75244 states. [2021-08-06 18:40:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75244 to 50997. [2021-08-06 18:40:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50997 states, 50989 states have (on average 1.2148894859675616) internal successors, (61946), 50996 states have internal predecessors, (61946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50997 states to 50997 states and 61946 transitions. [2021-08-06 18:40:44,729 INFO L78 Accepts]: Start accepts. Automaton has 50997 states and 61946 transitions. Word has length 373 [2021-08-06 18:40:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:44,729 INFO L470 AbstractCegarLoop]: Abstraction has 50997 states and 61946 transitions. [2021-08-06 18:40:44,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:44,729 INFO L276 IsEmpty]: Start isEmpty. Operand 50997 states and 61946 transitions. [2021-08-06 18:40:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-08-06 18:40:45,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:45,070 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:45,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:45,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:45,283 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:40:45,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1422475236, now seen corresponding path program 19 times [2021-08-06 18:40:45,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:45,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378508262] [2021-08-06 18:40:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:45,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:45,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:45,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378508262] [2021-08-06 18:40:45,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378508262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:45,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221410173] [2021-08-06 18:40:45,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:40:45,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:45,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:45,705 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:45,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 18:40:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:50,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:40:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:52,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:52,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:40:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:52,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221410173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:52,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:52,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-06 18:40:52,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524061720] [2021-08-06 18:40:52,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:40:52,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:40:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:40:52,663 INFO L87 Difference]: Start difference. First operand 50997 states and 61946 transitions. Second operand has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:53,040 INFO L93 Difference]: Finished difference Result 72704 states and 87524 transitions. [2021-08-06 18:40:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:40:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-08-06 18:40:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:53,149 INFO L225 Difference]: With dead ends: 72704 [2021-08-06 18:40:53,150 INFO L226 Difference]: Without dead ends: 72704 [2021-08-06 18:40:53,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:40:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72704 states. [2021-08-06 18:40:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72704 to 50397. [2021-08-06 18:40:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50397 states, 50389 states have (on average 1.2147889420309987) internal successors, (61212), 50396 states have internal predecessors, (61212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50397 states to 50397 states and 61212 transitions. [2021-08-06 18:40:54,112 INFO L78 Accepts]: Start accepts. Automaton has 50397 states and 61212 transitions. Word has length 373 [2021-08-06 18:40:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:54,112 INFO L470 AbstractCegarLoop]: Abstraction has 50397 states and 61212 transitions. [2021-08-06 18:40:54,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 50397 states and 61212 transitions. [2021-08-06 18:40:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-08-06 18:40:54,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:54,164 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:54,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:54,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:54,365 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:40:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash -53188504, now seen corresponding path program 20 times [2021-08-06 18:40:54,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:54,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742237924] [2021-08-06 18:40:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:54,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:40:54,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:54,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742237924] [2021-08-06 18:40:54,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742237924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:54,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377910698] [2021-08-06 18:40:54,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:40:54,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:54,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:54,775 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:54,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 18:41:00,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:41:00,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:41:00,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:01,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:01,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:41:01,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377910698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:01,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:01,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-06 18:41:01,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794718672] [2021-08-06 18:41:01,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:41:01,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:01,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:41:01,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:41:01,810 INFO L87 Difference]: Start difference. First operand 50397 states and 61212 transitions. Second operand has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:02,168 INFO L93 Difference]: Finished difference Result 64780 states and 77575 transitions. [2021-08-06 18:41:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:41:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-08-06 18:41:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:02,259 INFO L225 Difference]: With dead ends: 64780 [2021-08-06 18:41:02,259 INFO L226 Difference]: Without dead ends: 64780 [2021-08-06 18:41:02,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:41:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64780 states. [2021-08-06 18:41:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64780 to 52597. [2021-08-06 18:41:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52597 states, 52589 states have (on average 1.2153682329004165) internal successors, (63915), 52596 states have internal predecessors, (63915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52597 states to 52597 states and 63915 transitions. [2021-08-06 18:41:02,928 INFO L78 Accepts]: Start accepts. Automaton has 52597 states and 63915 transitions. Word has length 373 [2021-08-06 18:41:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:02,928 INFO L470 AbstractCegarLoop]: Abstraction has 52597 states and 63915 transitions. [2021-08-06 18:41:02,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 52597 states and 63915 transitions. [2021-08-06 18:41:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-08-06 18:41:02,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:02,994 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:41:03,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:03,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:03,195 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:41:03,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:03,195 INFO L82 PathProgramCache]: Analyzing trace with hash -470981122, now seen corresponding path program 21 times [2021-08-06 18:41:03,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:03,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722006562] [2021-08-06 18:41:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:03,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:41:03,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:03,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722006562] [2021-08-06 18:41:03,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722006562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:03,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440566191] [2021-08-06 18:41:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:41:03,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:03,707 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:03,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 18:41:09,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 18:41:09,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:09,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:41:09,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:11,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:11,153 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 804 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:41:11,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440566191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:11,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:11,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-06 18:41:11,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610124470] [2021-08-06 18:41:11,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:41:11,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:41:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:41:11,179 INFO L87 Difference]: Start difference. First operand 52597 states and 63915 transitions. Second operand has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:11,574 INFO L93 Difference]: Finished difference Result 87079 states and 105033 transitions. [2021-08-06 18:41:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:41:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-08-06 18:41:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:11,702 INFO L225 Difference]: With dead ends: 87079 [2021-08-06 18:41:11,702 INFO L226 Difference]: Without dead ends: 87079 [2021-08-06 18:41:11,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:41:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87079 states. [2021-08-06 18:41:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87079 to 54537. [2021-08-06 18:41:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54537 states, 54529 states have (on average 1.2156650589594529) internal successors, (66289), 54536 states have internal predecessors, (66289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54537 states to 54537 states and 66289 transitions. [2021-08-06 18:41:12,747 INFO L78 Accepts]: Start accepts. Automaton has 54537 states and 66289 transitions. Word has length 373 [2021-08-06 18:41:12,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:12,748 INFO L470 AbstractCegarLoop]: Abstraction has 54537 states and 66289 transitions. [2021-08-06 18:41:12,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.058823529411764) internal successors, (358), 17 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54537 states and 66289 transitions. [2021-08-06 18:41:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-08-06 18:41:12,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:12,815 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:41:12,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:13,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 18:41:13,016 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:41:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:13,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1726181607, now seen corresponding path program 20 times [2021-08-06 18:41:13,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:13,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319539568] [2021-08-06 18:41:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:13,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1092 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 18:41:13,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:13,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319539568] [2021-08-06 18:41:13,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319539568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:13,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649249629] [2021-08-06 18:41:13,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:41:13,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:13,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:13,519 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:13,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 18:41:19,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:41:19,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:41:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:20,794 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:20,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:41:20,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649249629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:20,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:20,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-08-06 18:41:20,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062994833] [2021-08-06 18:41:20,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:41:20,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:20,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:41:20,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:41:20,821 INFO L87 Difference]: Start difference. First operand 54537 states and 66289 transitions. Second operand has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:21,261 INFO L93 Difference]: Finished difference Result 61529 states and 74061 transitions. [2021-08-06 18:41:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:41:21,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-08-06 18:41:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:21,421 INFO L225 Difference]: With dead ends: 61529 [2021-08-06 18:41:21,421 INFO L226 Difference]: Without dead ends: 61529 [2021-08-06 18:41:21,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 18:41:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61529 states. [2021-08-06 18:41:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61529 to 55737. [2021-08-06 18:41:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55737 states, 55729 states have (on average 1.2158301781837104) internal successors, (67757), 55736 states have internal predecessors, (67757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55737 states to 55737 states and 67757 transitions. [2021-08-06 18:41:22,068 INFO L78 Accepts]: Start accepts. Automaton has 55737 states and 67757 transitions. Word has length 374 [2021-08-06 18:41:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:22,069 INFO L470 AbstractCegarLoop]: Abstraction has 55737 states and 67757 transitions. [2021-08-06 18:41:22,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 55737 states and 67757 transitions. [2021-08-06 18:41:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-08-06 18:41:22,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:22,143 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:41:22,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:22,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-06 18:41:22,343 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:41:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:22,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1269994501, now seen corresponding path program 21 times [2021-08-06 18:41:22,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:22,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369990484] [2021-08-06 18:41:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:22,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:41:22,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:22,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369990484] [2021-08-06 18:41:22,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369990484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:22,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159861127] [2021-08-06 18:41:22,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:41:22,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:22,887 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:22,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 18:41:29,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 18:41:29,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:29,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:41:29,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:30,798 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:30,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:41:30,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159861127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:30,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:30,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-08-06 18:41:30,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865852159] [2021-08-06 18:41:30,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:41:30,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:41:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:41:30,825 INFO L87 Difference]: Start difference. First operand 55737 states and 67757 transitions. Second operand has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:31,320 INFO L93 Difference]: Finished difference Result 64785 states and 77659 transitions. [2021-08-06 18:41:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:41:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-08-06 18:41:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:31,414 INFO L225 Difference]: With dead ends: 64785 [2021-08-06 18:41:31,415 INFO L226 Difference]: Without dead ends: 64785 [2021-08-06 18:41:31,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 18:41:31,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64785 states. [2021-08-06 18:41:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64785 to 55137. [2021-08-06 18:41:32,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55137 states, 55129 states have (on average 1.2157485171144045) internal successors, (67023), 55136 states have internal predecessors, (67023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55137 states to 55137 states and 67023 transitions. [2021-08-06 18:41:32,089 INFO L78 Accepts]: Start accepts. Automaton has 55137 states and 67023 transitions. Word has length 374 [2021-08-06 18:41:32,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:32,089 INFO L470 AbstractCegarLoop]: Abstraction has 55137 states and 67023 transitions. [2021-08-06 18:41:32,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:32,090 INFO L276 IsEmpty]: Start isEmpty. Operand 55137 states and 67023 transitions. [2021-08-06 18:41:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-08-06 18:41:32,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:32,426 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:41:32,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:32,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:32,626 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:41:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1838448039, now seen corresponding path program 22 times [2021-08-06 18:41:32,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:32,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034717269] [2021-08-06 18:41:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:32,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:41:32,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:32,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034717269] [2021-08-06 18:41:32,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034717269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:32,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282466380] [2021-08-06 18:41:32,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:41:32,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:32,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:32,863 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:32,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 18:41:39,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:41:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:39,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:41:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:40,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:40,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:41:40,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282466380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:40,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:40,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-08-06 18:41:40,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154619930] [2021-08-06 18:41:40,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:41:40,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:41:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:41:40,951 INFO L87 Difference]: Start difference. First operand 55137 states and 67023 transitions. Second operand has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:41,392 INFO L93 Difference]: Finished difference Result 67285 states and 80839 transitions. [2021-08-06 18:41:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:41:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-08-06 18:41:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:41,492 INFO L225 Difference]: With dead ends: 67285 [2021-08-06 18:41:41,492 INFO L226 Difference]: Without dead ends: 67285 [2021-08-06 18:41:41,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:41:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67285 states. [2021-08-06 18:41:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67285 to 56477. [2021-08-06 18:41:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56477 states, 56469 states have (on average 1.2159414900210734) internal successors, (68663), 56476 states have internal predecessors, (68663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56477 states to 56477 states and 68663 transitions. [2021-08-06 18:41:42,277 INFO L78 Accepts]: Start accepts. Automaton has 56477 states and 68663 transitions. Word has length 374 [2021-08-06 18:41:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:42,277 INFO L470 AbstractCegarLoop]: Abstraction has 56477 states and 68663 transitions. [2021-08-06 18:41:42,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 56477 states and 68663 transitions. [2021-08-06 18:41:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-08-06 18:41:42,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:42,348 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:41:42,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 18:41:42,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 18:41:42,553 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:41:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash 685260987, now seen corresponding path program 23 times [2021-08-06 18:41:42,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:42,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657652677] [2021-08-06 18:41:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:42,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:41:43,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:43,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657652677] [2021-08-06 18:41:43,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657652677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:43,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280699678] [2021-08-06 18:41:43,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:41:43,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:43,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:43,070 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:43,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 18:41:49,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 18:41:49,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:49,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:41:49,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:51,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:51,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:41:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:41:51,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280699678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:51,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:51,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-08-06 18:41:51,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198969738] [2021-08-06 18:41:51,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:41:51,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:51,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:41:51,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:41:51,091 INFO L87 Difference]: Start difference. First operand 56477 states and 68663 transitions. Second operand has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:51,549 INFO L93 Difference]: Finished difference Result 70133 states and 84137 transitions. [2021-08-06 18:41:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:41:51,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-08-06 18:41:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:51,652 INFO L225 Difference]: With dead ends: 70133 [2021-08-06 18:41:51,652 INFO L226 Difference]: Without dead ends: 70133 [2021-08-06 18:41:51,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 18:41:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70133 states. [2021-08-06 18:41:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70133 to 58417. [2021-08-06 18:41:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58417 states, 58409 states have (on average 1.2161995582872502) internal successors, (71037), 58416 states have internal predecessors, (71037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58417 states to 58417 states and 71037 transitions. [2021-08-06 18:41:52,455 INFO L78 Accepts]: Start accepts. Automaton has 58417 states and 71037 transitions. Word has length 374 [2021-08-06 18:41:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:52,456 INFO L470 AbstractCegarLoop]: Abstraction has 58417 states and 71037 transitions. [2021-08-06 18:41:52,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 58417 states and 71037 transitions. [2021-08-06 18:41:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-08-06 18:41:52,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:52,530 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:41:52,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 18:41:52,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-06 18:41:52,730 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:41:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1501829735, now seen corresponding path program 24 times [2021-08-06 18:41:52,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:52,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256237330] [2021-08-06 18:41:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:52,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:41:53,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:53,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256237330] [2021-08-06 18:41:53,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256237330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:53,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8601950] [2021-08-06 18:41:53,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:41:53,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:53,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:53,341 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:53,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 18:41:59,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 18:41:59,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:41:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:01,699 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:01,700 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:42:01,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8601950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:01,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:01,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-08-06 18:42:01,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021888546] [2021-08-06 18:42:01,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:42:01,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:01,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:42:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:42:01,727 INFO L87 Difference]: Start difference. First operand 58417 states and 71037 transitions. Second operand has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:02,169 INFO L93 Difference]: Finished difference Result 71789 states and 86119 transitions. [2021-08-06 18:42:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:42:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-08-06 18:42:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:02,272 INFO L225 Difference]: With dead ends: 71789 [2021-08-06 18:42:02,272 INFO L226 Difference]: Without dead ends: 71789 [2021-08-06 18:42:02,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 18:42:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71789 states. [2021-08-06 18:42:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71789 to 60357. [2021-08-06 18:42:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60357 states, 60349 states have (on average 1.2164410346484615) internal successors, (73411), 60356 states have internal predecessors, (73411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60357 states to 60357 states and 73411 transitions. [2021-08-06 18:42:03,108 INFO L78 Accepts]: Start accepts. Automaton has 60357 states and 73411 transitions. Word has length 374 [2021-08-06 18:42:03,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:03,108 INFO L470 AbstractCegarLoop]: Abstraction has 60357 states and 73411 transitions. [2021-08-06 18:42:03,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:03,108 INFO L276 IsEmpty]: Start isEmpty. Operand 60357 states and 73411 transitions. [2021-08-06 18:42:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-08-06 18:42:03,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:03,183 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:42:03,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 18:42:03,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:03,383 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:42:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:03,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1646811781, now seen corresponding path program 25 times [2021-08-06 18:42:03,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:03,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602429301] [2021-08-06 18:42:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:03,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:42:03,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:03,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602429301] [2021-08-06 18:42:03,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602429301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:03,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470794922] [2021-08-06 18:42:03,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:42:03,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:03,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:03,649 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:03,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 18:42:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:10,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:42:10,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:12,151 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:12,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:42:12,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470794922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:12,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:12,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-08-06 18:42:12,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858135170] [2021-08-06 18:42:12,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:42:12,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:12,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:42:12,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:42:12,178 INFO L87 Difference]: Start difference. First operand 60357 states and 73411 transitions. Second operand has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:12,633 INFO L93 Difference]: Finished difference Result 70133 states and 84199 transitions. [2021-08-06 18:42:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:42:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-08-06 18:42:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:12,730 INFO L225 Difference]: With dead ends: 70133 [2021-08-06 18:42:12,730 INFO L226 Difference]: Without dead ends: 70133 [2021-08-06 18:42:12,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 18:42:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70133 states. [2021-08-06 18:42:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70133 to 60357. [2021-08-06 18:42:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60357 states, 60349 states have (on average 1.2164410346484615) internal successors, (73411), 60356 states have internal predecessors, (73411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60357 states to 60357 states and 73411 transitions. [2021-08-06 18:42:13,645 INFO L78 Accepts]: Start accepts. Automaton has 60357 states and 73411 transitions. Word has length 374 [2021-08-06 18:42:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:13,645 INFO L470 AbstractCegarLoop]: Abstraction has 60357 states and 73411 transitions. [2021-08-06 18:42:13,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 60357 states and 73411 transitions. [2021-08-06 18:42:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-08-06 18:42:13,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:13,722 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:42:13,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 18:42:13,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:13,923 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:42:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:13,924 INFO L82 PathProgramCache]: Analyzing trace with hash 44153049, now seen corresponding path program 26 times [2021-08-06 18:42:13,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:13,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442358292] [2021-08-06 18:42:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:13,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:42:14,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:14,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442358292] [2021-08-06 18:42:14,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442358292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:14,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080977669] [2021-08-06 18:42:14,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:42:14,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:14,385 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:14,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 18:42:20,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:42:20,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:42:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:22,689 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:22,690 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1068 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-06 18:42:22,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080977669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:22,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:22,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-08-06 18:42:22,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302490043] [2021-08-06 18:42:22,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:42:22,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:22,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:42:22,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:42:22,717 INFO L87 Difference]: Start difference. First operand 60357 states and 73411 transitions. Second operand has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:23,200 INFO L93 Difference]: Finished difference Result 70988 states and 85407 transitions. [2021-08-06 18:42:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 18:42:23,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-08-06 18:42:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:23,296 INFO L225 Difference]: With dead ends: 70988 [2021-08-06 18:42:23,296 INFO L226 Difference]: Without dead ends: 70988 [2021-08-06 18:42:23,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=412, Invalid=1228, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 18:42:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70988 states. [2021-08-06 18:42:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70988 to 59157. [2021-08-06 18:42:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59157 states, 59149 states have (on average 1.216301205430354) internal successors, (71943), 59156 states have internal predecessors, (71943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59157 states to 59157 states and 71943 transitions. [2021-08-06 18:42:24,036 INFO L78 Accepts]: Start accepts. Automaton has 59157 states and 71943 transitions. Word has length 374 [2021-08-06 18:42:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:24,036 INFO L470 AbstractCegarLoop]: Abstraction has 59157 states and 71943 transitions. [2021-08-06 18:42:24,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.7) internal successors, (394), 20 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 59157 states and 71943 transitions. [2021-08-06 18:42:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-08-06 18:42:24,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:24,111 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:42:24,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 18:42:24,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 18:42:24,311 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:42:24,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:24,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1566781917, now seen corresponding path program 10 times [2021-08-06 18:42:24,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:24,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919021444] [2021-08-06 18:42:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:24,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:25,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:25,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919021444] [2021-08-06 18:42:25,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919021444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:25,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661109698] [2021-08-06 18:42:25,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:42:25,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:25,010 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:25,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 18:42:32,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:42:32,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:32,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:42:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:33,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:33,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:33,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661109698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:33,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:33,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-08-06 18:42:33,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113404994] [2021-08-06 18:42:33,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:33,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:33,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:33,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:33,919 INFO L87 Difference]: Start difference. First operand 59157 states and 71943 transitions. Second operand has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:34,530 INFO L93 Difference]: Finished difference Result 66231 states and 80020 transitions. [2021-08-06 18:42:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:42:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 404 [2021-08-06 18:42:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:34,629 INFO L225 Difference]: With dead ends: 66231 [2021-08-06 18:42:34,629 INFO L226 Difference]: Without dead ends: 66231 [2021-08-06 18:42:34,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 18:42:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66231 states. [2021-08-06 18:42:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66231 to 61707. [2021-08-06 18:42:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61707 states, 61699 states have (on average 1.215821974424221) internal successors, (75015), 61706 states have internal predecessors, (75015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61707 states to 61707 states and 75015 transitions. [2021-08-06 18:42:35,397 INFO L78 Accepts]: Start accepts. Automaton has 61707 states and 75015 transitions. Word has length 404 [2021-08-06 18:42:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:35,397 INFO L470 AbstractCegarLoop]: Abstraction has 61707 states and 75015 transitions. [2021-08-06 18:42:35,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 61707 states and 75015 transitions. [2021-08-06 18:42:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-08-06 18:42:35,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:35,474 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:42:35,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 18:42:35,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:35,675 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:42:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash -361299027, now seen corresponding path program 22 times [2021-08-06 18:42:35,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:35,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14485151] [2021-08-06 18:42:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:35,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 858 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-06 18:42:36,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:36,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14485151] [2021-08-06 18:42:36,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14485151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:36,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264454333] [2021-08-06 18:42:36,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:42:36,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:36,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:36,233 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:36,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 18:42:43,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:42:43,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:43,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:42:43,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:45,099 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:45,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 834 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-06 18:42:45,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264454333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:45,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:45,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-06 18:42:45,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695742319] [2021-08-06 18:42:45,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:42:45,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:42:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:42:45,126 INFO L87 Difference]: Start difference. First operand 61707 states and 75015 transitions. Second operand has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:45,517 INFO L93 Difference]: Finished difference Result 72362 states and 86473 transitions. [2021-08-06 18:42:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:42:45,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-08-06 18:42:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:45,621 INFO L225 Difference]: With dead ends: 72362 [2021-08-06 18:42:45,621 INFO L226 Difference]: Without dead ends: 72362 [2021-08-06 18:42:45,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:42:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72362 states. [2021-08-06 18:42:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72362 to 56227. [2021-08-06 18:42:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56227 states, 56219 states have (on average 1.2148561874099504) internal successors, (68298), 56226 states have internal predecessors, (68298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56227 states to 56227 states and 68298 transitions. [2021-08-06 18:42:46,395 INFO L78 Accepts]: Start accepts. Automaton has 56227 states and 68298 transitions. Word has length 407 [2021-08-06 18:42:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:46,395 INFO L470 AbstractCegarLoop]: Abstraction has 56227 states and 68298 transitions. [2021-08-06 18:42:46,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 56227 states and 68298 transitions. [2021-08-06 18:42:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-08-06 18:42:46,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:46,468 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:42:46,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 18:42:46,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 18:42:46,668 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:42:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash -779091645, now seen corresponding path program 23 times [2021-08-06 18:42:46,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:46,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991372128] [2021-08-06 18:42:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:46,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 858 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-06 18:42:47,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:47,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991372128] [2021-08-06 18:42:47,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991372128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:47,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766443015] [2021-08-06 18:42:47,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:42:47,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:47,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:47,211 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:47,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 18:42:54,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 18:42:54,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:42:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:56,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:56,316 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:42:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 834 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-06 18:42:56,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766443015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:56,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:56,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-06 18:42:56,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811416498] [2021-08-06 18:42:56,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:42:56,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:42:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:42:56,342 INFO L87 Difference]: Start difference. First operand 56227 states and 68298 transitions. Second operand has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:56,728 INFO L93 Difference]: Finished difference Result 78761 states and 94564 transitions. [2021-08-06 18:42:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:42:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-08-06 18:42:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:56,847 INFO L225 Difference]: With dead ends: 78761 [2021-08-06 18:42:56,847 INFO L226 Difference]: Without dead ends: 78761 [2021-08-06 18:42:56,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:42:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78761 states. [2021-08-06 18:42:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78761 to 57427. [2021-08-06 18:42:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57427 states, 57419 states have (on average 1.2150333513296991) internal successors, (69766), 57426 states have internal predecessors, (69766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57427 states to 57427 states and 69766 transitions. [2021-08-06 18:42:57,715 INFO L78 Accepts]: Start accepts. Automaton has 57427 states and 69766 transitions. Word has length 407 [2021-08-06 18:42:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:57,716 INFO L470 AbstractCegarLoop]: Abstraction has 57427 states and 69766 transitions. [2021-08-06 18:42:57,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 57427 states and 69766 transitions. [2021-08-06 18:42:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-08-06 18:42:57,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:57,787 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:42:57,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 18:42:57,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-06 18:42:57,988 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:42:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash 507085017, now seen corresponding path program 24 times [2021-08-06 18:42:57,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:57,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383280583] [2021-08-06 18:42:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:57,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 858 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-06 18:42:58,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:58,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383280583] [2021-08-06 18:42:58,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383280583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:58,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419502409] [2021-08-06 18:42:58,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:42:58,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:58,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:58,504 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:58,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 18:43:05,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 18:43:05,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:43:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:43:05,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:07,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:07,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 834 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-06 18:43:07,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419502409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:07,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:07,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-08-06 18:43:07,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667367834] [2021-08-06 18:43:07,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:43:07,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:43:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:43:07,674 INFO L87 Difference]: Start difference. First operand 57427 states and 69766 transitions. Second operand has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:08,068 INFO L93 Difference]: Finished difference Result 79092 states and 95026 transitions. [2021-08-06 18:43:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:43:08,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-08-06 18:43:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:08,182 INFO L225 Difference]: With dead ends: 79092 [2021-08-06 18:43:08,182 INFO L226 Difference]: Without dead ends: 79092 [2021-08-06 18:43:08,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:43:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79092 states. [2021-08-06 18:43:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79092 to 59367. [2021-08-06 18:43:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59367 states, 59359 states have (on average 1.215316969625499) internal successors, (72140), 59366 states have internal predecessors, (72140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59367 states to 59367 states and 72140 transitions. [2021-08-06 18:43:09,085 INFO L78 Accepts]: Start accepts. Automaton has 59367 states and 72140 transitions. Word has length 407 [2021-08-06 18:43:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:09,085 INFO L470 AbstractCegarLoop]: Abstraction has 59367 states and 72140 transitions. [2021-08-06 18:43:09,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 59367 states and 72140 transitions. [2021-08-06 18:43:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-08-06 18:43:09,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:09,160 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:43:09,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 18:43:09,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:09,361 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:43:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1805600823, now seen corresponding path program 25 times [2021-08-06 18:43:09,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:09,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519081614] [2021-08-06 18:43:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:09,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 834 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-06 18:43:09,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:09,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519081614] [2021-08-06 18:43:09,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519081614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:09,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188736862] [2021-08-06 18:43:09,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:43:09,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:09,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:09,548 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:09,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 18:43:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:43:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:19,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:19,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 834 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-06 18:43:19,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188736862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:19,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:19,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-06 18:43:19,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812167884] [2021-08-06 18:43:19,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:43:19,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:19,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:43:19,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:43:19,085 INFO L87 Difference]: Start difference. First operand 59367 states and 72140 transitions. Second operand has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:19,471 INFO L93 Difference]: Finished difference Result 89523 states and 107277 transitions. [2021-08-06 18:43:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:43:19,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-08-06 18:43:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:19,601 INFO L225 Difference]: With dead ends: 89523 [2021-08-06 18:43:19,602 INFO L226 Difference]: Without dead ends: 89523 [2021-08-06 18:43:19,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:43:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89523 states. [2021-08-06 18:43:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89523 to 66907. [2021-08-06 18:43:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66907 states, 66899 states have (on average 1.2165802179404774) internal successors, (81388), 66906 states have internal predecessors, (81388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66907 states to 66907 states and 81388 transitions. [2021-08-06 18:43:20,682 INFO L78 Accepts]: Start accepts. Automaton has 66907 states and 81388 transitions. Word has length 407 [2021-08-06 18:43:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:20,683 INFO L470 AbstractCegarLoop]: Abstraction has 66907 states and 81388 transitions. [2021-08-06 18:43:20,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 66907 states and 81388 transitions. [2021-08-06 18:43:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-08-06 18:43:20,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:20,765 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:43:20,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 18:43:20,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:20,966 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:43:20,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:20,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1495027636, now seen corresponding path program 26 times [2021-08-06 18:43:20,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:20,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920621765] [2021-08-06 18:43:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:20,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:43:21,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:21,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920621765] [2021-08-06 18:43:21,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920621765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:21,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557682585] [2021-08-06 18:43:21,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:43:21,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:21,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:21,193 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:21,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 18:43:29,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:43:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:43:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:43:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:30,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:30,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:43:30,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557682585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:30,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:30,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-08-06 18:43:30,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496217370] [2021-08-06 18:43:30,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:43:30,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:30,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:43:30,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:43:30,963 INFO L87 Difference]: Start difference. First operand 66907 states and 81388 transitions. Second operand has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:31,419 INFO L93 Difference]: Finished difference Result 79146 states and 94886 transitions. [2021-08-06 18:43:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:43:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-08-06 18:43:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:31,532 INFO L225 Difference]: With dead ends: 79146 [2021-08-06 18:43:31,532 INFO L226 Difference]: Without dead ends: 79146 [2021-08-06 18:43:31,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:43:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79146 states. [2021-08-06 18:43:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79146 to 63767. [2021-08-06 18:43:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63767 states, 63759 states have (on average 1.2162361392117191) internal successors, (77546), 63766 states have internal predecessors, (77546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63767 states to 63767 states and 77546 transitions. [2021-08-06 18:43:32,428 INFO L78 Accepts]: Start accepts. Automaton has 63767 states and 77546 transitions. Word has length 408 [2021-08-06 18:43:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:32,429 INFO L470 AbstractCegarLoop]: Abstraction has 63767 states and 77546 transitions. [2021-08-06 18:43:32,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 63767 states and 77546 transitions. [2021-08-06 18:43:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-08-06 18:43:32,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:32,509 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:43:32,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 18:43:32,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 18:43:32,710 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:43:32,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:32,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1583168802, now seen corresponding path program 27 times [2021-08-06 18:43:32,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:32,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108018173] [2021-08-06 18:43:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:32,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:43:32,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:32,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108018173] [2021-08-06 18:43:32,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108018173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:32,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112513845] [2021-08-06 18:43:32,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:43:32,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:32,936 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:32,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 18:43:40,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 18:43:40,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:43:40,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:43:40,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:42,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:42,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:43:42,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112513845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:42,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:42,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-08-06 18:43:42,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475530049] [2021-08-06 18:43:42,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:43:42,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:42,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:43:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:43:42,839 INFO L87 Difference]: Start difference. First operand 63767 states and 77546 transitions. Second operand has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:43,307 INFO L93 Difference]: Finished difference Result 86302 states and 103514 transitions. [2021-08-06 18:43:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:43:43,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-08-06 18:43:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:43,539 INFO L225 Difference]: With dead ends: 86302 [2021-08-06 18:43:43,539 INFO L226 Difference]: Without dead ends: 86302 [2021-08-06 18:43:43,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:43:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86302 states. [2021-08-06 18:43:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86302 to 65107. [2021-08-06 18:43:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65107 states, 65099 states have (on average 1.2163934929876035) internal successors, (79186), 65106 states have internal predecessors, (79186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65107 states to 65107 states and 79186 transitions. [2021-08-06 18:43:44,365 INFO L78 Accepts]: Start accepts. Automaton has 65107 states and 79186 transitions. Word has length 408 [2021-08-06 18:43:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:44,365 INFO L470 AbstractCegarLoop]: Abstraction has 65107 states and 79186 transitions. [2021-08-06 18:43:44,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 65107 states and 79186 transitions. [2021-08-06 18:43:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-08-06 18:43:44,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:44,712 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:43:44,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 18:43:44,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 18:43:44,912 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:43:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1652361204, now seen corresponding path program 28 times [2021-08-06 18:43:44,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:44,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874088361] [2021-08-06 18:43:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:44,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:43:45,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:45,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874088361] [2021-08-06 18:43:45,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874088361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:45,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069176730] [2021-08-06 18:43:45,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:43:45,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:45,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:45,163 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:45,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 18:43:53,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:43:53,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:43:53,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:43:53,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:55,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:55,041 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:43:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:43:55,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069176730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:55,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:55,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-08-06 18:43:55,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647357241] [2021-08-06 18:43:55,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:43:55,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:43:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:43:55,068 INFO L87 Difference]: Start difference. First operand 65107 states and 79186 transitions. Second operand has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:55,606 INFO L93 Difference]: Finished difference Result 87179 states and 104768 transitions. [2021-08-06 18:43:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:43:55,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-08-06 18:43:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:55,727 INFO L225 Difference]: With dead ends: 87179 [2021-08-06 18:43:55,728 INFO L226 Difference]: Without dead ends: 87179 [2021-08-06 18:43:55,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 18:43:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87179 states. [2021-08-06 18:43:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87179 to 63767. [2021-08-06 18:43:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63767 states, 63759 states have (on average 1.2162361392117191) internal successors, (77546), 63766 states have internal predecessors, (77546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63767 states to 63767 states and 77546 transitions. [2021-08-06 18:43:56,564 INFO L78 Accepts]: Start accepts. Automaton has 63767 states and 77546 transitions. Word has length 408 [2021-08-06 18:43:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:56,564 INFO L470 AbstractCegarLoop]: Abstraction has 63767 states and 77546 transitions. [2021-08-06 18:43:56,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 63767 states and 77546 transitions. [2021-08-06 18:43:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-08-06 18:43:56,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:56,960 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:43:57,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 18:43:57,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:57,181 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:43:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash -64621922, now seen corresponding path program 29 times [2021-08-06 18:43:57,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:57,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660349232] [2021-08-06 18:43:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:57,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:43:57,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:57,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660349232] [2021-08-06 18:43:57,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660349232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:57,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621496800] [2021-08-06 18:43:57,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:43:57,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:57,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:57,414 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:57,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 18:44:05,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 18:44:05,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:44:05,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:07,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:07,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:44:07,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621496800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:07,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:07,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-08-06 18:44:07,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292684111] [2021-08-06 18:44:07,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:44:07,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:07,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:44:07,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:44:07,440 INFO L87 Difference]: Start difference. First operand 63767 states and 77546 transitions. Second operand has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:07,899 INFO L93 Difference]: Finished difference Result 81283 states and 97782 transitions. [2021-08-06 18:44:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:44:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-08-06 18:44:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:08,013 INFO L225 Difference]: With dead ends: 81283 [2021-08-06 18:44:08,013 INFO L226 Difference]: Without dead ends: 81283 [2021-08-06 18:44:08,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 18:44:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81283 states. [2021-08-06 18:44:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81283 to 64367. [2021-08-06 18:44:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64367 states, 64359 states have (on average 1.2163023042620302) internal successors, (78280), 64366 states have internal predecessors, (78280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64367 states to 64367 states and 78280 transitions. [2021-08-06 18:44:08,926 INFO L78 Accepts]: Start accepts. Automaton has 64367 states and 78280 transitions. Word has length 408 [2021-08-06 18:44:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:08,926 INFO L470 AbstractCegarLoop]: Abstraction has 64367 states and 78280 transitions. [2021-08-06 18:44:08,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 64367 states and 78280 transitions. [2021-08-06 18:44:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-08-06 18:44:09,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:09,008 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:09,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:09,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 18:44:09,208 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:44:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash -482414540, now seen corresponding path program 30 times [2021-08-06 18:44:09,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:09,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013246774] [2021-08-06 18:44:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:09,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-08-06 18:44:09,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:09,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013246774] [2021-08-06 18:44:09,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013246774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:09,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049736226] [2021-08-06 18:44:09,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:44:09,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:09,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:09,436 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:09,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 18:44:17,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 18:44:17,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:44:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:19,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:19,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:44:19,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049736226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:19,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:19,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-08-06 18:44:19,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123171978] [2021-08-06 18:44:19,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:44:19,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:44:19,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:44:19,803 INFO L87 Difference]: Start difference. First operand 64367 states and 78280 transitions. Second operand has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:20,278 INFO L93 Difference]: Finished difference Result 79630 states and 95826 transitions. [2021-08-06 18:44:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 18:44:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-08-06 18:44:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:20,389 INFO L225 Difference]: With dead ends: 79630 [2021-08-06 18:44:20,390 INFO L226 Difference]: Without dead ends: 79630 [2021-08-06 18:44:20,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 18:44:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79630 states. [2021-08-06 18:44:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79630 to 64967. [2021-08-06 18:44:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64967 states, 64959 states have (on average 1.2163672470327438) internal successors, (79014), 64966 states have internal predecessors, (79014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64967 states to 64967 states and 79014 transitions. [2021-08-06 18:44:21,300 INFO L78 Accepts]: Start accepts. Automaton has 64967 states and 79014 transitions. Word has length 408 [2021-08-06 18:44:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:21,300 INFO L470 AbstractCegarLoop]: Abstraction has 64967 states and 79014 transitions. [2021-08-06 18:44:21,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 64967 states and 79014 transitions. [2021-08-06 18:44:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-08-06 18:44:21,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:21,382 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:21,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 18:44:21,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 18:44:21,583 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:44:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:21,583 INFO L82 PathProgramCache]: Analyzing trace with hash 16115520, now seen corresponding path program 31 times [2021-08-06 18:44:21,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:21,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180760777] [2021-08-06 18:44:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:21,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:44:22,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:22,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180760777] [2021-08-06 18:44:22,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180760777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:22,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971946644] [2021-08-06 18:44:22,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:44:22,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:22,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:22,156 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:22,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 18:44:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:30,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:44:30,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:32,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:32,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:44:32,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971946644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:32,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:32,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-06 18:44:32,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031632807] [2021-08-06 18:44:32,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:44:32,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:44:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:44:32,118 INFO L87 Difference]: Start difference. First operand 64967 states and 79014 transitions. Second operand has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:32,559 INFO L93 Difference]: Finished difference Result 80454 states and 96381 transitions. [2021-08-06 18:44:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:44:32,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-08-06 18:44:32,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:32,673 INFO L225 Difference]: With dead ends: 80454 [2021-08-06 18:44:32,673 INFO L226 Difference]: Without dead ends: 80454 [2021-08-06 18:44:32,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 18:44:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80454 states. [2021-08-06 18:44:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80454 to 63287. [2021-08-06 18:44:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63287 states, 63279 states have (on average 1.21634349468228) internal successors, (76969), 63286 states have internal predecessors, (76969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63287 states to 63287 states and 76969 transitions. [2021-08-06 18:44:33,612 INFO L78 Accepts]: Start accepts. Automaton has 63287 states and 76969 transitions. Word has length 408 [2021-08-06 18:44:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:33,612 INFO L470 AbstractCegarLoop]: Abstraction has 63287 states and 76969 transitions. [2021-08-06 18:44:33,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 63287 states and 76969 transitions. [2021-08-06 18:44:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-08-06 18:44:33,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:33,691 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:33,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 18:44:33,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:33,892 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:44:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:33,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1043321770, now seen corresponding path program 32 times [2021-08-06 18:44:33,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:33,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884288160] [2021-08-06 18:44:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:33,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:44:34,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:34,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884288160] [2021-08-06 18:44:34,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884288160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:34,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556735314] [2021-08-06 18:44:34,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:44:34,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:34,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:34,405 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:34,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 18:44:42,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:44:42,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:42,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:44:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:44,470 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:44,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:44:44,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556735314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:44,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:44,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-06 18:44:44,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170893482] [2021-08-06 18:44:44,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:44:44,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:44,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:44:44,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:44:44,497 INFO L87 Difference]: Start difference. First operand 63287 states and 76969 transitions. Second operand has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:45,011 INFO L93 Difference]: Finished difference Result 102378 states and 123071 transitions. [2021-08-06 18:44:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:44:45,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-08-06 18:44:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:45,185 INFO L225 Difference]: With dead ends: 102378 [2021-08-06 18:44:45,185 INFO L226 Difference]: Without dead ends: 102378 [2021-08-06 18:44:45,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 18:44:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102378 states. [2021-08-06 18:44:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102378 to 68507. [2021-08-06 18:44:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68507 states, 68499 states have (on average 1.2169082760332268) internal successors, (83357), 68506 states have internal predecessors, (83357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68507 states to 68507 states and 83357 transitions. [2021-08-06 18:44:46,386 INFO L78 Accepts]: Start accepts. Automaton has 68507 states and 83357 transitions. Word has length 408 [2021-08-06 18:44:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:46,387 INFO L470 AbstractCegarLoop]: Abstraction has 68507 states and 83357 transitions. [2021-08-06 18:44:46,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 68507 states and 83357 transitions. [2021-08-06 18:44:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-08-06 18:44:46,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:46,472 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:46,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 18:44:46,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-08-06 18:44:46,677 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:44:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:46,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1534662400, now seen corresponding path program 33 times [2021-08-06 18:44:46,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:46,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80217451] [2021-08-06 18:44:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:46,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:44:47,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:47,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80217451] [2021-08-06 18:44:47,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80217451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:47,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017430231] [2021-08-06 18:44:47,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:44:47,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:47,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:47,249 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:47,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 18:44:55,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 18:44:55,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:55,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 18:44:55,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:57,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:57,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:44:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:44:57,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017430231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:57,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:57,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-06 18:44:57,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641116670] [2021-08-06 18:44:57,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:44:57,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:57,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:44:57,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:44:57,867 INFO L87 Difference]: Start difference. First operand 68507 states and 83357 transitions. Second operand has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:58,365 INFO L93 Difference]: Finished difference Result 97659 states and 117697 transitions. [2021-08-06 18:44:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:44:58,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-08-06 18:44:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:58,535 INFO L225 Difference]: With dead ends: 97659 [2021-08-06 18:44:58,535 INFO L226 Difference]: Without dead ends: 97659 [2021-08-06 18:44:58,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 18:44:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97659 states. [2021-08-06 18:44:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97659 to 69107. [2021-08-06 18:44:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69107 states, 69099 states have (on average 1.21696406605016) internal successors, (84091), 69106 states have internal predecessors, (84091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69107 states to 69107 states and 84091 transitions. [2021-08-06 18:45:00,062 INFO L78 Accepts]: Start accepts. Automaton has 69107 states and 84091 transitions. Word has length 408 [2021-08-06 18:45:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:00,063 INFO L470 AbstractCegarLoop]: Abstraction has 69107 states and 84091 transitions. [2021-08-06 18:45:00,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.68421052631579) internal successors, (393), 19 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:00,063 INFO L276 IsEmpty]: Start isEmpty. Operand 69107 states and 84091 transitions. [2021-08-06 18:45:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-08-06 18:45:00,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:00,214 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:00,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:00,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:00,429 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 18:45:00,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:00,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1116869782, now seen corresponding path program 34 times [2021-08-06 18:45:00,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:00,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142908670] [2021-08-06 18:45:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:00,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1064 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-06 18:45:00,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:00,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142908670] [2021-08-06 18:45:00,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142908670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:00,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474060377] [2021-08-06 18:45:00,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:45:00,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:00,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:00,781 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:00,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process