/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/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 18:32:43,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 18:32:43,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 18:32:43,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 18:32:43,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 18:32:43,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 18:32:43,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 18:32:43,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 18:32:43,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 18:32:43,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 18:32:43,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 18:32:43,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 18:32:43,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 18:32:43,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 18:32:43,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 18:32:43,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 18:32:43,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 18:32:43,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 18:32:43,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 18:32:43,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 18:32:43,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 18:32:43,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 18:32:43,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 18:32:43,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 18:32:43,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 18:32:43,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 18:32:43,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 18:32:43,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 18:32:43,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 18:32:43,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 18:32:43,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 18:32:43,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 18:32:43,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 18:32:43,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 18:32:43,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 18:32:43,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 18:32:43,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 18:32:43,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 18:32:43,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 18:32:43,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 18:32:43,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 18:32:43,873 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 18:32:43,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 18:32:43,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 18:32:43,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 18:32:43,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 18:32:43,900 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 18:32:43,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 18:32:43,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 18:32:43,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 18:32:43,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 18:32:43,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 18:32:43,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 18:32:43,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 18:32:43,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 18:32:43,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 18:32:43,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 18:32:43,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 18:32:43,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 18:32:43,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 18:32:43,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 18:32:43,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 18:32:43,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 18:32:43,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:32:43,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 18:32:43,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 18:32:43,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 18:32:43,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 18:32:43,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 18:32:43,902 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 18:32:43,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 18:32:43,902 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 18:32:43,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 18:32:44,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 18:32:44,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 18:32:44,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 18:32:44,141 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-06 18:32:44,141 INFO L275 PluginConnector]: CDTParser initialized [2021-08-06 18:32:44,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-08-06 18:32:44,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a99f2a7/b785fe6908d24eef96dcce821b729199/FLAG3bd4d031d [2021-08-06 18:32:45,211 INFO L306 CDTParser]: Found 1 translation units. [2021-08-06 18:32:45,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-08-06 18:32:45,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a99f2a7/b785fe6908d24eef96dcce821b729199/FLAG3bd4d031d [2021-08-06 18:32:45,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a99f2a7/b785fe6908d24eef96dcce821b729199 [2021-08-06 18:32:45,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 18:32:45,447 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-06 18:32:45,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-06 18:32:45,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-06 18:32:45,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-06 18:32:45,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e6d997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45, skipping insertion in model container [2021-08-06 18:32:45,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-06 18:32:45,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-06 18:32:45,683 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/fib_bench_longest-2.i[30286,30299] [2021-08-06 18:32:45,733 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/fib_bench_longest-2.i[31040,31053] [2021-08-06 18:32:45,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:32:45,740 INFO L203 MainTranslator]: Completed pre-run [2021-08-06 18:32:45,774 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/fib_bench_longest-2.i[30286,30299] [2021-08-06 18:32:45,787 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/fib_bench_longest-2.i[31040,31053] [2021-08-06 18:32:45,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:32:45,818 INFO L208 MainTranslator]: Completed translation [2021-08-06 18:32:45,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45 WrapperNode [2021-08-06 18:32:45,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-06 18:32:45,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 18:32:45,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 18:32:45,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 18:32:45,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 18:32:45,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 18:32:45,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 18:32:45,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 18:32:45,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 18:32:45,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 18:32:45,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 18:32:45,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 18:32:45,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:32:45,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:45,918 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 18:32:45,929 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 18:32:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-06 18:32:45,974 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-06 18:32:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-06 18:32:45,974 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-06 18:32:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-06 18:32:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-06 18:32:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-06 18:32:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-06 18:32:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-06 18:32:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-06 18:32:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 18:32:45,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 18:32:45,977 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 18:32:46,225 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 18:32:46,225 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-06 18:32:46,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:32:46 BoogieIcfgContainer [2021-08-06 18:32:46,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 18:32:46,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 18:32:46,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 18:32:46,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 18:32:46,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.08 06:32:45" (1/3) ... [2021-08-06 18:32:46,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1946b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:32:46, skipping insertion in model container [2021-08-06 18:32:46,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (2/3) ... [2021-08-06 18:32:46,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1946b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:32:46, skipping insertion in model container [2021-08-06 18:32:46,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:32:46" (3/3) ... [2021-08-06 18:32:46,232 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2021-08-06 18:32:46,235 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 18:32:46,235 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 18:32:46,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 18:32:46,235 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 18:32:46,254 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,255 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,255 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,255 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,255 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,256 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,256 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,256 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,256 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,256 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,256 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,256 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,257 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,257 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,257 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,257 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,257 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,257 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,257 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,258 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,258 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,258 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,258 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,258 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,258 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,258 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,258 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,260 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,261 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,261 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,261 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,261 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,261 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,261 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,261 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,261 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,261 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,262 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,264 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,264 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,264 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,264 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,264 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,264 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,270 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,270 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,270 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,271 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,271 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,271 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,273 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-06 18:32:46,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 18:32:46,312 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 18:32:46,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 18:32:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 933 states, 850 states have (on average 1.4270588235294117) internal successors, (1213), 932 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states 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 18:32:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 18:32:46,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:46,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:32:46,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:46,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:46,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1527992754, now seen corresponding path program 1 times [2021-08-06 18:32:46,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:46,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749341565] [2021-08-06 18:32:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:46,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:46,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:32:46,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:32:46,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:46,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:46,765 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:46,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:46,838 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 18:32:46,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:46,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749341565] [2021-08-06 18:32:46,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749341565] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:46,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:46,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 18:32:46,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819965821] [2021-08-06 18:32:46,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 18:32:46,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 18:32:46,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 18:32:46,856 INFO L87 Difference]: Start difference. First operand has 933 states, 850 states have (on average 1.4270588235294117) internal successors, (1213), 932 states have internal predecessors, (1213), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:47,007 INFO L93 Difference]: Finished difference Result 1756 states and 2036 transitions. [2021-08-06 18:32:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 18:32:47,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 18:32:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:47,019 INFO L225 Difference]: With dead ends: 1756 [2021-08-06 18:32:47,019 INFO L226 Difference]: Without dead ends: 635 [2021-08-06 18:32:47,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:32:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-06 18:32:47,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 434. [2021-08-06 18:32:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 423 states have (on average 1.3144208037825058) internal successors, (556), 433 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 18:32:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 556 transitions. [2021-08-06 18:32:47,070 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 556 transitions. Word has length 32 [2021-08-06 18:32:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:47,070 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 556 transitions. [2021-08-06 18:32:47,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 556 transitions. [2021-08-06 18:32:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 18:32:47,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:47,072 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] [2021-08-06 18:32:47,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 18:32:47,072 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1321610138, now seen corresponding path program 1 times [2021-08-06 18:32:47,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:47,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915831713] [2021-08-06 18:32:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:47,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:47,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:47,157 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:47,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:47,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:47,219 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 18:32:47,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:47,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915831713] [2021-08-06 18:32:47,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915831713] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:47,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:47,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:32:47,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081306725] [2021-08-06 18:32:47,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:32:47,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:32:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:32:47,222 INFO L87 Difference]: Start difference. First operand 434 states and 556 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:47,348 INFO L93 Difference]: Finished difference Result 859 states and 1082 transitions. [2021-08-06 18:32:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:32:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 18:32:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:47,352 INFO L225 Difference]: With dead ends: 859 [2021-08-06 18:32:47,353 INFO L226 Difference]: Without dead ends: 699 [2021-08-06 18:32:47,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:32:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-08-06 18:32:47,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 476. [2021-08-06 18:32:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 465 states have (on average 1.313978494623656) internal successors, (611), 475 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 18:32:47,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 611 transitions. [2021-08-06 18:32:47,369 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 611 transitions. Word has length 37 [2021-08-06 18:32:47,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:47,369 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 611 transitions. [2021-08-06 18:32:47,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,370 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 611 transitions. [2021-08-06 18:32:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 18:32:47,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:47,371 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] [2021-08-06 18:32:47,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 18:32:47,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:47,371 INFO L82 PathProgramCache]: Analyzing trace with hash 42342464, now seen corresponding path program 1 times [2021-08-06 18:32:47,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:47,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152080650] [2021-08-06 18:32:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:47,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:47,465 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:47,466 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:47,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 81.3 percent of original size [2021-08-06 18:32:47,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 81.3 percent of original size [2021-08-06 18:32:47,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:47,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:47,559 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 18:32:47,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:47,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152080650] [2021-08-06 18:32:47,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152080650] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:47,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:47,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:32:47,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608413818] [2021-08-06 18:32:47,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:32:47,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:32:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:32:47,565 INFO L87 Difference]: Start difference. First operand 476 states and 611 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:47,655 INFO L93 Difference]: Finished difference Result 846 states and 1079 transitions. [2021-08-06 18:32:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:32:47,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 18:32:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:47,658 INFO L225 Difference]: With dead ends: 846 [2021-08-06 18:32:47,658 INFO L226 Difference]: Without dead ends: 726 [2021-08-06 18:32:47,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:32:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-08-06 18:32:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 479. [2021-08-06 18:32:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 468 states have (on average 1.3205128205128205) internal successors, (618), 478 states have internal predecessors, (618), 0 states have call successors, (0), 0 states 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 18:32:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 618 transitions. [2021-08-06 18:32:47,687 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 618 transitions. Word has length 37 [2021-08-06 18:32:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:47,688 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 618 transitions. [2021-08-06 18:32:47,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 618 transitions. [2021-08-06 18:32:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:47,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:47,690 INFO L512 BasicCegarLoop]: trace histogram [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 18:32:47,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 18:32:47,690 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash -564451095, now seen corresponding path program 1 times [2021-08-06 18:32:47,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:47,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097741220] [2021-08-06 18:32:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:47,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:47,811 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:47,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:47,836 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:32:47,840 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:32:47,861 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:47,864 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:47,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:47,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097741220] [2021-08-06 18:32:47,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097741220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:47,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164188801] [2021-08-06 18:32:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:47,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:47,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:47,913 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 18:32:47,936 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 18:32:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:48,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:32:48,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:48,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:48,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:48,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:48,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:48,497 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:48,498 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:48,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164188801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:48,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:48,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 18:32:48,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800090495] [2021-08-06 18:32:48,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:32:48,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:32:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:32:48,508 INFO L87 Difference]: Start difference. First operand 479 states and 618 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:32:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:48,583 INFO L93 Difference]: Finished difference Result 913 states and 1157 transitions. [2021-08-06 18:32:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 18:32:48,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 18:32:48,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:48,586 INFO L225 Difference]: With dead ends: 913 [2021-08-06 18:32:48,586 INFO L226 Difference]: Without dead ends: 753 [2021-08-06 18:32:48,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:32:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-08-06 18:32:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 519. [2021-08-06 18:32:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 508 states have (on average 1.3051181102362204) internal successors, (663), 518 states have internal predecessors, (663), 0 states have call successors, (0), 0 states 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 18:32:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 663 transitions. [2021-08-06 18:32:48,597 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 663 transitions. Word has length 42 [2021-08-06 18:32:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:48,598 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 663 transitions. [2021-08-06 18:32:48,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:32:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 663 transitions. [2021-08-06 18:32:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:48,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:48,605 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] [2021-08-06 18:32:48,633 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 18:32:48,829 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 18:32:48,829 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:48,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:48,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1613099302, now seen corresponding path program 1 times [2021-08-06 18:32:48,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:48,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536511203] [2021-08-06 18:32:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:48,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:48,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:48,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:48,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:48,926 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:48,945 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 18:32:48,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:48,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536511203] [2021-08-06 18:32:48,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536511203] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:48,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:48,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 18:32:48,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884481666] [2021-08-06 18:32:48,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 18:32:48,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 18:32:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:32:48,947 INFO L87 Difference]: Start difference. First operand 519 states and 663 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 18:32:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:49,001 INFO L93 Difference]: Finished difference Result 849 states and 1091 transitions. [2021-08-06 18:32:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 18:32:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 18:32:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:49,003 INFO L225 Difference]: With dead ends: 849 [2021-08-06 18:32:49,003 INFO L226 Difference]: Without dead ends: 769 [2021-08-06 18:32:49,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:32:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-08-06 18:32:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 549. [2021-08-06 18:32:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 538 states have (on average 1.3029739776951672) internal successors, (701), 548 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 18:32:49,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 701 transitions. [2021-08-06 18:32:49,013 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 701 transitions. Word has length 42 [2021-08-06 18:32:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:49,013 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 701 transitions. [2021-08-06 18:32:49,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 18:32:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 701 transitions. [2021-08-06 18:32:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:49,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:49,014 INFO L512 BasicCegarLoop]: trace histogram [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 18:32:49,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 18:32:49,014 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:49,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1113994597, now seen corresponding path program 1 times [2021-08-06 18:32:49,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:49,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674680361] [2021-08-06 18:32:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:49,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:49,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:49,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:49,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:32:49,058 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:32:49,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:32:49,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:32:49,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:49,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:49,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:49,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674680361] [2021-08-06 18:32:49,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674680361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:49,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81176292] [2021-08-06 18:32:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:49,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:49,108 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 18:32:49,112 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 18:32:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:49,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:32:49,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:49,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:49,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:49,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:49,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:49,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81176292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:49,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:49,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 18:32:49,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051832220] [2021-08-06 18:32:49,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:32:49,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:49,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:32:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:32:49,610 INFO L87 Difference]: Start difference. First operand 549 states and 701 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 18:32:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:49,748 INFO L93 Difference]: Finished difference Result 1101 states and 1390 transitions. [2021-08-06 18:32:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 18:32:49,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 18:32:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:49,753 INFO L225 Difference]: With dead ends: 1101 [2021-08-06 18:32:49,753 INFO L226 Difference]: Without dead ends: 941 [2021-08-06 18:32:49,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:32:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-08-06 18:32:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 559. [2021-08-06 18:32:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 548 states have (on average 1.3193430656934306) internal successors, (723), 558 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 18:32:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 723 transitions. [2021-08-06 18:32:49,763 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 723 transitions. Word has length 42 [2021-08-06 18:32:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:49,763 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 723 transitions. [2021-08-06 18:32:49,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 18:32:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 723 transitions. [2021-08-06 18:32:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:49,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:49,765 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] [2021-08-06 18:32:49,782 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 18:32:49,980 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 18:32:49,981 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1293748584, now seen corresponding path program 2 times [2021-08-06 18:32:49,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:49,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273436261] [2021-08-06 18:32:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:49,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:50,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 50.0 percent of original size [2021-08-06 18:32:50,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 50.0 percent of original size [2021-08-06 18:32:50,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 18:32:50,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 18:32:50,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:50,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:50,088 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 18:32:50,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:50,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273436261] [2021-08-06 18:32:50,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273436261] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:50,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:50,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 18:32:50,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538893739] [2021-08-06 18:32:50,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 18:32:50,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 18:32:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:32:50,090 INFO L87 Difference]: Start difference. First operand 559 states and 723 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 18:32:50,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:50,147 INFO L93 Difference]: Finished difference Result 919 states and 1181 transitions. [2021-08-06 18:32:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:32:50,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 18:32:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:50,150 INFO L225 Difference]: With dead ends: 919 [2021-08-06 18:32:50,150 INFO L226 Difference]: Without dead ends: 839 [2021-08-06 18:32:50,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:32:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-08-06 18:32:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 559. [2021-08-06 18:32:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 548 states have (on average 1.3193430656934306) internal successors, (723), 558 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 18:32:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 723 transitions. [2021-08-06 18:32:50,160 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 723 transitions. Word has length 42 [2021-08-06 18:32:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:50,160 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 723 transitions. [2021-08-06 18:32:50,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 18:32:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 723 transitions. [2021-08-06 18:32:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:50,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:50,161 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] [2021-08-06 18:32:50,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 18:32:50,162 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:50,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:50,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1709216126, now seen corresponding path program 3 times [2021-08-06 18:32:50,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:50,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92357860] [2021-08-06 18:32:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:50,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:50,211 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 50.0 percent of original size [2021-08-06 18:32:50,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 50.0 percent of original size [2021-08-06 18:32:50,220 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:50,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:50,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:50,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:50,247 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 18:32:50,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:50,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92357860] [2021-08-06 18:32:50,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92357860] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:50,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:50,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 18:32:50,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101318157] [2021-08-06 18:32:50,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 18:32:50,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:50,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 18:32:50,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:32:50,249 INFO L87 Difference]: Start difference. First operand 559 states and 723 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 18:32:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:50,355 INFO L93 Difference]: Finished difference Result 1036 states and 1338 transitions. [2021-08-06 18:32:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:32:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 18:32:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:50,357 INFO L225 Difference]: With dead ends: 1036 [2021-08-06 18:32:50,357 INFO L226 Difference]: Without dead ends: 916 [2021-08-06 18:32:50,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:32:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-08-06 18:32:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 574. [2021-08-06 18:32:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 563 states have (on average 1.3179396092362345) internal successors, (742), 573 states have internal predecessors, (742), 0 states have call successors, (0), 0 states 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 18:32:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 742 transitions. [2021-08-06 18:32:50,368 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 742 transitions. Word has length 42 [2021-08-06 18:32:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:50,369 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 742 transitions. [2021-08-06 18:32:50,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 18:32:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 742 transitions. [2021-08-06 18:32:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:50,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:50,370 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:32:50,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 18:32:50,370 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:50,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:50,370 INFO L82 PathProgramCache]: Analyzing trace with hash -193384890, now seen corresponding path program 2 times [2021-08-06 18:32:50,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:50,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970333487] [2021-08-06 18:32:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:50,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:50,412 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:50,413 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:50,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:32:50,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:32:50,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 18:32:50,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 18:32:50,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:50,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:50,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:50,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970333487] [2021-08-06 18:32:50,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970333487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:50,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498639432] [2021-08-06 18:32:50,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:32:50,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:50,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:50,486 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 18:32:50,487 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 18:32:50,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:32:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:32:50,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:32:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:50,815 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:50,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:51,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:51,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:51,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:51,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:51,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498639432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:51,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:51,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 18:32:51,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875895499] [2021-08-06 18:32:51,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:32:51,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:51,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:32:51,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:32:51,051 INFO L87 Difference]: Start difference. First operand 574 states and 742 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:32:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:51,122 INFO L93 Difference]: Finished difference Result 1058 states and 1347 transitions. [2021-08-06 18:32:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 18:32:51,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 18:32:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:51,125 INFO L225 Difference]: With dead ends: 1058 [2021-08-06 18:32:51,125 INFO L226 Difference]: Without dead ends: 898 [2021-08-06 18:32:51,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:32:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-08-06 18:32:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 614. [2021-08-06 18:32:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 603 states have (on average 1.3051409618573797) internal successors, (787), 613 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 18:32:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 787 transitions. [2021-08-06 18:32:51,135 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 787 transitions. Word has length 47 [2021-08-06 18:32:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:51,135 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 787 transitions. [2021-08-06 18:32:51,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 18:32:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 787 transitions. [2021-08-06 18:32:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:51,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:51,136 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:32:51,155 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 18:32:51,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:51,349 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:51,349 INFO L82 PathProgramCache]: Analyzing trace with hash 401743887, now seen corresponding path program 1 times [2021-08-06 18:32:51,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:51,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755835677] [2021-08-06 18:32:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:51,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:51,384 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:51,385 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:51,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:51,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:51,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:51,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755835677] [2021-08-06 18:32:51,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755835677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:51,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412307042] [2021-08-06 18:32:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:51,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:51,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:51,434 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 18:32:51,435 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 18:32:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:51,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:32:51,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:51,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:51,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:52,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:52,136 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:52,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412307042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:52,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:52,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 18:32:52,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592623620] [2021-08-06 18:32:52,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:32:52,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:52,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:32:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:32:52,141 INFO L87 Difference]: Start difference. First operand 614 states and 787 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 18:32:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:52,249 INFO L93 Difference]: Finished difference Result 1026 states and 1313 transitions. [2021-08-06 18:32:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 18:32:52,250 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 18:32:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:52,252 INFO L225 Difference]: With dead ends: 1026 [2021-08-06 18:32:52,252 INFO L226 Difference]: Without dead ends: 946 [2021-08-06 18:32:52,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:32:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-08-06 18:32:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 619. [2021-08-06 18:32:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 608 states have (on average 1.3125) internal successors, (798), 618 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 18:32:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 798 transitions. [2021-08-06 18:32:52,262 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 798 transitions. Word has length 47 [2021-08-06 18:32:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:52,263 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 798 transitions. [2021-08-06 18:32:52,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 18:32:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 798 transitions. [2021-08-06 18:32:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:52,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:52,264 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:32:52,289 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 18:32:52,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:52,480 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1304230871, now seen corresponding path program 1 times [2021-08-06 18:32:52,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:52,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396915805] [2021-08-06 18:32:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:52,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:52,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:52,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:52,545 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:52,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:52,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:52,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396915805] [2021-08-06 18:32:52,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396915805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:52,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026217058] [2021-08-06 18:32:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:52,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:52,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:52,566 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 18:32:52,581 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 18:32:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:52,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:32:52,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:52,958 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:52,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:53,205 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:53,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:53,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026217058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:53,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:53,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 18:32:53,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723899004] [2021-08-06 18:32:53,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:32:53,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:53,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:32:53,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:32:53,212 INFO L87 Difference]: Start difference. First operand 619 states and 798 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 18:32:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:53,381 INFO L93 Difference]: Finished difference Result 1298 states and 1640 transitions. [2021-08-06 18:32:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:32:53,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 18:32:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:53,385 INFO L225 Difference]: With dead ends: 1298 [2021-08-06 18:32:53,385 INFO L226 Difference]: Without dead ends: 1098 [2021-08-06 18:32:53,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:32:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-08-06 18:32:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 693. [2021-08-06 18:32:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 682 states have (on average 1.2932551319648093) internal successors, (882), 692 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 18:32:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 882 transitions. [2021-08-06 18:32:53,398 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 882 transitions. Word has length 47 [2021-08-06 18:32:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:53,398 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 882 transitions. [2021-08-06 18:32:53,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 18:32:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 882 transitions. [2021-08-06 18:32:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:53,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:53,399 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:32:53,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 18:32:53,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 18:32:53,613 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1167557917, now seen corresponding path program 2 times [2021-08-06 18:32:53,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:53,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006064511] [2021-08-06 18:32:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:53,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:53,682 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:32:53,685 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:32:53,694 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:32:53,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:32:53,707 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:53,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:53,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:53,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006064511] [2021-08-06 18:32:53,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006064511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:53,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752816603] [2021-08-06 18:32:53,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:32:53,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:53,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:53,734 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 18:32:53,735 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 18:32:53,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:32:53,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:32:53,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:32:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:54,334 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:54,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:54,343 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:54,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:54,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752816603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:54,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:54,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 18:32:54,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619534369] [2021-08-06 18:32:54,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:32:54,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:54,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:32:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:32:54,349 INFO L87 Difference]: Start difference. First operand 693 states and 882 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 18:32:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:54,435 INFO L93 Difference]: Finished difference Result 1182 states and 1490 transitions. [2021-08-06 18:32:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:32:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 18:32:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:54,438 INFO L225 Difference]: With dead ends: 1182 [2021-08-06 18:32:54,439 INFO L226 Difference]: Without dead ends: 1102 [2021-08-06 18:32:54,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:32:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-08-06 18:32:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 698. [2021-08-06 18:32:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 687 states have (on average 1.299854439592431) internal successors, (893), 697 states have internal predecessors, (893), 0 states have call successors, (0), 0 states 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 18:32:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 893 transitions. [2021-08-06 18:32:54,450 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 893 transitions. Word has length 47 [2021-08-06 18:32:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:54,450 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 893 transitions. [2021-08-06 18:32:54,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 18:32:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 893 transitions. [2021-08-06 18:32:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:54,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:54,451 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:32:54,470 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 18:32:54,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:54,665 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash -124444669, now seen corresponding path program 3 times [2021-08-06 18:32:54,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:54,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261642064] [2021-08-06 18:32:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:54,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:54,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:32:54,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:32:54,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:54,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:54,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:54,735 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:54,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:54,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261642064] [2021-08-06 18:32:54,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261642064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:54,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184142748] [2021-08-06 18:32:54,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:32:54,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:54,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:54,754 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 18:32:54,796 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 18:32:55,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 18:32:55,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:32:55,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:32:55,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:55,377 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:55,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:55,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:55,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:55,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184142748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:55,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:55,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 18:32:55,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274648960] [2021-08-06 18:32:55,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:32:55,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:55,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:32:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:32:55,392 INFO L87 Difference]: Start difference. First operand 698 states and 893 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 18:32:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:55,674 INFO L93 Difference]: Finished difference Result 1644 states and 2110 transitions. [2021-08-06 18:32:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:32:55,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 18:32:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:55,678 INFO L225 Difference]: With dead ends: 1644 [2021-08-06 18:32:55,678 INFO L226 Difference]: Without dead ends: 1404 [2021-08-06 18:32:55,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:32:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-08-06 18:32:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 689. [2021-08-06 18:32:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 678 states have (on average 1.2979351032448379) internal successors, (880), 688 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 18:32:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 880 transitions. [2021-08-06 18:32:55,692 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 880 transitions. Word has length 47 [2021-08-06 18:32:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:55,692 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 880 transitions. [2021-08-06 18:32:55,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 18:32:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 880 transitions. [2021-08-06 18:32:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:55,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:55,693 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:32:55,712 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 18:32:55,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:55,909 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash 620538359, now seen corresponding path program 2 times [2021-08-06 18:32:55,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:55,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888750380] [2021-08-06 18:32:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:55,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:55,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:55,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:55,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:55,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:55,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:55,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888750380] [2021-08-06 18:32:55,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888750380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:55,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572544728] [2021-08-06 18:32:55,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:32:55,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:55,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:56,001 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 18:32:56,051 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 18:32:56,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:32:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:32:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:32:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:56,700 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:56,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:56,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:56,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:56,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572544728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:56,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:56,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 18:32:56,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130285615] [2021-08-06 18:32:56,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:32:56,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:56,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:32:56,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:32:56,721 INFO L87 Difference]: Start difference. First operand 689 states and 880 transitions. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 18:32:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:56,952 INFO L93 Difference]: Finished difference Result 1655 states and 2129 transitions. [2021-08-06 18:32:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:32:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 18:32:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:56,956 INFO L225 Difference]: With dead ends: 1655 [2021-08-06 18:32:56,956 INFO L226 Difference]: Without dead ends: 1415 [2021-08-06 18:32:56,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:32:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-08-06 18:32:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 709. [2021-08-06 18:32:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 698 states have (on average 1.2951289398280803) internal successors, (904), 708 states have internal predecessors, (904), 0 states have call successors, (0), 0 states 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 18:32:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 904 transitions. [2021-08-06 18:32:56,969 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 904 transitions. Word has length 47 [2021-08-06 18:32:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:56,969 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 904 transitions. [2021-08-06 18:32:56,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 18:32:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 904 transitions. [2021-08-06 18:32:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:32:56,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:56,970 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:32:56,991 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 18:32:57,180 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,SelfDestructingSolverStorable13 [2021-08-06 18:32:57,181 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1814813382, now seen corresponding path program 4 times [2021-08-06 18:32:57,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:57,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393994714] [2021-08-06 18:32:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:57,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:57,218 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:57,219 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:57,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:57,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:57,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:57,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393994714] [2021-08-06 18:32:57,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393994714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:57,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013030854] [2021-08-06 18:32:57,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:32:57,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:57,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:57,290 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 18:32:57,290 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 18:32:57,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:32:57,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:32:57,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:32:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:57,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:57,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:58,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:58,226 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:58,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013030854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:58,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:58,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 18:32:58,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643691225] [2021-08-06 18:32:58,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:32:58,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:32:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:32:58,233 INFO L87 Difference]: Start difference. First operand 709 states and 904 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 18:32:58,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:58,333 INFO L93 Difference]: Finished difference Result 1266 states and 1604 transitions. [2021-08-06 18:32:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 18:32:58,334 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:32:58,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:58,337 INFO L225 Difference]: With dead ends: 1266 [2021-08-06 18:32:58,337 INFO L226 Difference]: Without dead ends: 1186 [2021-08-06 18:32:58,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:32:58,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-08-06 18:32:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 743. [2021-08-06 18:32:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 732 states have (on average 1.3087431693989071) internal successors, (958), 742 states have internal predecessors, (958), 0 states have call successors, (0), 0 states 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 18:32:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 958 transitions. [2021-08-06 18:32:58,351 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 958 transitions. Word has length 52 [2021-08-06 18:32:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:58,351 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 958 transitions. [2021-08-06 18:32:58,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 18:32:58,351 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 958 transitions. [2021-08-06 18:32:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:32:58,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:58,352 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:32:58,372 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 18:32:58,570 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,SelfDestructingSolverStorable14 [2021-08-06 18:32:58,570 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:58,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:58,571 INFO L82 PathProgramCache]: Analyzing trace with hash 437395792, now seen corresponding path program 1 times [2021-08-06 18:32:58,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:58,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014434628] [2021-08-06 18:32:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:58,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:58,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:58,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:58,642 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:58,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:58,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:58,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014434628] [2021-08-06 18:32:58,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014434628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:58,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763828153] [2021-08-06 18:32:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:58,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:58,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:58,673 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 18:32:58,704 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 18:32:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:59,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:32:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:59,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:59,220 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:59,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:59,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:59,499 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:59,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:59,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763828153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:59,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:59,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 18:32:59,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724832465] [2021-08-06 18:32:59,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:32:59,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:59,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:32:59,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:32:59,504 INFO L87 Difference]: Start difference. First operand 743 states and 958 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 18:32:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:59,698 INFO L93 Difference]: Finished difference Result 1418 states and 1780 transitions. [2021-08-06 18:32:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:32:59,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:32:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:59,701 INFO L225 Difference]: With dead ends: 1418 [2021-08-06 18:32:59,701 INFO L226 Difference]: Without dead ends: 1338 [2021-08-06 18:32:59,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:32:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-08-06 18:32:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 782. [2021-08-06 18:32:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 771 states have (on average 1.3073929961089494) internal successors, (1008), 781 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 18:32:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1008 transitions. [2021-08-06 18:32:59,716 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1008 transitions. Word has length 52 [2021-08-06 18:32:59,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:59,717 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1008 transitions. [2021-08-06 18:32:59,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 18:32:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1008 transitions. [2021-08-06 18:32:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:32:59,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:59,718 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:32:59,737 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 18:32:59,928 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,SelfDestructingSolverStorable15 [2021-08-06 18:32:59,929 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1997471382, now seen corresponding path program 3 times [2021-08-06 18:32:59,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:59,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045505894] [2021-08-06 18:32:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:59,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:59,983 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:59,984 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:59,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:32:59,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:00,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:00,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:00,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:00,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045505894] [2021-08-06 18:33:00,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045505894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:00,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611722549] [2021-08-06 18:33:00,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:00,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:00,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:00,043 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 18:33:00,044 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 18:33:00,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:33:00,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:00,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:00,630 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:00,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:00,975 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:00,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:00,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611722549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:00,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:00,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 18:33:00,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19396281] [2021-08-06 18:33:00,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:33:00,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:33:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:33:00,980 INFO L87 Difference]: Start difference. First operand 782 states and 1008 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 18:33:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:01,228 INFO L93 Difference]: Finished difference Result 1642 states and 2061 transitions. [2021-08-06 18:33:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:33:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:01,232 INFO L225 Difference]: With dead ends: 1642 [2021-08-06 18:33:01,232 INFO L226 Difference]: Without dead ends: 1402 [2021-08-06 18:33:01,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:33:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-08-06 18:33:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 863. [2021-08-06 18:33:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 852 states have (on average 1.2863849765258215) internal successors, (1096), 862 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 18:33:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1096 transitions. [2021-08-06 18:33:01,243 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1096 transitions. Word has length 52 [2021-08-06 18:33:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:01,243 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1096 transitions. [2021-08-06 18:33:01,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 18:33:01,243 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1096 transitions. [2021-08-06 18:33:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:01,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:01,244 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:33:01,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-06 18:33:01,457 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,SelfDestructingSolverStorable16 [2021-08-06 18:33:01,457 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:01,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2127096389, now seen corresponding path program 2 times [2021-08-06 18:33:01,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:01,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939727216] [2021-08-06 18:33:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:01,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:01,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:01,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:01,490 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:01,491 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:01,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:01,498 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:01,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:01,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:01,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:33:01,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:33:01,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:01,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:01,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:01,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939727216] [2021-08-06 18:33:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939727216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:01,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836632381] [2021-08-06 18:33:01,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:01,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:01,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:01,545 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 18:33:01,568 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 18:33:01,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:01,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:01,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:02,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:02,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:02,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:02,404 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:02,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836632381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:02,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:02,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 18:33:02,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361495463] [2021-08-06 18:33:02,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:33:02,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:33:02,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:33:02,410 INFO L87 Difference]: Start difference. First operand 863 states and 1096 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 18:33:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:02,586 INFO L93 Difference]: Finished difference Result 1538 states and 1917 transitions. [2021-08-06 18:33:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:33:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:02,590 INFO L225 Difference]: With dead ends: 1538 [2021-08-06 18:33:02,590 INFO L226 Difference]: Without dead ends: 1378 [2021-08-06 18:33:02,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-08-06 18:33:02,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-08-06 18:33:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 873. [2021-08-06 18:33:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 862 states have (on average 1.296983758700696) internal successors, (1118), 872 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states 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 18:33:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1118 transitions. [2021-08-06 18:33:02,601 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1118 transitions. Word has length 52 [2021-08-06 18:33:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:02,601 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1118 transitions. [2021-08-06 18:33:02,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 18:33:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1118 transitions. [2021-08-06 18:33:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:02,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:02,602 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:33:02,622 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 18:33:02,820 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,SelfDestructingSolverStorable17 [2021-08-06 18:33:02,820 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1988116920, now seen corresponding path program 5 times [2021-08-06 18:33:02,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:02,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919598706] [2021-08-06 18:33:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:02,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:02,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:02,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:02,883 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:02,884 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:02,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:02,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:02,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:02,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919598706] [2021-08-06 18:33:02,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919598706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:02,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678849535] [2021-08-06 18:33:02,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:33:02,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:02,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:02,925 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 18:33:02,945 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 18:33:03,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:33:03,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:03,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:03,885 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:03,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:03,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678849535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:03,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:03,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 18:33:03,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739740378] [2021-08-06 18:33:03,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:33:03,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:33:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:33:03,891 INFO L87 Difference]: Start difference. First operand 873 states and 1118 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 18:33:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:04,035 INFO L93 Difference]: Finished difference Result 1476 states and 1852 transitions. [2021-08-06 18:33:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:33:04,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:04,039 INFO L225 Difference]: With dead ends: 1476 [2021-08-06 18:33:04,039 INFO L226 Difference]: Without dead ends: 1396 [2021-08-06 18:33:04,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:33:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-08-06 18:33:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 868. [2021-08-06 18:33:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 857 states have (on average 1.2917152858809802) internal successors, (1107), 867 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states 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 18:33:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1107 transitions. [2021-08-06 18:33:04,049 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1107 transitions. Word has length 52 [2021-08-06 18:33:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:04,049 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1107 transitions. [2021-08-06 18:33:04,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 18:33:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1107 transitions. [2021-08-06 18:33:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:04,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:04,050 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:33:04,070 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 18:33:04,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:04,264 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:04,264 INFO L82 PathProgramCache]: Analyzing trace with hash 696114334, now seen corresponding path program 6 times [2021-08-06 18:33:04,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:04,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378720572] [2021-08-06 18:33:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:04,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:04,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:04,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:04,317 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:04,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:04,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:04,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:04,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:04,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378720572] [2021-08-06 18:33:04,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378720572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:04,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012832581] [2021-08-06 18:33:04,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:33:04,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:04,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:04,350 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 18:33:04,351 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 18:33:04,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:33:04,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:04,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:05,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:05,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:05,259 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:05,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:05,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012832581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:05,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:05,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 18:33:05,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442427542] [2021-08-06 18:33:05,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:33:05,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:33:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:33:05,264 INFO L87 Difference]: Start difference. First operand 868 states and 1107 transitions. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 18:33:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:05,565 INFO L93 Difference]: Finished difference Result 2022 states and 2578 transitions. [2021-08-06 18:33:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:33:05,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:05,569 INFO L225 Difference]: With dead ends: 2022 [2021-08-06 18:33:05,569 INFO L226 Difference]: Without dead ends: 1782 [2021-08-06 18:33:05,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:33:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-08-06 18:33:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 849. [2021-08-06 18:33:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 838 states have (on average 1.295942720763723) internal successors, (1086), 848 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 18:33:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1086 transitions. [2021-08-06 18:33:05,581 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1086 transitions. Word has length 52 [2021-08-06 18:33:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:05,581 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1086 transitions. [2021-08-06 18:33:05,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 18:33:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1086 transitions. [2021-08-06 18:33:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:05,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:05,582 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:33:05,603 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 18:33:05,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:05,797 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:05,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1441097362, now seen corresponding path program 2 times [2021-08-06 18:33:05,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:05,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945349375] [2021-08-06 18:33:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:05,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:05,842 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:05,843 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:05,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:05,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:05,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:05,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:05,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:05,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945349375] [2021-08-06 18:33:05,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945349375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:05,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131396068] [2021-08-06 18:33:05,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:05,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:05,879 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 18:33:05,880 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 18:33:06,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:06,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:06,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:06,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:06,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:06,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:06,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:06,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131396068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:06,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:06,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 18:33:06,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158590362] [2021-08-06 18:33:06,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:33:06,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:33:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:33:06,864 INFO L87 Difference]: Start difference. First operand 849 states and 1086 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 18:33:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:07,396 INFO L93 Difference]: Finished difference Result 1987 states and 2497 transitions. [2021-08-06 18:33:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:33:07,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:07,400 INFO L225 Difference]: With dead ends: 1987 [2021-08-06 18:33:07,400 INFO L226 Difference]: Without dead ends: 1827 [2021-08-06 18:33:07,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 488.0ms TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 18:33:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-08-06 18:33:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 904. [2021-08-06 18:33:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 893 states have (on average 1.2933930571108623) internal successors, (1155), 903 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states 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 18:33:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1155 transitions. [2021-08-06 18:33:07,413 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1155 transitions. Word has length 52 [2021-08-06 18:33:07,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:07,413 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1155 transitions. [2021-08-06 18:33:07,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 18:33:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1155 transitions. [2021-08-06 18:33:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:07,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:07,414 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:33:07,433 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 18:33:07,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:07,621 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash 945842004, now seen corresponding path program 3 times [2021-08-06 18:33:07,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:07,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084185876] [2021-08-06 18:33:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:07,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:07,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:07,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:07,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:07,676 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:07,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:07,685 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:07,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:07,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084185876] [2021-08-06 18:33:07,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084185876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:07,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289445918] [2021-08-06 18:33:07,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:07,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:07,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:07,704 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 18:33:07,709 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 18:33:08,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 18:33:08,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:08,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:08,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:08,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:08,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:08,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:08,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:08,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:08,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289445918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:08,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:08,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 18:33:08,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835480093] [2021-08-06 18:33:08,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:33:08,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:08,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:33:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:33:08,689 INFO L87 Difference]: Start difference. First operand 904 states and 1155 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 18:33:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:09,219 INFO L93 Difference]: Finished difference Result 2165 states and 2733 transitions. [2021-08-06 18:33:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 18:33:09,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:09,225 INFO L225 Difference]: With dead ends: 2165 [2021-08-06 18:33:09,225 INFO L226 Difference]: Without dead ends: 2005 [2021-08-06 18:33:09,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 18:33:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-08-06 18:33:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 939. [2021-08-06 18:33:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 928 states have (on average 1.293103448275862) internal successors, (1200), 938 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 18:33:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1200 transitions. [2021-08-06 18:33:09,238 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1200 transitions. Word has length 52 [2021-08-06 18:33:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:09,239 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1200 transitions. [2021-08-06 18:33:09,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 18:33:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1200 transitions. [2021-08-06 18:33:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:09,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:09,240 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:33:09,268 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 18:33:09,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 18:33:09,453 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1899838063, now seen corresponding path program 7 times [2021-08-06 18:33:09,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:09,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665365074] [2021-08-06 18:33:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:09,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:09,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:09,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:09,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:09,557 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:09,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:09,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665365074] [2021-08-06 18:33:09,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665365074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:09,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392774221] [2021-08-06 18:33:09,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:33:09,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:09,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:09,578 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 18:33:09,596 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 18:33:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:10,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:10,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:10,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:10,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:10,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:10,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:10,748 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:10,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:10,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392774221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:10,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:10,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 18:33:10,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390656598] [2021-08-06 18:33:10,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:33:10,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:33:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:33:10,755 INFO L87 Difference]: Start difference. First operand 939 states and 1200 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 18:33:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:10,829 INFO L93 Difference]: Finished difference Result 1525 states and 1933 transitions. [2021-08-06 18:33:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 18:33:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:10,835 INFO L225 Difference]: With dead ends: 1525 [2021-08-06 18:33:10,835 INFO L226 Difference]: Without dead ends: 1445 [2021-08-06 18:33:10,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:33:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-08-06 18:33:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 978. [2021-08-06 18:33:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 967 states have (on average 1.3081695966907962) internal successors, (1265), 977 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states 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 18:33:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1265 transitions. [2021-08-06 18:33:10,846 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1265 transitions. Word has length 57 [2021-08-06 18:33:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:10,846 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1265 transitions. [2021-08-06 18:33:10,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 18:33:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1265 transitions. [2021-08-06 18:33:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:10,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:10,847 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-06 18:33:10,865 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 18:33:11,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:11,049 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:11,049 INFO L82 PathProgramCache]: Analyzing trace with hash 522420473, now seen corresponding path program 4 times [2021-08-06 18:33:11,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:11,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94730421] [2021-08-06 18:33:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:11,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:11,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:11,083 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:11,130 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:11,130 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:11,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:11,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94730421] [2021-08-06 18:33:11,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94730421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:11,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620469451] [2021-08-06 18:33:11,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:33:11,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:11,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:11,155 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 18:33:11,156 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 18:33:11,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:33:11,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:11,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:11,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:11,984 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:11,985 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:12,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:12,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620469451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:12,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:12,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:12,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179419727] [2021-08-06 18:33:12,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:12,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:12,401 INFO L87 Difference]: Start difference. First operand 978 states and 1265 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:12,716 INFO L93 Difference]: Finished difference Result 1781 states and 2237 transitions. [2021-08-06 18:33:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:33:12,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:12,720 INFO L225 Difference]: With dead ends: 1781 [2021-08-06 18:33:12,720 INFO L226 Difference]: Without dead ends: 1701 [2021-08-06 18:33:12,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:33:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-08-06 18:33:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 978. [2021-08-06 18:33:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 967 states have (on average 1.3081695966907962) internal successors, (1265), 977 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states 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 18:33:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1265 transitions. [2021-08-06 18:33:12,735 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1265 transitions. Word has length 57 [2021-08-06 18:33:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:12,735 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1265 transitions. [2021-08-06 18:33:12,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1265 transitions. [2021-08-06 18:33:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:12,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:12,736 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-06 18:33:12,767 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 18:33:12,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:12,965 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1148685949, now seen corresponding path program 5 times [2021-08-06 18:33:12,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:12,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437365694] [2021-08-06 18:33:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:12,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:13,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:13,006 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:13,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:13,055 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:13,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:13,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437365694] [2021-08-06 18:33:13,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437365694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:13,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443083646] [2021-08-06 18:33:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:33:13,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:13,081 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 18:33:13,108 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 18:33:13,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:33:13,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:13,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:13,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:13,988 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:13,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:14,363 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:14,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:14,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443083646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:14,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:14,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:14,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894949133] [2021-08-06 18:33:14,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:14,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:14,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:14,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:14,369 INFO L87 Difference]: Start difference. First operand 978 states and 1265 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:14,713 INFO L93 Difference]: Finished difference Result 2061 states and 2580 transitions. [2021-08-06 18:33:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:33:14,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:14,717 INFO L225 Difference]: With dead ends: 2061 [2021-08-06 18:33:14,717 INFO L226 Difference]: Without dead ends: 1861 [2021-08-06 18:33:14,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=301, Invalid=959, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 18:33:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-08-06 18:33:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1067. [2021-08-06 18:33:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1056 states have (on average 1.300189393939394) internal successors, (1373), 1066 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states 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 18:33:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1373 transitions. [2021-08-06 18:33:14,731 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1373 transitions. Word has length 57 [2021-08-06 18:33:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:14,731 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1373 transitions. [2021-08-06 18:33:14,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1373 transitions. [2021-08-06 18:33:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:14,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:14,732 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-06 18:33:14,753 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 18:33:14,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:14,949 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2082496063, now seen corresponding path program 6 times [2021-08-06 18:33:14,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:14,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824797240] [2021-08-06 18:33:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:14,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:14,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:14,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:15,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:15,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:15,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:15,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824797240] [2021-08-06 18:33:15,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824797240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:15,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892803923] [2021-08-06 18:33:15,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:33:15,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:15,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:15,052 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 18:33:15,054 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 18:33:15,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:33:15,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:15,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:15,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:16,350 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:16,350 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:16,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892803923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:16,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:16,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:16,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178699164] [2021-08-06 18:33:16,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:16,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:16,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:16,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:16,356 INFO L87 Difference]: Start difference. First operand 1067 states and 1373 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:16,645 INFO L93 Difference]: Finished difference Result 2021 states and 2522 transitions. [2021-08-06 18:33:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:33:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:16,648 INFO L225 Difference]: With dead ends: 2021 [2021-08-06 18:33:16,648 INFO L226 Difference]: Without dead ends: 1941 [2021-08-06 18:33:16,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:33:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-08-06 18:33:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1082. [2021-08-06 18:33:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1071 states have (on average 1.2987861811391224) internal successors, (1391), 1081 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states 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 18:33:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1391 transitions. [2021-08-06 18:33:16,661 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1391 transitions. Word has length 57 [2021-08-06 18:33:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:16,661 INFO L470 AbstractCegarLoop]: Abstraction has 1082 states and 1391 transitions. [2021-08-06 18:33:16,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1391 transitions. [2021-08-06 18:33:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:16,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:16,663 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-06 18:33:16,684 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 18:33:16,888 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,SelfDestructingSolverStorable25 [2021-08-06 18:33:16,888 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:16,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2025722963, now seen corresponding path program 7 times [2021-08-06 18:33:16,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:16,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970162449] [2021-08-06 18:33:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:16,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:16,919 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:16,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:16,929 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:16,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:16,968 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:16,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:16,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:16,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970162449] [2021-08-06 18:33:16,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970162449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:16,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623343847] [2021-08-06 18:33:16,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:33:16,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:16,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:16,990 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 18:33:16,992 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 18:33:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:17,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:17,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:17,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:18,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:18,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:18,293 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:18,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:18,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623343847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:18,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:18,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:18,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541551978] [2021-08-06 18:33:18,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:18,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:18,299 INFO L87 Difference]: Start difference. First operand 1082 states and 1391 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:18,511 INFO L93 Difference]: Finished difference Result 2010 states and 2517 transitions. [2021-08-06 18:33:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:33:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:18,514 INFO L225 Difference]: With dead ends: 2010 [2021-08-06 18:33:18,514 INFO L226 Difference]: Without dead ends: 1930 [2021-08-06 18:33:18,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:33:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-08-06 18:33:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1062. [2021-08-06 18:33:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1051 states have (on average 1.295908658420552) internal successors, (1362), 1061 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 18:33:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1362 transitions. [2021-08-06 18:33:18,526 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1362 transitions. Word has length 57 [2021-08-06 18:33:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:18,526 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1362 transitions. [2021-08-06 18:33:18,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1362 transitions. [2021-08-06 18:33:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:18,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:18,527 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:33:18,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 18:33:18,738 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,SelfDestructingSolverStorable26 [2021-08-06 18:33:18,738 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1848389117, now seen corresponding path program 8 times [2021-08-06 18:33:18,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:18,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040386290] [2021-08-06 18:33:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:18,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:18,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:18,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:18,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:18,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:18,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:18,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:18,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:18,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040386290] [2021-08-06 18:33:18,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040386290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:18,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831842386] [2021-08-06 18:33:18,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:18,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:18,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:18,842 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 18:33:18,863 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 18:33:19,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:19,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:19,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:33:19,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:20,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:20,107 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:20,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:20,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:20,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831842386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:20,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:20,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-06 18:33:20,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778612152] [2021-08-06 18:33:20,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:33:20,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:33:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:33:20,121 INFO L87 Difference]: Start difference. First operand 1062 states and 1362 transitions. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 18:33:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:20,239 INFO L93 Difference]: Finished difference Result 1711 states and 2140 transitions. [2021-08-06 18:33:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:33:20,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:20,242 INFO L225 Difference]: With dead ends: 1711 [2021-08-06 18:33:20,242 INFO L226 Difference]: Without dead ends: 1631 [2021-08-06 18:33:20,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-08-06 18:33:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1057. [2021-08-06 18:33:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1046 states have (on average 1.2915869980879542) internal successors, (1351), 1056 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states 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 18:33:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1351 transitions. [2021-08-06 18:33:20,253 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1351 transitions. Word has length 57 [2021-08-06 18:33:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:20,253 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1351 transitions. [2021-08-06 18:33:20,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 18:33:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1351 transitions. [2021-08-06 18:33:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:20,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:20,254 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:33:20,272 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 18:33:20,457 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,SelfDestructingSolverStorable27 [2021-08-06 18:33:20,457 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 556386531, now seen corresponding path program 9 times [2021-08-06 18:33:20,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:20,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474088630] [2021-08-06 18:33:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:20,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:20,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:20,512 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:20,520 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:20,521 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:20,530 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:20,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:20,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:20,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474088630] [2021-08-06 18:33:20,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474088630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:20,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701514684] [2021-08-06 18:33:20,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:20,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:20,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:20,550 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 18:33:20,580 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 18:33:21,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:33:21,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:21,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:33:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:21,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:21,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:21,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:21,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:21,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701514684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:21,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:21,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-06 18:33:21,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147463593] [2021-08-06 18:33:21,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:33:21,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:33:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:33:21,834 INFO L87 Difference]: Start difference. First operand 1057 states and 1351 transitions. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 18:33:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:22,077 INFO L93 Difference]: Finished difference Result 2135 states and 2680 transitions. [2021-08-06 18:33:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:33:22,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:22,080 INFO L225 Difference]: With dead ends: 2135 [2021-08-06 18:33:22,080 INFO L226 Difference]: Without dead ends: 1975 [2021-08-06 18:33:22,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:33:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-08-06 18:33:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1059. [2021-08-06 18:33:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1048 states have (on average 1.291030534351145) internal successors, (1353), 1058 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states 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 18:33:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1353 transitions. [2021-08-06 18:33:22,092 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1353 transitions. Word has length 57 [2021-08-06 18:33:22,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:22,092 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 1353 transitions. [2021-08-06 18:33:22,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 18:33:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1353 transitions. [2021-08-06 18:33:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:22,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:22,093 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-06 18:33:22,112 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 18:33:22,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:22,295 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:22,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1301369559, now seen corresponding path program 8 times [2021-08-06 18:33:22,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:22,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183086903] [2021-08-06 18:33:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:22,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:22,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:33:22,350 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:33:22,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:22,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:22,370 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:22,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:22,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:22,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183086903] [2021-08-06 18:33:22,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183086903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:22,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447739601] [2021-08-06 18:33:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:22,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:22,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:22,392 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 18:33:22,392 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 18:33:23,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:23,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:23,869 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:23,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:23,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447739601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:23,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:23,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:23,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40422753] [2021-08-06 18:33:23,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:23,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:23,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:23,875 INFO L87 Difference]: Start difference. First operand 1059 states and 1353 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:24,633 INFO L93 Difference]: Finished difference Result 2615 states and 3306 transitions. [2021-08-06 18:33:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 18:33:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:24,636 INFO L225 Difference]: With dead ends: 2615 [2021-08-06 18:33:24,637 INFO L226 Difference]: Without dead ends: 2375 [2021-08-06 18:33:24,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 708.1ms TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 18:33:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-08-06 18:33:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1112. [2021-08-06 18:33:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1101 states have (on average 1.2824704813805632) internal successors, (1412), 1111 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states 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 18:33:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1412 transitions. [2021-08-06 18:33:24,651 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1412 transitions. Word has length 57 [2021-08-06 18:33:24,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:24,651 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1412 transitions. [2021-08-06 18:33:24,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1412 transitions. [2021-08-06 18:33:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:24,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:24,652 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-06 18:33:24,672 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 18:33:24,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:24,869 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:24,869 INFO L82 PathProgramCache]: Analyzing trace with hash -759237165, now seen corresponding path program 9 times [2021-08-06 18:33:24,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:24,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243777513] [2021-08-06 18:33:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:24,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:24,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:33:24,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:33:24,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:24,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:24,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:24,961 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:24,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:24,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243777513] [2021-08-06 18:33:24,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243777513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:24,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016476454] [2021-08-06 18:33:24,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:24,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:24,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:24,986 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 18:33:24,987 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 18:33:25,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:33:25,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:33:25,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:26,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:26,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:26,366 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:26,367 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016476454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:26,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:26,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 18:33:26,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972133565] [2021-08-06 18:33:26,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:33:26,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:26,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:33:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:33:26,371 INFO L87 Difference]: Start difference. First operand 1112 states and 1412 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 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 18:33:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:26,957 INFO L93 Difference]: Finished difference Result 2986 states and 3765 transitions. [2021-08-06 18:33:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 18:33:26,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 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 57 [2021-08-06 18:33:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:26,961 INFO L225 Difference]: With dead ends: 2986 [2021-08-06 18:33:26,961 INFO L226 Difference]: Without dead ends: 2746 [2021-08-06 18:33:26,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 519.0ms TimeCoverageRelationStatistics Valid=456, Invalid=1896, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 18:33:26,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-08-06 18:33:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1162. [2021-08-06 18:33:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1151 states have (on average 1.2806255430060818) internal successors, (1474), 1161 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states 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 18:33:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1474 transitions. [2021-08-06 18:33:26,985 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1474 transitions. Word has length 57 [2021-08-06 18:33:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:26,985 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1474 transitions. [2021-08-06 18:33:26,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 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 18:33:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1474 transitions. [2021-08-06 18:33:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:26,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:26,987 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-06 18:33:27,007 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 18:33:27,200 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,SelfDestructingSolverStorable30 [2021-08-06 18:33:27,201 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:27,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1923817235, now seen corresponding path program 10 times [2021-08-06 18:33:27,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:27,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590444407] [2021-08-06 18:33:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:27,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:27,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:27,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:27,260 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:27,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:27,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:27,270 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:27,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:27,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:27,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:27,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590444407] [2021-08-06 18:33:27,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590444407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:27,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258973520] [2021-08-06 18:33:27,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:33:27,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:27,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:27,299 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 18:33:27,302 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 18:33:28,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:33:28,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:28,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:28,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:33:28,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:33:28,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:28,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:28,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258973520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:28,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:28,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:28,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275160235] [2021-08-06 18:33:28,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:28,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:28,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:28,744 INFO L87 Difference]: Start difference. First operand 1162 states and 1474 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:29,683 INFO L93 Difference]: Finished difference Result 3278 states and 4108 transitions. [2021-08-06 18:33:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 18:33:29,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:29,692 INFO L225 Difference]: With dead ends: 3278 [2021-08-06 18:33:29,692 INFO L226 Difference]: Without dead ends: 2958 [2021-08-06 18:33:29,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 838.4ms TimeCoverageRelationStatistics Valid=923, Invalid=3499, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 18:33:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2021-08-06 18:33:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 1250. [2021-08-06 18:33:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1239 states have (on average 1.2800645682001615) internal successors, (1586), 1249 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states 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 18:33:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1586 transitions. [2021-08-06 18:33:29,709 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1586 transitions. Word has length 57 [2021-08-06 18:33:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:29,709 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1586 transitions. [2021-08-06 18:33:29,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1586 transitions. [2021-08-06 18:33:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:29,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:29,710 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-06 18:33:29,730 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 18:33:29,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-06 18:33:29,925 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1607616345, now seen corresponding path program 11 times [2021-08-06 18:33:29,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:29,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713858847] [2021-08-06 18:33:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:29,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:29,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:29,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:29,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:29,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:29,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:29,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:30,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:30,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713858847] [2021-08-06 18:33:30,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713858847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:30,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605993799] [2021-08-06 18:33:30,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:33:30,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:30,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:30,016 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 18:33:30,017 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 18:33:31,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:33:31,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:31,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:31,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:31,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:31,558 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:31,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605993799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:31,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:31,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:31,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52576822] [2021-08-06 18:33:31,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:31,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:31,563 INFO L87 Difference]: Start difference. First operand 1250 states and 1586 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:32,066 INFO L93 Difference]: Finished difference Result 2927 states and 3715 transitions. [2021-08-06 18:33:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 18:33:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:32,070 INFO L225 Difference]: With dead ends: 2927 [2021-08-06 18:33:32,070 INFO L226 Difference]: Without dead ends: 2687 [2021-08-06 18:33:32,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 475.8ms TimeCoverageRelationStatistics Valid=433, Invalid=1637, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 18:33:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-08-06 18:33:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1255. [2021-08-06 18:33:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1244 states have (on average 1.2837620578778135) internal successors, (1597), 1254 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states 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 18:33:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1597 transitions. [2021-08-06 18:33:32,085 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1597 transitions. Word has length 57 [2021-08-06 18:33:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:32,085 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 1597 transitions. [2021-08-06 18:33:32,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1597 transitions. [2021-08-06 18:33:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:32,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:32,087 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-08-06 18:33:32,107 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 18:33:32,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:32,301 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:32,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 731004006, now seen corresponding path program 10 times [2021-08-06 18:33:32,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:32,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114123274] [2021-08-06 18:33:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:32,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:32,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:32,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:32,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:32,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:32,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:32,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114123274] [2021-08-06 18:33:32,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114123274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:32,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800509295] [2021-08-06 18:33:32,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:33:32,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:32,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:32,422 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 18:33:32,424 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 18:33:33,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:33:33,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:33,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:33,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:33,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:34,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:34,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:34,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800509295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:34,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:34,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:34,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119141971] [2021-08-06 18:33:34,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:34,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:34,127 INFO L87 Difference]: Start difference. First operand 1255 states and 1597 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:34,231 INFO L93 Difference]: Finished difference Result 2158 states and 2720 transitions. [2021-08-06 18:33:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 18:33:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:34,251 INFO L225 Difference]: With dead ends: 2158 [2021-08-06 18:33:34,251 INFO L226 Difference]: Without dead ends: 2078 [2021-08-06 18:33:34,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:33:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-08-06 18:33:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1275. [2021-08-06 18:33:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1264 states have (on average 1.298259493670886) internal successors, (1641), 1274 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states 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 18:33:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 1641 transitions. [2021-08-06 18:33:34,264 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 1641 transitions. Word has length 62 [2021-08-06 18:33:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:34,264 INFO L470 AbstractCegarLoop]: Abstraction has 1275 states and 1641 transitions. [2021-08-06 18:33:34,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 1641 transitions. [2021-08-06 18:33:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:34,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:34,266 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:33:34,286 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 18:33:34,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:34,481 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash -974970752, now seen corresponding path program 12 times [2021-08-06 18:33:34,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:34,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918506172] [2021-08-06 18:33:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:34,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:34,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:34,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:34,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:34,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:34,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:34,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918506172] [2021-08-06 18:33:34,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918506172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:34,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435628688] [2021-08-06 18:33:34,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:33:34,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:34,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:34,602 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 18:33:34,603 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 18:33:35,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:33:35,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:35,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:35,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:35,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:35,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:36,341 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:36,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:36,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435628688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:36,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:36,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:36,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422681285] [2021-08-06 18:33:36,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:36,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:36,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:36,347 INFO L87 Difference]: Start difference. First operand 1275 states and 1641 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:36,551 INFO L93 Difference]: Finished difference Result 2263 states and 2855 transitions. [2021-08-06 18:33:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:33:36,551 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:36,554 INFO L225 Difference]: With dead ends: 2263 [2021-08-06 18:33:36,554 INFO L226 Difference]: Without dead ends: 2183 [2021-08-06 18:33:36,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:33:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-08-06 18:33:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1270. [2021-08-06 18:33:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1259 states have (on average 1.294678316123908) internal successors, (1630), 1269 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states 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 18:33:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1630 transitions. [2021-08-06 18:33:36,565 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1630 transitions. Word has length 62 [2021-08-06 18:33:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:36,566 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1630 transitions. [2021-08-06 18:33:36,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1630 transitions. [2021-08-06 18:33:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:36,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:36,567 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:33:36,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 18:33:36,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:36,767 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:36,768 INFO L82 PathProgramCache]: Analyzing trace with hash -646413584, now seen corresponding path program 13 times [2021-08-06 18:33:36,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:36,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659503387] [2021-08-06 18:33:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:36,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:36,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:36,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:36,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:36,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:36,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:36,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659503387] [2021-08-06 18:33:36,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659503387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:36,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042192191] [2021-08-06 18:33:36,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:33:36,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:36,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:36,891 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 18:33:36,936 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 18:33:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:38,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:38,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:38,238 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:38,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:38,769 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:38,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:38,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042192191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:38,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:38,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:38,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021185944] [2021-08-06 18:33:38,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:38,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:38,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:38,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:38,775 INFO L87 Difference]: Start difference. First operand 1270 states and 1630 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:39,104 INFO L93 Difference]: Finished difference Result 2402 states and 3020 transitions. [2021-08-06 18:33:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:33:39,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:39,107 INFO L225 Difference]: With dead ends: 2402 [2021-08-06 18:33:39,107 INFO L226 Difference]: Without dead ends: 2322 [2021-08-06 18:33:39,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:33:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-08-06 18:33:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1280. [2021-08-06 18:33:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1269 states have (on average 1.2923561859732073) internal successors, (1640), 1279 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states 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 18:33:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1640 transitions. [2021-08-06 18:33:39,119 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1640 transitions. Word has length 62 [2021-08-06 18:33:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:39,119 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1640 transitions. [2021-08-06 18:33:39,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1640 transitions. [2021-08-06 18:33:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:39,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:39,121 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 18:33:39,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 18:33:39,321 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,SelfDestructingSolverStorable35 [2021-08-06 18:33:39,321 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash 913662006, now seen corresponding path program 14 times [2021-08-06 18:33:39,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:39,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550051646] [2021-08-06 18:33:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:39,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:39,353 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:39,354 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:39,418 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:39,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:39,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:39,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550051646] [2021-08-06 18:33:39,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550051646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:39,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849885644] [2021-08-06 18:33:39,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:39,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:39,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:39,445 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 18:33:39,472 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 18:33:40,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:40,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:40,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:40,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:41,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:41,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:41,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849885644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:41,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:41,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:41,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295192534] [2021-08-06 18:33:41,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:41,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:41,375 INFO L87 Difference]: Start difference. First operand 1280 states and 1640 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:41,744 INFO L93 Difference]: Finished difference Result 2522 states and 3164 transitions. [2021-08-06 18:33:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:33:41,747 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:41,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:41,749 INFO L225 Difference]: With dead ends: 2522 [2021-08-06 18:33:41,749 INFO L226 Difference]: Without dead ends: 2442 [2021-08-06 18:33:41,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:33:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-08-06 18:33:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 1305. [2021-08-06 18:33:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1294 states have (on average 1.2913446676970635) internal successors, (1671), 1304 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states 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 18:33:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1671 transitions. [2021-08-06 18:33:41,762 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1671 transitions. Word has length 62 [2021-08-06 18:33:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:41,762 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 1671 transitions. [2021-08-06 18:33:41,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1671 transitions. [2021-08-06 18:33:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:41,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:41,764 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:33:41,785 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 18:33:41,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 18:33:41,976 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:41,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1440818482, now seen corresponding path program 15 times [2021-08-06 18:33:41,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:41,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864845695] [2021-08-06 18:33:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:41,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:42,031 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:42,032 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:42,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:42,086 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:42,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:42,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864845695] [2021-08-06 18:33:42,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864845695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:42,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415028026] [2021-08-06 18:33:42,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:42,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:42,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:42,108 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 18:33:42,110 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 18:33:43,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:33:43,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:43,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:43,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:43,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:43,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:44,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:44,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:44,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415028026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:44,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:44,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:44,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81056397] [2021-08-06 18:33:44,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:44,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:44,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:44,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:44,027 INFO L87 Difference]: Start difference. First operand 1305 states and 1671 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:44,511 INFO L93 Difference]: Finished difference Result 2833 states and 3540 transitions. [2021-08-06 18:33:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:33:44,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:44,514 INFO L225 Difference]: With dead ends: 2833 [2021-08-06 18:33:44,514 INFO L226 Difference]: Without dead ends: 2633 [2021-08-06 18:33:44,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=433, Invalid=1373, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 18:33:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-08-06 18:33:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1394. [2021-08-06 18:33:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1383 states have (on average 1.2863340563991323) internal successors, (1779), 1393 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states 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 18:33:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1779 transitions. [2021-08-06 18:33:44,527 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1779 transitions. Word has length 62 [2021-08-06 18:33:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:44,527 INFO L470 AbstractCegarLoop]: Abstraction has 1394 states and 1779 transitions. [2021-08-06 18:33:44,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1779 transitions. [2021-08-06 18:33:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:44,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:44,529 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 18:33:44,550 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 18:33:44,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 18:33:44,748 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:44,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1100410276, now seen corresponding path program 16 times [2021-08-06 18:33:44,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:44,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679318861] [2021-08-06 18:33:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:44,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:44,791 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:44,792 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:44,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:44,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:44,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:44,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679318861] [2021-08-06 18:33:44,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679318861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:44,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77264562] [2021-08-06 18:33:44,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:33:44,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:44,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:44,877 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 18:33:44,878 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 18:33:46,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:33:46,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:46,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:46,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:46,367 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:46,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:46,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:46,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:46,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77264562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:46,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:46,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:46,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756749138] [2021-08-06 18:33:46,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:46,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:46,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:46,780 INFO L87 Difference]: Start difference. First operand 1394 states and 1779 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:47,185 INFO L93 Difference]: Finished difference Result 2723 states and 3392 transitions. [2021-08-06 18:33:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 18:33:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:47,188 INFO L225 Difference]: With dead ends: 2723 [2021-08-06 18:33:47,188 INFO L226 Difference]: Without dead ends: 2643 [2021-08-06 18:33:47,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 18:33:47,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-08-06 18:33:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 1422. [2021-08-06 18:33:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1411 states have (on average 1.2870304748405386) internal successors, (1816), 1421 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 18:33:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1816 transitions. [2021-08-06 18:33:47,203 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1816 transitions. Word has length 62 [2021-08-06 18:33:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:47,204 INFO L470 AbstractCegarLoop]: Abstraction has 1422 states and 1816 transitions. [2021-08-06 18:33:47,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1816 transitions. [2021-08-06 18:33:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:47,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:47,205 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-08-06 18:33:47,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:47,424 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,SelfDestructingSolverStorable38 [2021-08-06 18:33:47,425 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1539089290, now seen corresponding path program 4 times [2021-08-06 18:33:47,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:47,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200497764] [2021-08-06 18:33:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:47,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:47,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:47,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:47,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:47,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:47,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:47,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:47,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:47,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200497764] [2021-08-06 18:33:47,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200497764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:47,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867622821] [2021-08-06 18:33:47,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:33:47,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:47,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:47,542 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 18:33:47,543 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 18:33:48,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:33:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:49,115 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:49,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:49,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:49,550 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:49,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867622821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:49,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:49,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:49,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578462899] [2021-08-06 18:33:49,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:49,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:49,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:49,555 INFO L87 Difference]: Start difference. First operand 1422 states and 1816 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:49,914 INFO L93 Difference]: Finished difference Result 2673 states and 3345 transitions. [2021-08-06 18:33:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:33:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:49,917 INFO L225 Difference]: With dead ends: 2673 [2021-08-06 18:33:49,917 INFO L226 Difference]: Without dead ends: 2473 [2021-08-06 18:33:49,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 18:33:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-08-06 18:33:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1464. [2021-08-06 18:33:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1453 states have (on average 1.284239504473503) internal successors, (1866), 1463 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states 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 18:33:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1866 transitions. [2021-08-06 18:33:49,930 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1866 transitions. Word has length 62 [2021-08-06 18:33:49,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:49,931 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 1866 transitions. [2021-08-06 18:33:49,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1866 transitions. [2021-08-06 18:33:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:49,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:49,932 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:33:49,952 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 18:33:50,133 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,SelfDestructingSolverStorable39 [2021-08-06 18:33:50,133 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1173456386, now seen corresponding path program 17 times [2021-08-06 18:33:50,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:50,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580460998] [2021-08-06 18:33:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:50,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:50,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:50,166 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:50,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:50,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:50,241 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:50,242 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:50,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:50,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580460998] [2021-08-06 18:33:50,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580460998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:50,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863498643] [2021-08-06 18:33:50,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:33:50,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:50,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:50,264 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 18:33:50,264 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 18:33:51,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:33:51,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:51,844 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:51,845 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:52,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:52,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:52,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863498643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:52,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:52,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:52,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392115952] [2021-08-06 18:33:52,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:52,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:52,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:52,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:52,284 INFO L87 Difference]: Start difference. First operand 1464 states and 1866 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:52,647 INFO L93 Difference]: Finished difference Result 2731 states and 3405 transitions. [2021-08-06 18:33:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:33:52,648 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:52,650 INFO L225 Difference]: With dead ends: 2731 [2021-08-06 18:33:52,651 INFO L226 Difference]: Without dead ends: 2651 [2021-08-06 18:33:52,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 392.9ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:33:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-08-06 18:33:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 1439. [2021-08-06 18:33:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1428 states have (on average 1.285014005602241) internal successors, (1835), 1438 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states 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 18:33:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1835 transitions. [2021-08-06 18:33:52,676 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1835 transitions. Word has length 62 [2021-08-06 18:33:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:52,676 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1835 transitions. [2021-08-06 18:33:52,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1835 transitions. [2021-08-06 18:33:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:52,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:52,678 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:33:52,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:52,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:52,897 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:52,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2059698922, now seen corresponding path program 18 times [2021-08-06 18:33:52,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:52,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733693056] [2021-08-06 18:33:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:52,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:52,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:52,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:52,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:52,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:52,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:52,986 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:53,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:53,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733693056] [2021-08-06 18:33:53,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733693056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:53,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364876533] [2021-08-06 18:33:53,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:33:53,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:53,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:53,006 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 18:33:53,020 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 18:33:54,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:33:54,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:54,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:54,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:54,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:55,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:55,072 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:55,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364876533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:55,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:55,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:55,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049062645] [2021-08-06 18:33:55,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:55,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:55,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:55,077 INFO L87 Difference]: Start difference. First operand 1439 states and 1835 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:55,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:55,325 INFO L93 Difference]: Finished difference Result 2422 states and 3026 transitions. [2021-08-06 18:33:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:33:55,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:55,328 INFO L225 Difference]: With dead ends: 2422 [2021-08-06 18:33:55,328 INFO L226 Difference]: Without dead ends: 2342 [2021-08-06 18:33:55,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 18:33:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-08-06 18:33:55,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1429. [2021-08-06 18:33:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1418 states have (on average 1.278561354019746) internal successors, (1813), 1428 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states 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 18:33:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1813 transitions. [2021-08-06 18:33:55,340 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1813 transitions. Word has length 62 [2021-08-06 18:33:55,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:55,340 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 1813 transitions. [2021-08-06 18:33:55,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1813 transitions. [2021-08-06 18:33:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:55,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:55,342 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-08-06 18:33:55,362 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 18:33:55,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:55,546 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:55,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:55,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1047988005, now seen corresponding path program 3 times [2021-08-06 18:33:55,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:55,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850547324] [2021-08-06 18:33:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:55,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:55,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:55,586 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:55,591 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:55,592 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:55,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:55,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:55,606 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:55,607 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:55,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:55,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:55,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:55,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:55,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:33:55,634 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:33:55,645 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:55,646 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:55,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:55,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850547324] [2021-08-06 18:33:55,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850547324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:55,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355778311] [2021-08-06 18:33:55,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:55,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:55,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:55,667 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 18:33:55,668 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 18:33:57,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 18:33:57,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:57,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:57,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:57,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:57,748 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:57,749 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:57,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355778311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:57,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:57,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:33:57,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396056114] [2021-08-06 18:33:57,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:33:57,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:33:57,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:57,753 INFO L87 Difference]: Start difference. First operand 1429 states and 1813 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:57,966 INFO L93 Difference]: Finished difference Result 2299 states and 2860 transitions. [2021-08-06 18:33:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:33:57,967 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:33:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:57,969 INFO L225 Difference]: With dead ends: 2299 [2021-08-06 18:33:57,969 INFO L226 Difference]: Without dead ends: 2139 [2021-08-06 18:33:57,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 18:33:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-08-06 18:33:57,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1439. [2021-08-06 18:33:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1428 states have (on average 1.285014005602241) internal successors, (1835), 1438 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states 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 18:33:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1835 transitions. [2021-08-06 18:33:57,981 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1835 transitions. Word has length 62 [2021-08-06 18:33:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:57,981 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1835 transitions. [2021-08-06 18:33:57,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:33:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1835 transitions. [2021-08-06 18:33:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:57,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:57,983 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-08-06 18:33:58,010 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 18:33:58,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:58,197 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:58,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1227741992, now seen corresponding path program 11 times [2021-08-06 18:33:58,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:58,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841119737] [2021-08-06 18:33:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:58,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:58,261 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:58,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:58,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:58,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:58,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:58,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:58,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:58,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841119737] [2021-08-06 18:33:58,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841119737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:58,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40830215] [2021-08-06 18:33:58,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:33:58,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:58,307 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 18:33:58,328 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 18:33:59,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:33:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:00,461 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:00,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:00,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40830215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:00,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:00,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:00,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541666321] [2021-08-06 18:34:00,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:00,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:00,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:00,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:00,466 INFO L87 Difference]: Start difference. First operand 1439 states and 1835 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:00,643 INFO L93 Difference]: Finished difference Result 2472 states and 3080 transitions. [2021-08-06 18:34:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:34:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:34:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:00,646 INFO L225 Difference]: With dead ends: 2472 [2021-08-06 18:34:00,646 INFO L226 Difference]: Without dead ends: 2392 [2021-08-06 18:34:00,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:34:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-08-06 18:34:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 1449. [2021-08-06 18:34:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1438 states have (on average 1.2913769123783032) internal successors, (1857), 1448 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states 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 18:34:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1857 transitions. [2021-08-06 18:34:00,660 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1857 transitions. Word has length 62 [2021-08-06 18:34:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:00,660 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 1857 transitions. [2021-08-06 18:34:00,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1857 transitions. [2021-08-06 18:34:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:00,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:00,661 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-08-06 18:34:00,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 18:34:00,862 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,SelfDestructingSolverStorable43 [2021-08-06 18:34:00,862 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:00,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:00,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1775222718, now seen corresponding path program 12 times [2021-08-06 18:34:00,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:00,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696882631] [2021-08-06 18:34:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:00,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:00,929 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:00,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:00,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:00,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:00,965 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:00,966 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:00,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:00,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696882631] [2021-08-06 18:34:00,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696882631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:00,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740897898] [2021-08-06 18:34:00,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:34:00,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:00,988 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 18:34:00,988 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 18:34:02,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:34:02,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:02,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:34:02,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:03,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:34:03,002 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:34:03,018 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:03,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:03,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:03,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:03,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740897898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:03,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:03,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-06 18:34:03,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919024839] [2021-08-06 18:34:03,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:34:03,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:34:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:34:03,032 INFO L87 Difference]: Start difference. First operand 1449 states and 1857 transitions. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 18:34:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:03,366 INFO L93 Difference]: Finished difference Result 3325 states and 4203 transitions. [2021-08-06 18:34:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:34:03,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:03,369 INFO L225 Difference]: With dead ends: 3325 [2021-08-06 18:34:03,369 INFO L226 Difference]: Without dead ends: 3085 [2021-08-06 18:34:03,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 18:34:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2021-08-06 18:34:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 1420. [2021-08-06 18:34:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1409 states have (on average 1.2902767920511) internal successors, (1818), 1419 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states 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 18:34:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1818 transitions. [2021-08-06 18:34:03,385 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1818 transitions. Word has length 62 [2021-08-06 18:34:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:03,385 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 1818 transitions. [2021-08-06 18:34:03,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 18:34:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1818 transitions. [2021-08-06 18:34:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:03,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:03,386 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:34:03,406 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 18:34:03,586 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,SelfDestructingSolverStorable44 [2021-08-06 18:34:03,587 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1774761550, now seen corresponding path program 19 times [2021-08-06 18:34:03,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:03,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631821556] [2021-08-06 18:34:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:03,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:03,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:03,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:03,659 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:34:03,660 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:34:03,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:03,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:03,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:03,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631821556] [2021-08-06 18:34:03,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631821556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:03,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425182331] [2021-08-06 18:34:03,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:34:03,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:03,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:03,690 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 18:34:03,714 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 18:34:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:05,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:05,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:05,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:05,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:05,866 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:05,867 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:05,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425182331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:05,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:05,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:34:05,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76440773] [2021-08-06 18:34:05,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:34:05,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:05,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:34:05,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:34:05,871 INFO L87 Difference]: Start difference. First operand 1420 states and 1818 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:34:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:06,507 INFO L93 Difference]: Finished difference Result 3055 states and 3857 transitions. [2021-08-06 18:34:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 18:34:06,508 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:06,510 INFO L225 Difference]: With dead ends: 3055 [2021-08-06 18:34:06,510 INFO L226 Difference]: Without dead ends: 2895 [2021-08-06 18:34:06,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 637.0ms TimeCoverageRelationStatistics Valid=511, Invalid=1651, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 18:34:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-08-06 18:34:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 1501. [2021-08-06 18:34:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1490 states have (on average 1.2919463087248322) internal successors, (1925), 1500 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states 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 18:34:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 1925 transitions. [2021-08-06 18:34:06,525 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 1925 transitions. Word has length 62 [2021-08-06 18:34:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:06,525 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 1925 transitions. [2021-08-06 18:34:06,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:34:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 1925 transitions. [2021-08-06 18:34:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:06,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:06,527 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:34:06,549 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 18:34:06,740 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,SelfDestructingSolverStorable45 [2021-08-06 18:34:06,741 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2024950388, now seen corresponding path program 20 times [2021-08-06 18:34:06,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:06,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265424895] [2021-08-06 18:34:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:06,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:06,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:06,812 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:06,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:06,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:06,834 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:06,835 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:06,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:06,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265424895] [2021-08-06 18:34:06,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265424895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:06,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757820904] [2021-08-06 18:34:06,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:34:06,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:06,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:06,857 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 18:34:06,858 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 18:34:08,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:34:08,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:08,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:09,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:09,226 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:09,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757820904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:09,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:09,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:09,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600978650] [2021-08-06 18:34:09,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:09,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:09,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:09,231 INFO L87 Difference]: Start difference. First operand 1501 states and 1925 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:10,086 INFO L93 Difference]: Finished difference Result 3585 states and 4527 transitions. [2021-08-06 18:34:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 18:34:10,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:34:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:10,089 INFO L225 Difference]: With dead ends: 3585 [2021-08-06 18:34:10,089 INFO L226 Difference]: Without dead ends: 3345 [2021-08-06 18:34:10,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 850.3ms TimeCoverageRelationStatistics Valid=720, Invalid=2702, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 18:34:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-08-06 18:34:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 1536. [2021-08-06 18:34:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1525 states have (on average 1.2891803278688525) internal successors, (1966), 1535 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states 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 18:34:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 1966 transitions. [2021-08-06 18:34:10,106 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 1966 transitions. Word has length 62 [2021-08-06 18:34:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:10,106 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 1966 transitions. [2021-08-06 18:34:10,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 1966 transitions. [2021-08-06 18:34:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:10,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:10,107 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 18:34:10,127 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 18:34:10,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 18:34:10,308 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:10,308 INFO L82 PathProgramCache]: Analyzing trace with hash 459599022, now seen corresponding path program 21 times [2021-08-06 18:34:10,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:10,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546998364] [2021-08-06 18:34:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:10,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:10,372 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:10,373 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:10,382 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:34:10,383 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:34:10,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:10,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:10,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:10,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546998364] [2021-08-06 18:34:10,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546998364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:10,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689414875] [2021-08-06 18:34:10,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:34:10,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:10,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:10,416 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 18:34:10,416 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 18:34:12,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:34:12,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:12,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:12,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:12,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:12,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:12,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:12,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:12,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689414875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:12,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:12,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:34:12,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618245383] [2021-08-06 18:34:12,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:34:12,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:34:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:34:12,666 INFO L87 Difference]: Start difference. First operand 1536 states and 1966 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:34:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:13,625 INFO L93 Difference]: Finished difference Result 3253 states and 4091 transitions. [2021-08-06 18:34:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 18:34:13,625 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:13,628 INFO L225 Difference]: With dead ends: 3253 [2021-08-06 18:34:13,628 INFO L226 Difference]: Without dead ends: 3093 [2021-08-06 18:34:13,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 914.9ms TimeCoverageRelationStatistics Valid=772, Invalid=2420, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 18:34:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-08-06 18:34:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 1558. [2021-08-06 18:34:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1547 states have (on average 1.2902391725921138) internal successors, (1996), 1557 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states 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 18:34:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 1996 transitions. [2021-08-06 18:34:13,645 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 1996 transitions. Word has length 62 [2021-08-06 18:34:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:13,645 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 1996 transitions. [2021-08-06 18:34:13,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 18:34:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 1996 transitions. [2021-08-06 18:34:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:13,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:13,646 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:34:13,669 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 18:34:13,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:13,853 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:13,853 INFO L82 PathProgramCache]: Analyzing trace with hash 743040378, now seen corresponding path program 22 times [2021-08-06 18:34:13,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:13,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566279178] [2021-08-06 18:34:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:13,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:13,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:13,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:13,929 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:13,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:13,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:13,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:13,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:13,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566279178] [2021-08-06 18:34:13,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566279178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:13,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29112078] [2021-08-06 18:34:13,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:34:13,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:13,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:13,963 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 18:34:13,967 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 18:34:15,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:34:15,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:15,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:16,372 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:16,372 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:16,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29112078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:16,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:16,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:16,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8032950] [2021-08-06 18:34:16,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:16,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:16,377 INFO L87 Difference]: Start difference. First operand 1558 states and 1996 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:17,402 INFO L93 Difference]: Finished difference Result 3524 states and 4484 transitions. [2021-08-06 18:34:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 18:34:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:34:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:17,405 INFO L225 Difference]: With dead ends: 3524 [2021-08-06 18:34:17,405 INFO L226 Difference]: Without dead ends: 3284 [2021-08-06 18:34:17,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 962.6ms TimeCoverageRelationStatistics Valid=831, Invalid=3075, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 18:34:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-08-06 18:34:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 1564. [2021-08-06 18:34:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1553 states have (on average 1.286542176432711) internal successors, (1998), 1563 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states 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 18:34:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 1998 transitions. [2021-08-06 18:34:17,420 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 1998 transitions. Word has length 62 [2021-08-06 18:34:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:17,420 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 1998 transitions. [2021-08-06 18:34:17,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 1998 transitions. [2021-08-06 18:34:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:17,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:17,422 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:34:17,445 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 18:34:17,622 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,SelfDestructingSolverStorable48 [2021-08-06 18:34:17,622 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:17,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:17,623 INFO L82 PathProgramCache]: Analyzing trace with hash 903538034, now seen corresponding path program 23 times [2021-08-06 18:34:17,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:17,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089828403] [2021-08-06 18:34:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:17,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:17,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:17,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:17,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:34:17,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:34:17,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:17,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:17,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:17,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089828403] [2021-08-06 18:34:17,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089828403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:17,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619281211] [2021-08-06 18:34:17,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:34:17,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:17,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:17,746 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 18:34:17,746 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 18:34:19,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:34:19,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:19,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:20,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:20,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619281211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:20,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:20,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:20,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582811223] [2021-08-06 18:34:20,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:20,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:20,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:20,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:20,163 INFO L87 Difference]: Start difference. First operand 1564 states and 1998 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:20,558 INFO L93 Difference]: Finished difference Result 2890 states and 3634 transitions. [2021-08-06 18:34:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 18:34:20,559 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:34:20,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:20,561 INFO L225 Difference]: With dead ends: 2890 [2021-08-06 18:34:20,561 INFO L226 Difference]: Without dead ends: 2810 [2021-08-06 18:34:20,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 18:34:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-08-06 18:34:20,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1539. [2021-08-06 18:34:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1528 states have (on average 1.287303664921466) internal successors, (1967), 1538 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states 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 18:34:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1967 transitions. [2021-08-06 18:34:20,577 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1967 transitions. Word has length 62 [2021-08-06 18:34:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:20,577 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 1967 transitions. [2021-08-06 18:34:20,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1967 transitions. [2021-08-06 18:34:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:20,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:20,578 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:34:20,601 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 18:34:20,792 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,SelfDestructingSolverStorable49 [2021-08-06 18:34:20,793 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -149508316, now seen corresponding path program 24 times [2021-08-06 18:34:20,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:20,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518526590] [2021-08-06 18:34:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:20,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:20,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:20,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:20,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:20,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:20,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:20,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:20,860 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:20,861 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:20,871 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:20,872 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:20,882 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:20,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:20,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:20,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518526590] [2021-08-06 18:34:20,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518526590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:20,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248139947] [2021-08-06 18:34:20,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:34:20,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:20,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:20,905 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 18:34:20,906 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 18:34:22,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:34:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:22,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:22,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:23,329 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:23,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:23,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248139947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:23,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:23,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:23,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782187731] [2021-08-06 18:34:23,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:23,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:23,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:23,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:23,335 INFO L87 Difference]: Start difference. First operand 1539 states and 1967 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:24,373 INFO L93 Difference]: Finished difference Result 3899 states and 4885 transitions. [2021-08-06 18:34:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 18:34:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:34:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:24,376 INFO L225 Difference]: With dead ends: 3899 [2021-08-06 18:34:24,376 INFO L226 Difference]: Without dead ends: 3659 [2021-08-06 18:34:24,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 974.7ms TimeCoverageRelationStatistics Valid=984, Invalid=3708, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 18:34:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3659 states. [2021-08-06 18:34:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3659 to 1514. [2021-08-06 18:34:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1503 states have (on average 1.2827677977378575) internal successors, (1928), 1513 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 18:34:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1928 transitions. [2021-08-06 18:34:24,394 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1928 transitions. Word has length 62 [2021-08-06 18:34:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:24,394 INFO L470 AbstractCegarLoop]: Abstraction has 1514 states and 1928 transitions. [2021-08-06 18:34:24,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1928 transitions. [2021-08-06 18:34:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:24,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:24,395 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:34:24,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 18:34:24,612 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,SelfDestructingSolverStorable50 [2021-08-06 18:34:24,613 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1990332302, now seen corresponding path program 25 times [2021-08-06 18:34:24,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:24,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999163818] [2021-08-06 18:34:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:24,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:24,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:24,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:24,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:24,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:24,689 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:24,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:24,699 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:24,700 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:24,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:24,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999163818] [2021-08-06 18:34:24,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999163818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:24,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988978126] [2021-08-06 18:34:24,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:34:24,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:24,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:24,720 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 18:34:24,745 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 18:34:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:26,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:27,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:27,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:27,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988978126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:27,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:27,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:27,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401588343] [2021-08-06 18:34:27,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:27,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:27,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:27,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:27,228 INFO L87 Difference]: Start difference. First operand 1514 states and 1928 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:28,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:28,552 INFO L93 Difference]: Finished difference Result 4455 states and 5611 transitions. [2021-08-06 18:34:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 18:34:28,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:34:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:28,557 INFO L225 Difference]: With dead ends: 4455 [2021-08-06 18:34:28,557 INFO L226 Difference]: Without dead ends: 4215 [2021-08-06 18:34:28,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 1230.7ms TimeCoverageRelationStatistics Valid=1335, Invalid=4671, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 18:34:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2021-08-06 18:34:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 1532. [2021-08-06 18:34:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1521 states have (on average 1.287310979618672) internal successors, (1958), 1531 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states 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 18:34:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 1958 transitions. [2021-08-06 18:34:28,575 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 1958 transitions. Word has length 62 [2021-08-06 18:34:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:28,575 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 1958 transitions. [2021-08-06 18:34:28,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:28,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 1958 transitions. [2021-08-06 18:34:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:28,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:28,577 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 18:34:28,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 18:34:28,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:28,777 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash 341915200, now seen corresponding path program 26 times [2021-08-06 18:34:28,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:28,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190773405] [2021-08-06 18:34:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:28,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:28,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:28,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:28,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:28,858 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:28,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:28,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:28,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:28,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190773405] [2021-08-06 18:34:28,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190773405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:28,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556522287] [2021-08-06 18:34:28,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:34:28,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:28,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:28,891 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 18:34:28,891 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 18:34:30,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:34:30,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:30,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:30,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:31,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:34:31,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:34:31,320 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:31,321 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:31,329 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:31,329 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:31,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556522287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:31,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:31,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:31,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224592576] [2021-08-06 18:34:31,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:31,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:31,334 INFO L87 Difference]: Start difference. First operand 1532 states and 1958 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:32,432 INFO L93 Difference]: Finished difference Result 4176 states and 5272 transitions. [2021-08-06 18:34:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 18:34:32,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:34:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:32,436 INFO L225 Difference]: With dead ends: 4176 [2021-08-06 18:34:32,436 INFO L226 Difference]: Without dead ends: 3936 [2021-08-06 18:34:32,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 996.4ms TimeCoverageRelationStatistics Valid=1206, Invalid=4344, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 18:34:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-08-06 18:34:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 1657. [2021-08-06 18:34:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1646 states have (on average 1.2910085054678007) internal successors, (2125), 1656 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states 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 18:34:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2125 transitions. [2021-08-06 18:34:32,455 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2125 transitions. Word has length 62 [2021-08-06 18:34:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:32,455 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 2125 transitions. [2021-08-06 18:34:32,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2125 transitions. [2021-08-06 18:34:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:32,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:32,456 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 18:34:32,478 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 18:34:32,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:32,658 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:32,658 INFO L82 PathProgramCache]: Analyzing trace with hash 206731566, now seen corresponding path program 27 times [2021-08-06 18:34:32,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:32,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198869668] [2021-08-06 18:34:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:32,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:32,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:32,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:32,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:32,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:32,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:32,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:32,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:32,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198869668] [2021-08-06 18:34:32,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198869668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:32,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219941625] [2021-08-06 18:34:32,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:34:32,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:32,769 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 18:34:32,769 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 18:34:34,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:34:34,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:34,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:34,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:35,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:35,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:35,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219941625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:35,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:35,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:35,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625201477] [2021-08-06 18:34:35,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:35,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:35,291 INFO L87 Difference]: Start difference. First operand 1657 states and 2125 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:36,230 INFO L93 Difference]: Finished difference Result 4177 states and 5295 transitions. [2021-08-06 18:34:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 18:34:36,230 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:34:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:36,234 INFO L225 Difference]: With dead ends: 4177 [2021-08-06 18:34:36,234 INFO L226 Difference]: Without dead ends: 3937 [2021-08-06 18:34:36,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 870.4ms TimeCoverageRelationStatistics Valid=913, Invalid=3247, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 18:34:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2021-08-06 18:34:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 1647. [2021-08-06 18:34:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1636 states have (on average 1.300122249388753) internal successors, (2127), 1646 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states 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 18:34:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2127 transitions. [2021-08-06 18:34:36,252 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2127 transitions. Word has length 62 [2021-08-06 18:34:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:36,252 INFO L470 AbstractCegarLoop]: Abstraction has 1647 states and 2127 transitions. [2021-08-06 18:34:36,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2127 transitions. [2021-08-06 18:34:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:36,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:36,254 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-08-06 18:34:36,276 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 18:34:36,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:36,454 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:36,454 INFO L82 PathProgramCache]: Analyzing trace with hash -69832134, now seen corresponding path program 28 times [2021-08-06 18:34:36,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:36,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573300660] [2021-08-06 18:34:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:36,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:36,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:36,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:36,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:36,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:36,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:36,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:36,545 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:36,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:36,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:36,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:36,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:36,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573300660] [2021-08-06 18:34:36,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573300660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:36,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996799946] [2021-08-06 18:34:36,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:34:36,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:36,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:36,577 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 18:34:36,578 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 18:34:38,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:34:38,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:38,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:38,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:39,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:39,224 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:39,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996799946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:39,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:39,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:39,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215773407] [2021-08-06 18:34:39,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:39,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:39,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:39,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:39,229 INFO L87 Difference]: Start difference. First operand 1647 states and 2127 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:40,322 INFO L93 Difference]: Finished difference Result 4484 states and 5640 transitions. [2021-08-06 18:34:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 18:34:40,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 62 [2021-08-06 18:34:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:40,327 INFO L225 Difference]: With dead ends: 4484 [2021-08-06 18:34:40,327 INFO L226 Difference]: Without dead ends: 4244 [2021-08-06 18:34:40,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 1024.0ms TimeCoverageRelationStatistics Valid=1076, Invalid=4180, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 18:34:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2021-08-06 18:34:40,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 1599. [2021-08-06 18:34:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1588 states have (on average 1.294080604534005) internal successors, (2055), 1598 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states 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 18:34:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 2055 transitions. [2021-08-06 18:34:40,347 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 2055 transitions. Word has length 62 [2021-08-06 18:34:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:40,347 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 2055 transitions. [2021-08-06 18:34:40,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 18:34:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 2055 transitions. [2021-08-06 18:34:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:34:40,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:40,349 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-08-06 18:34:40,370 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 18:34:40,549 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,SelfDestructingSolverStorable54 [2021-08-06 18:34:40,549 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash -122495793, now seen corresponding path program 13 times [2021-08-06 18:34:40,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:40,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428521368] [2021-08-06 18:34:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:40,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:40,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:40,584 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:40,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:40,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:40,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:40,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428521368] [2021-08-06 18:34:40,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428521368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:40,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211807714] [2021-08-06 18:34:40,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:34:40,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:40,691 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 18:34:40,692 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 18:34:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:42,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:34:42,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:42,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:42,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:43,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:43,390 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:43,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:43,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:43,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211807714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:43,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:43,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 18:34:43,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750026383] [2021-08-06 18:34:43,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 18:34:43,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:43,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 18:34:43,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-06 18:34:43,403 INFO L87 Difference]: Start difference. First operand 1599 states and 2055 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:43,496 INFO L93 Difference]: Finished difference Result 2470 states and 3146 transitions. [2021-08-06 18:34:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:34:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:34:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:43,498 INFO L225 Difference]: With dead ends: 2470 [2021-08-06 18:34:43,498 INFO L226 Difference]: Without dead ends: 2390 [2021-08-06 18:34:43,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:34:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-08-06 18:34:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1648. [2021-08-06 18:34:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1637 states have (on average 1.308491142333537) internal successors, (2142), 1647 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states 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 18:34:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2142 transitions. [2021-08-06 18:34:43,512 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2142 transitions. Word has length 67 [2021-08-06 18:34:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:43,512 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 2142 transitions. [2021-08-06 18:34:43,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2142 transitions. [2021-08-06 18:34:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:34:43,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:43,513 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:34:43,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 18:34:43,714 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,SelfDestructingSolverStorable55 [2021-08-06 18:34:43,714 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:43,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1499913383, now seen corresponding path program 29 times [2021-08-06 18:34:43,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:43,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919765644] [2021-08-06 18:34:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:43,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:43,748 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:43,749 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:43,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:43,827 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:43,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:43,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919765644] [2021-08-06 18:34:43,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919765644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:43,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113185576] [2021-08-06 18:34:43,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:34:43,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:43,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:43,852 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 18:34:43,852 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 18:34:45,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:34:45,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:34:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:46,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:46,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:46,700 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:46,701 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:46,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113185576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:46,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:46,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:34:46,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163925844] [2021-08-06 18:34:46,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:34:46,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:34:46,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:34:46,705 INFO L87 Difference]: Start difference. First operand 1648 states and 2142 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:47,030 INFO L93 Difference]: Finished difference Result 2934 states and 3722 transitions. [2021-08-06 18:34:47,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:34:47,031 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:34:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:47,034 INFO L225 Difference]: With dead ends: 2934 [2021-08-06 18:34:47,034 INFO L226 Difference]: Without dead ends: 2854 [2021-08-06 18:34:47,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=334, Invalid=998, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:34:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-08-06 18:34:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1658. [2021-08-06 18:34:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1647 states have (on average 1.3066180935033394) internal successors, (2152), 1657 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states 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 18:34:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2152 transitions. [2021-08-06 18:34:47,050 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2152 transitions. Word has length 67 [2021-08-06 18:34:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:47,050 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 2152 transitions. [2021-08-06 18:34:47,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2152 transitions. [2021-08-06 18:34:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:34:47,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:47,052 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:34:47,074 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 18:34:47,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-06 18:34:47,253 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash -873647907, now seen corresponding path program 30 times [2021-08-06 18:34:47,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:47,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287359235] [2021-08-06 18:34:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:47,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:47,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:47,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:47,363 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:47,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:47,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:47,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287359235] [2021-08-06 18:34:47,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287359235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:47,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434712262] [2021-08-06 18:34:47,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:34:47,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:47,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:47,387 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 18:34:47,416 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 18:34:49,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:34:49,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:49,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:34:49,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:49,809 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:49,810 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:52,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:52,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:52,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434712262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:52,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:52,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:34:52,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28366906] [2021-08-06 18:34:52,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:34:52,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:52,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:34:52,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=374, Unknown=1, NotChecked=0, Total=506 [2021-08-06 18:34:52,861 INFO L87 Difference]: Start difference. First operand 1658 states and 2152 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:02,060 INFO L93 Difference]: Finished difference Result 3336 states and 4232 transitions. [2021-08-06 18:35:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:35:02,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:02,069 INFO L225 Difference]: With dead ends: 3336 [2021-08-06 18:35:02,069 INFO L226 Difference]: Without dead ends: 3216 [2021-08-06 18:35:02,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 7195.2ms TimeCoverageRelationStatistics Valid=403, Invalid=1236, Unknown=1, NotChecked=0, Total=1640 [2021-08-06 18:35:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2021-08-06 18:35:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 1692. [2021-08-06 18:35:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1681 states have (on average 1.305175490779298) internal successors, (2194), 1691 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states 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 18:35:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2194 transitions. [2021-08-06 18:35:02,088 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2194 transitions. Word has length 67 [2021-08-06 18:35:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:02,088 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2194 transitions. [2021-08-06 18:35:02,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2194 transitions. [2021-08-06 18:35:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:02,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:02,090 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:35:02,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 18:35:02,300 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,SelfDestructingSolverStorable57 [2021-08-06 18:35:02,301 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash -346491431, now seen corresponding path program 31 times [2021-08-06 18:35:02,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:02,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061601886] [2021-08-06 18:35:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:02,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:02,338 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:02,339 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:02,415 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:02,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:02,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:02,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061601886] [2021-08-06 18:35:02,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061601886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:02,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913645808] [2021-08-06 18:35:02,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:35:02,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:02,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:02,441 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 18:35:02,442 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 18:35:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:04,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:04,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:04,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:04,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:05,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:05,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:05,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913645808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:05,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:05,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:05,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266531622] [2021-08-06 18:35:05,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:05,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:05,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:05,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:05,470 INFO L87 Difference]: Start difference. First operand 1692 states and 2194 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:06,060 INFO L93 Difference]: Finished difference Result 3193 states and 4047 transitions. [2021-08-06 18:35:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 18:35:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:06,063 INFO L225 Difference]: With dead ends: 3193 [2021-08-06 18:35:06,063 INFO L226 Difference]: Without dead ends: 3113 [2021-08-06 18:35:06,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 630.5ms TimeCoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:35:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2021-08-06 18:35:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 1742. [2021-08-06 18:35:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1731 states have (on average 1.3032928942807627) internal successors, (2256), 1741 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states 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 18:35:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 2256 transitions. [2021-08-06 18:35:06,080 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 2256 transitions. Word has length 67 [2021-08-06 18:35:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:06,080 INFO L470 AbstractCegarLoop]: Abstraction has 1742 states and 2256 transitions. [2021-08-06 18:35:06,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 2256 transitions. [2021-08-06 18:35:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:06,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:06,082 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:35:06,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 18:35:06,283 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,SelfDestructingSolverStorable58 [2021-08-06 18:35:06,283 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:06,284 INFO L82 PathProgramCache]: Analyzing trace with hash 587318683, now seen corresponding path program 32 times [2021-08-06 18:35:06,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:06,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844687612] [2021-08-06 18:35:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:06,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:06,338 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:06,339 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:06,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:06,411 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:06,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:06,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844687612] [2021-08-06 18:35:06,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844687612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:06,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050866479] [2021-08-06 18:35:06,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:35:06,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:06,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:06,436 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 18:35:06,460 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 18:35:08,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:35:08,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:08,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:08,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:08,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:08,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:09,538 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:09,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:09,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050866479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:09,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:09,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:09,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354150342] [2021-08-06 18:35:09,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:09,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:09,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:09,543 INFO L87 Difference]: Start difference. First operand 1742 states and 2256 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:10,097 INFO L93 Difference]: Finished difference Result 3218 states and 4070 transitions. [2021-08-06 18:35:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:35:10,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:10,100 INFO L225 Difference]: With dead ends: 3218 [2021-08-06 18:35:10,100 INFO L226 Difference]: Without dead ends: 3138 [2021-08-06 18:35:10,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:35:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2021-08-06 18:35:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1727. [2021-08-06 18:35:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1716 states have (on average 1.3024475524475525) internal successors, (2235), 1726 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states 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 18:35:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2235 transitions. [2021-08-06 18:35:10,118 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2235 transitions. Word has length 67 [2021-08-06 18:35:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:10,118 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 2235 transitions. [2021-08-06 18:35:10,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2235 transitions. [2021-08-06 18:35:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:10,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:10,120 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:35:10,143 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 18:35:10,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 18:35:10,320 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash 246910477, now seen corresponding path program 33 times [2021-08-06 18:35:10,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:10,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852107444] [2021-08-06 18:35:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:10,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:10,364 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:10,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:10,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:10,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:10,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:10,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852107444] [2021-08-06 18:35:10,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852107444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:10,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048038425] [2021-08-06 18:35:10,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:35:10,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:10,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:10,473 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 18:35:10,474 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 18:35:12,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:35:12,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:12,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:12,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:13,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:13,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:13,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:13,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:13,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048038425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:13,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:13,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:13,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135670925] [2021-08-06 18:35:13,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:13,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:13,609 INFO L87 Difference]: Start difference. First operand 1727 states and 2235 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:14,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:14,161 INFO L93 Difference]: Finished difference Result 3153 states and 3983 transitions. [2021-08-06 18:35:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 18:35:14,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:14,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:14,164 INFO L225 Difference]: With dead ends: 3153 [2021-08-06 18:35:14,164 INFO L226 Difference]: Without dead ends: 3073 [2021-08-06 18:35:14,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=496, Invalid=1396, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:35:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2021-08-06 18:35:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 1727. [2021-08-06 18:35:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1716 states have (on average 1.3024475524475525) internal successors, (2235), 1726 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states 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 18:35:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2235 transitions. [2021-08-06 18:35:14,181 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2235 transitions. Word has length 67 [2021-08-06 18:35:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:14,181 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 2235 transitions. [2021-08-06 18:35:14,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2235 transitions. [2021-08-06 18:35:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:14,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:14,183 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:35:14,207 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 18:35:14,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:14,389 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash -626200995, now seen corresponding path program 34 times [2021-08-06 18:35:14,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:14,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370315742] [2021-08-06 18:35:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:14,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:14,423 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:14,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:14,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:14,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:14,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:14,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370315742] [2021-08-06 18:35:14,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370315742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:14,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637332196] [2021-08-06 18:35:14,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:35:14,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:14,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:14,520 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 18:35:14,521 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 18:35:16,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:35:16,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:16,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:16,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:17,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:17,110 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:17,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:17,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:17,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637332196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:17,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:17,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:17,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68928668] [2021-08-06 18:35:17,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:17,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:17,627 INFO L87 Difference]: Start difference. First operand 1727 states and 2235 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:18,235 INFO L93 Difference]: Finished difference Result 3443 states and 4336 transitions. [2021-08-06 18:35:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 18:35:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:18,239 INFO L225 Difference]: With dead ends: 3443 [2021-08-06 18:35:18,239 INFO L226 Difference]: Without dead ends: 3243 [2021-08-06 18:35:18,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 619.0ms TimeCoverageRelationStatistics Valid=575, Invalid=1777, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 18:35:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-08-06 18:35:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 1841. [2021-08-06 18:35:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1830 states have (on average 1.2956284153005464) internal successors, (2371), 1840 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states 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 18:35:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2371 transitions. [2021-08-06 18:35:18,267 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2371 transitions. Word has length 67 [2021-08-06 18:35:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:18,267 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2371 transitions. [2021-08-06 18:35:18,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2371 transitions. [2021-08-06 18:35:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:18,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:18,269 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:35:18,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 18:35:18,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:18,469 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:18,470 INFO L82 PathProgramCache]: Analyzing trace with hash 307609119, now seen corresponding path program 35 times [2021-08-06 18:35:18,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:18,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409498536] [2021-08-06 18:35:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:18,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:18,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:18,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:18,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:18,578 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:18,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:18,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409498536] [2021-08-06 18:35:18,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409498536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:18,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469426349] [2021-08-06 18:35:18,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:35:18,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:18,604 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 18:35:18,604 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 18:35:21,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:35:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:21,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:21,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:21,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:21,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:21,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:21,907 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:21,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469426349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:21,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:21,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:21,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535181961] [2021-08-06 18:35:21,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:21,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:21,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:21,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:21,912 INFO L87 Difference]: Start difference. First operand 1841 states and 2371 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:22,533 INFO L93 Difference]: Finished difference Result 3434 states and 4311 transitions. [2021-08-06 18:35:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:35:22,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:22,537 INFO L225 Difference]: With dead ends: 3434 [2021-08-06 18:35:22,537 INFO L226 Difference]: Without dead ends: 3354 [2021-08-06 18:35:22,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 670.0ms TimeCoverageRelationStatistics Valid=525, Invalid=1455, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 18:35:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-08-06 18:35:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 1816. [2021-08-06 18:35:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1805 states have (on average 1.296398891966759) internal successors, (2340), 1815 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 18:35:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2340 transitions. [2021-08-06 18:35:22,554 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2340 transitions. Word has length 67 [2021-08-06 18:35:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:22,554 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 2340 transitions. [2021-08-06 18:35:22,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:22,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2340 transitions. [2021-08-06 18:35:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:22,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:22,556 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:35:22,579 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 18:35:22,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:22,756 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:22,756 INFO L82 PathProgramCache]: Analyzing trace with hash -32799087, now seen corresponding path program 36 times [2021-08-06 18:35:22,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:22,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935342558] [2021-08-06 18:35:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:22,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:22,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:22,793 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:22,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:22,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:22,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:22,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935342558] [2021-08-06 18:35:22,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935342558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:22,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231175474] [2021-08-06 18:35:22,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:35:22,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:22,897 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 18:35:22,898 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 18:35:25,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:35:25,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:25,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:25,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:25,613 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:25,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:26,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:26,208 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:26,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231175474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:26,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:26,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:26,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203493214] [2021-08-06 18:35:26,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:26,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:26,214 INFO L87 Difference]: Start difference. First operand 1816 states and 2340 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:26,865 INFO L93 Difference]: Finished difference Result 3519 states and 4418 transitions. [2021-08-06 18:35:26,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 18:35:26,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:26,869 INFO L225 Difference]: With dead ends: 3519 [2021-08-06 18:35:26,869 INFO L226 Difference]: Without dead ends: 3439 [2021-08-06 18:35:26,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 684.3ms TimeCoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:35:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3439 states. [2021-08-06 18:35:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3439 to 1881. [2021-08-06 18:35:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1870 states have (on average 1.3021390374331552) internal successors, (2435), 1880 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states 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 18:35:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2435 transitions. [2021-08-06 18:35:26,886 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2435 transitions. Word has length 67 [2021-08-06 18:35:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:26,886 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 2435 transitions. [2021-08-06 18:35:26,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2435 transitions. [2021-08-06 18:35:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:26,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:26,896 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:35:26,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 18:35:27,098 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,SelfDestructingSolverStorable63 [2021-08-06 18:35:27,099 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1953455831, now seen corresponding path program 37 times [2021-08-06 18:35:27,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:27,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253570714] [2021-08-06 18:35:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:27,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:27,159 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:27,160 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:27,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:27,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:27,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:27,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253570714] [2021-08-06 18:35:27,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253570714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:27,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841306112] [2021-08-06 18:35:27,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:35:27,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:27,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:27,262 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 18:35:27,263 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 18:35:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:29,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:29,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:30,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:30,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:30,644 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:30,645 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:30,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841306112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:30,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:30,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:30,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847535692] [2021-08-06 18:35:30,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:30,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:30,650 INFO L87 Difference]: Start difference. First operand 1881 states and 2435 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:31,301 INFO L93 Difference]: Finished difference Result 3367 states and 4242 transitions. [2021-08-06 18:35:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:35:31,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:31,305 INFO L225 Difference]: With dead ends: 3367 [2021-08-06 18:35:31,305 INFO L226 Difference]: Without dead ends: 3287 [2021-08-06 18:35:31,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 702.0ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 18:35:31,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2021-08-06 18:35:31,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 1861. [2021-08-06 18:35:31,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1850 states have (on average 1.298918918918919) internal successors, (2403), 1860 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states 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 18:35:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2403 transitions. [2021-08-06 18:35:31,322 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2403 transitions. Word has length 67 [2021-08-06 18:35:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:31,323 INFO L470 AbstractCegarLoop]: Abstraction has 1861 states and 2403 transitions. [2021-08-06 18:35:31,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2403 transitions. [2021-08-06 18:35:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:31,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:31,324 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:35:31,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 18:35:31,525 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,SelfDestructingSolverStorable64 [2021-08-06 18:35:31,525 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:31,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1902378207, now seen corresponding path program 38 times [2021-08-06 18:35:31,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:31,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880218671] [2021-08-06 18:35:31,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:31,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:31,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:31,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:31,661 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:31,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:31,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:31,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880218671] [2021-08-06 18:35:31,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880218671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:31,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131762530] [2021-08-06 18:35:31,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:35:31,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:31,689 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 18:35:31,689 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 18:35:34,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:35:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:34,543 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:34,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:35,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:35,044 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:35,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131762530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:35,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:35,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:35,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977154754] [2021-08-06 18:35:35,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:35,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:35,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:35,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:35,049 INFO L87 Difference]: Start difference. First operand 1861 states and 2403 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:35,656 INFO L93 Difference]: Finished difference Result 3463 states and 4338 transitions. [2021-08-06 18:35:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 18:35:35,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:35,660 INFO L225 Difference]: With dead ends: 3463 [2021-08-06 18:35:35,660 INFO L226 Difference]: Without dead ends: 3383 [2021-08-06 18:35:35,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 673.2ms TimeCoverageRelationStatistics Valid=655, Invalid=1895, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 18:35:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-08-06 18:35:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1826. [2021-08-06 18:35:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1815 states have (on average 1.3013774104683196) internal successors, (2362), 1825 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states 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 18:35:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2362 transitions. [2021-08-06 18:35:35,678 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2362 transitions. Word has length 67 [2021-08-06 18:35:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:35,678 INFO L470 AbstractCegarLoop]: Abstraction has 1826 states and 2362 transitions. [2021-08-06 18:35:35,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2362 transitions. [2021-08-06 18:35:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:35,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:35,680 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:35:35,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 18:35:35,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:35,904 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:35,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1206199123, now seen corresponding path program 39 times [2021-08-06 18:35:35,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:35,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534084290] [2021-08-06 18:35:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:35,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:35,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:35,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:36,015 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:36,016 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:36,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:36,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534084290] [2021-08-06 18:35:36,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534084290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:36,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652634150] [2021-08-06 18:35:36,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:35:36,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:36,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:36,043 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 18:35:36,044 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 18:35:38,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:35:38,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:38,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:38,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:39,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:39,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:39,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652634150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:39,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:39,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:39,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587213231] [2021-08-06 18:35:39,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:39,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:39,506 INFO L87 Difference]: Start difference. First operand 1826 states and 2362 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:40,013 INFO L93 Difference]: Finished difference Result 3262 states and 4095 transitions. [2021-08-06 18:35:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:35:40,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:40,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:40,016 INFO L225 Difference]: With dead ends: 3262 [2021-08-06 18:35:40,016 INFO L226 Difference]: Without dead ends: 3182 [2021-08-06 18:35:40,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=491, Invalid=1401, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:35:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-08-06 18:35:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1831. [2021-08-06 18:35:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1820 states have (on average 1.3038461538461539) internal successors, (2373), 1830 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states 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 18:35:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2373 transitions. [2021-08-06 18:35:40,032 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2373 transitions. Word has length 67 [2021-08-06 18:35:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:40,032 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 2373 transitions. [2021-08-06 18:35:40,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2373 transitions. [2021-08-06 18:35:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:40,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:40,034 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:35:40,060 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 18:35:40,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:40,235 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:40,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1417856563, now seen corresponding path program 40 times [2021-08-06 18:35:40,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:40,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906644708] [2021-08-06 18:35:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:40,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:40,276 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:40,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:40,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:40,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:40,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:40,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:40,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:40,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906644708] [2021-08-06 18:35:40,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906644708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:40,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899758068] [2021-08-06 18:35:40,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:35:40,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:40,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:40,373 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 18:35:40,424 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 18:35:43,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:35:43,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:43,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:43,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:43,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:43,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:43,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:43,891 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:43,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899758068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:43,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:43,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:43,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534478973] [2021-08-06 18:35:43,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:43,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:43,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:43,896 INFO L87 Difference]: Start difference. First operand 1831 states and 2373 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:44,376 INFO L93 Difference]: Finished difference Result 3379 states and 4242 transitions. [2021-08-06 18:35:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:35:44,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:44,380 INFO L225 Difference]: With dead ends: 3379 [2021-08-06 18:35:44,380 INFO L226 Difference]: Without dead ends: 3299 [2021-08-06 18:35:44,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:35:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3299 states. [2021-08-06 18:35:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3299 to 1871. [2021-08-06 18:35:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1860 states have (on average 1.303763440860215) internal successors, (2425), 1870 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states 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 18:35:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2425 transitions. [2021-08-06 18:35:44,396 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2425 transitions. Word has length 67 [2021-08-06 18:35:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:44,396 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2425 transitions. [2021-08-06 18:35:44,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2425 transitions. [2021-08-06 18:35:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:44,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:44,398 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:35:44,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 18:35:44,599 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,SelfDestructingSolverStorable67 [2021-08-06 18:35:44,599 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:44,599 INFO L82 PathProgramCache]: Analyzing trace with hash 956453989, now seen corresponding path program 41 times [2021-08-06 18:35:44,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:44,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596950023] [2021-08-06 18:35:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:44,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:44,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:44,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:44,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:44,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:44,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:44,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:44,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:44,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596950023] [2021-08-06 18:35:44,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596950023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:44,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194374833] [2021-08-06 18:35:44,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:35:44,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:44,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:44,745 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 18:35:44,746 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 18:35:47,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:35:47,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:47,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:47,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:48,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:48,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:48,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194374833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:48,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:48,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:48,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020533232] [2021-08-06 18:35:48,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:48,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:48,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:48,318 INFO L87 Difference]: Start difference. First operand 1871 states and 2425 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:48,828 INFO L93 Difference]: Finished difference Result 3557 states and 4456 transitions. [2021-08-06 18:35:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 18:35:48,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:48,831 INFO L225 Difference]: With dead ends: 3557 [2021-08-06 18:35:48,831 INFO L226 Difference]: Without dead ends: 3477 [2021-08-06 18:35:48,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=489, Invalid=1317, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 18:35:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3477 states. [2021-08-06 18:35:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3477 to 1846. [2021-08-06 18:35:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1835 states have (on average 1.3046321525885558) internal successors, (2394), 1845 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states 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 18:35:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2394 transitions. [2021-08-06 18:35:48,849 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2394 transitions. Word has length 67 [2021-08-06 18:35:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:48,849 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 2394 transitions. [2021-08-06 18:35:48,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2394 transitions. [2021-08-06 18:35:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:48,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:48,851 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:35:48,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 18:35:49,053 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,SelfDestructingSolverStorable68 [2021-08-06 18:35:49,053 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:49,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1208084275, now seen corresponding path program 42 times [2021-08-06 18:35:49,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:49,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90136057] [2021-08-06 18:35:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:49,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:49,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:49,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:49,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:49,110 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:49,173 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:49,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:49,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:49,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90136057] [2021-08-06 18:35:49,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90136057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:49,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491156854] [2021-08-06 18:35:49,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:35:49,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:49,201 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 18:35:49,202 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 18:35:52,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:35:52,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:52,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:52,280 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:52,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:52,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:52,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:52,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491156854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:52,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:52,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:52,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923310948] [2021-08-06 18:35:52,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:52,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:52,787 INFO L87 Difference]: Start difference. First operand 1846 states and 2394 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:53,286 INFO L93 Difference]: Finished difference Result 3613 states and 4520 transitions. [2021-08-06 18:35:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:35:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:53,290 INFO L225 Difference]: With dead ends: 3613 [2021-08-06 18:35:53,290 INFO L226 Difference]: Without dead ends: 3533 [2021-08-06 18:35:53,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 18:35:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2021-08-06 18:35:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 1846. [2021-08-06 18:35:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1835 states have (on average 1.3046321525885558) internal successors, (2394), 1845 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states 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 18:35:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2394 transitions. [2021-08-06 18:35:53,308 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2394 transitions. Word has length 67 [2021-08-06 18:35:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:53,308 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 2394 transitions. [2021-08-06 18:35:53,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2394 transitions. [2021-08-06 18:35:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:53,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:53,310 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:35:53,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 18:35:53,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:53,511 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:53,511 INFO L82 PathProgramCache]: Analyzing trace with hash -869849151, now seen corresponding path program 43 times [2021-08-06 18:35:53,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:53,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039167952] [2021-08-06 18:35:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:53,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:53,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:53,549 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:53,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:53,559 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:53,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:53,622 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:53,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:53,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039167952] [2021-08-06 18:35:53,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039167952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:53,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761211877] [2021-08-06 18:35:53,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:35:53,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:53,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:53,646 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 18:35:53,646 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 18:35:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:56,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:56,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:56,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:57,222 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:57,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:57,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:57,231 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:57,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761211877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:57,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:57,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:57,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743128235] [2021-08-06 18:35:57,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:57,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:57,236 INFO L87 Difference]: Start difference. First operand 1846 states and 2394 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:57,685 INFO L93 Difference]: Finished difference Result 3512 states and 4413 transitions. [2021-08-06 18:35:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:35:57,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:57,688 INFO L225 Difference]: With dead ends: 3512 [2021-08-06 18:35:57,688 INFO L226 Difference]: Without dead ends: 3432 [2021-08-06 18:35:57,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 487.6ms TimeCoverageRelationStatistics Valid=501, Invalid=1391, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:35:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2021-08-06 18:35:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 1821. [2021-08-06 18:35:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1810 states have (on average 1.305524861878453) internal successors, (2363), 1820 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states 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 18:35:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2363 transitions. [2021-08-06 18:35:57,713 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2363 transitions. Word has length 67 [2021-08-06 18:35:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:57,713 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2363 transitions. [2021-08-06 18:35:57,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2363 transitions. [2021-08-06 18:35:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:57,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:57,714 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:35:57,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 18:35:57,915 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,SelfDestructingSolverStorable70 [2021-08-06 18:35:57,915 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:57,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:57,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1721899943, now seen corresponding path program 44 times [2021-08-06 18:35:57,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:57,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990314474] [2021-08-06 18:35:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:57,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:57,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:57,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:57,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:57,961 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:58,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:58,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:58,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:58,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990314474] [2021-08-06 18:35:58,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990314474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:58,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188307330] [2021-08-06 18:35:58,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:35:58,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:58,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:58,049 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 18:35:58,049 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 18:36:01,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:36:01,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:01,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:01,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:01,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:01,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:01,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:01,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:01,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188307330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:01,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:01,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:01,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216003371] [2021-08-06 18:36:01,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:01,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:01,819 INFO L87 Difference]: Start difference. First operand 1821 states and 2363 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:02,294 INFO L93 Difference]: Finished difference Result 3432 states and 4301 transitions. [2021-08-06 18:36:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:36:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:02,297 INFO L225 Difference]: With dead ends: 3432 [2021-08-06 18:36:02,297 INFO L226 Difference]: Without dead ends: 3352 [2021-08-06 18:36:02,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 536.3ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:36:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-08-06 18:36:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 1841. [2021-08-06 18:36:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1830 states have (on average 1.3021857923497269) internal successors, (2383), 1840 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states 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 18:36:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2383 transitions. [2021-08-06 18:36:02,314 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2383 transitions. Word has length 67 [2021-08-06 18:36:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:02,314 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2383 transitions. [2021-08-06 18:36:02,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2383 transitions. [2021-08-06 18:36:02,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:02,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:02,315 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:36:02,340 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 18:36:02,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:02,516 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:02,516 INFO L82 PathProgramCache]: Analyzing trace with hash 652410609, now seen corresponding path program 45 times [2021-08-06 18:36:02,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:02,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725164677] [2021-08-06 18:36:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:02,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:02,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:36:02,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:36:02,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:36:02,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:36:02,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:02,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:02,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:02,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725164677] [2021-08-06 18:36:02,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725164677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:02,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445096031] [2021-08-06 18:36:02,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:36:02,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:02,680 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 18:36:02,682 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 18:36:05,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:36:05,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:05,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:05,877 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:05,878 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:06,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:06,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:06,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445096031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:06,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:06,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:06,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347118597] [2021-08-06 18:36:06,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:06,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:06,429 INFO L87 Difference]: Start difference. First operand 1841 states and 2383 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:06,909 INFO L93 Difference]: Finished difference Result 3306 states and 4147 transitions. [2021-08-06 18:36:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:36:06,910 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:06,913 INFO L225 Difference]: With dead ends: 3306 [2021-08-06 18:36:06,913 INFO L226 Difference]: Without dead ends: 3226 [2021-08-06 18:36:06,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:36:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-08-06 18:36:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 1801. [2021-08-06 18:36:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1790 states have (on average 1.2955307262569833) internal successors, (2319), 1800 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states 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 18:36:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2319 transitions. [2021-08-06 18:36:06,929 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2319 transitions. Word has length 67 [2021-08-06 18:36:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:06,929 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 2319 transitions. [2021-08-06 18:36:06,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2319 transitions. [2021-08-06 18:36:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:06,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:06,931 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-08-06 18:36:06,956 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 18:36:07,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:07,131 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1261125341, now seen corresponding path program 14 times [2021-08-06 18:36:07,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:07,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769997755] [2021-08-06 18:36:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:07,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:07,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:36:07,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:36:07,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:36:07,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:36:07,257 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:36:07,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:36:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:07,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769997755] [2021-08-06 18:36:07,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769997755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216598060] [2021-08-06 18:36:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:36:07,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:07,285 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 18:36:07,286 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 18:36:10,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:36:10,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:10,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:10,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:10,968 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:10,969 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:10,977 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:10,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:10,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216598060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:10,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:10,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 18:36:10,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827481342] [2021-08-06 18:36:10,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 18:36:10,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 18:36:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-08-06 18:36:10,982 INFO L87 Difference]: Start difference. First operand 1801 states and 2319 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:11,167 INFO L93 Difference]: Finished difference Result 2722 states and 3431 transitions. [2021-08-06 18:36:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:36:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:11,169 INFO L225 Difference]: With dead ends: 2722 [2021-08-06 18:36:11,169 INFO L226 Difference]: Without dead ends: 2642 [2021-08-06 18:36:11,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:36:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-08-06 18:36:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1796. [2021-08-06 18:36:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1785 states have (on average 1.292997198879552) internal successors, (2308), 1795 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states 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 18:36:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2308 transitions. [2021-08-06 18:36:11,188 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2308 transitions. Word has length 67 [2021-08-06 18:36:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:11,188 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 2308 transitions. [2021-08-06 18:36:11,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2308 transitions. [2021-08-06 18:36:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:11,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:11,190 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-08-06 18:36:11,214 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 18:36:11,390 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,SelfDestructingSolverStorable73 [2021-08-06 18:36:11,390 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash -30877245, now seen corresponding path program 15 times [2021-08-06 18:36:11,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:11,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151121015] [2021-08-06 18:36:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:11,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:11,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:36:11,472 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:36:11,506 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:11,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:11,520 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:11,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:11,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:11,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151121015] [2021-08-06 18:36:11,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151121015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:11,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838999986] [2021-08-06 18:36:11,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:36:11,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:11,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:11,544 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 18:36:11,544 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 18:36:14,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 18:36:14,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:36:14,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:15,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:15,148 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:15,155 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:15,155 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:15,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838999986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:15,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:15,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-08-06 18:36:15,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722477309] [2021-08-06 18:36:15,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:36:15,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:36:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:36:15,160 INFO L87 Difference]: Start difference. First operand 1796 states and 2308 transitions. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 18:36:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:15,557 INFO L93 Difference]: Finished difference Result 3999 states and 5054 transitions. [2021-08-06 18:36:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 18:36:15,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:15,561 INFO L225 Difference]: With dead ends: 3999 [2021-08-06 18:36:15,561 INFO L226 Difference]: Without dead ends: 3759 [2021-08-06 18:36:15,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:36:15,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-08-06 18:36:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 1777. [2021-08-06 18:36:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1766 states have (on average 1.2950169875424689) internal successors, (2287), 1776 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states 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 18:36:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2287 transitions. [2021-08-06 18:36:15,578 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2287 transitions. Word has length 67 [2021-08-06 18:36:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:15,578 INFO L470 AbstractCegarLoop]: Abstraction has 1777 states and 2287 transitions. [2021-08-06 18:36:15,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 18:36:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2287 transitions. [2021-08-06 18:36:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:15,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:15,579 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:36:15,604 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 18:36:15,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:15,780 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:15,780 INFO L82 PathProgramCache]: Analyzing trace with hash 714105783, now seen corresponding path program 46 times [2021-08-06 18:36:15,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:15,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460716449] [2021-08-06 18:36:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:15,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:15,862 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:15,863 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:15,875 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:15,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:15,889 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:15,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:15,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:15,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460716449] [2021-08-06 18:36:15,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460716449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:15,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560895689] [2021-08-06 18:36:15,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:36:15,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:15,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:15,914 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 18:36:15,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 18:36:19,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:36:19,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:19,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:19,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:19,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560895689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:19,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:19,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:19,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052967064] [2021-08-06 18:36:19,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:19,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:19,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:19,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:19,751 INFO L87 Difference]: Start difference. First operand 1777 states and 2287 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:20,792 INFO L93 Difference]: Finished difference Result 4236 states and 5365 transitions. [2021-08-06 18:36:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 18:36:20,801 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:20,805 INFO L225 Difference]: With dead ends: 4236 [2021-08-06 18:36:20,805 INFO L226 Difference]: Without dead ends: 3996 [2021-08-06 18:36:20,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1015.5ms TimeCoverageRelationStatistics Valid=786, Invalid=2996, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 18:36:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2021-08-06 18:36:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 1852. [2021-08-06 18:36:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1841 states have (on average 1.2927756653992395) internal successors, (2380), 1851 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states 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 18:36:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2380 transitions. [2021-08-06 18:36:20,830 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2380 transitions. Word has length 67 [2021-08-06 18:36:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:20,830 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 2380 transitions. [2021-08-06 18:36:20,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2380 transitions. [2021-08-06 18:36:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:20,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:20,831 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:36:20,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 18:36:21,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:21,032 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:21,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1346500941, now seen corresponding path program 47 times [2021-08-06 18:36:21,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:21,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513302747] [2021-08-06 18:36:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:21,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:21,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:21,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:21,128 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:21,129 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:21,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:21,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:21,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:21,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513302747] [2021-08-06 18:36:21,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513302747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:21,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833765910] [2021-08-06 18:36:21,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:36:21,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:21,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:21,173 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:21,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 18:36:24,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:36:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:24,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:24,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:25,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:25,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:25,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833765910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:25,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:25,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:25,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151600042] [2021-08-06 18:36:25,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:25,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:25,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:25,040 INFO L87 Difference]: Start difference. First operand 1852 states and 2380 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:26,388 INFO L93 Difference]: Finished difference Result 4745 states and 6000 transitions. [2021-08-06 18:36:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 18:36:26,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:26,393 INFO L225 Difference]: With dead ends: 4745 [2021-08-06 18:36:26,393 INFO L226 Difference]: Without dead ends: 4505 [2021-08-06 18:36:26,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1292.8ms TimeCoverageRelationStatistics Valid=1124, Invalid=4132, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 18:36:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2021-08-06 18:36:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 1946. [2021-08-06 18:36:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1935 states have (on average 1.2930232558139534) internal successors, (2502), 1945 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states 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 18:36:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2502 transitions. [2021-08-06 18:36:26,413 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2502 transitions. Word has length 67 [2021-08-06 18:36:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:26,413 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2502 transitions. [2021-08-06 18:36:26,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2502 transitions. [2021-08-06 18:36:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:26,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:26,415 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:36:26,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 18:36:26,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:26,615 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1063059585, now seen corresponding path program 48 times [2021-08-06 18:36:26,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:26,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737808956] [2021-08-06 18:36:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:26,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:26,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:26,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:26,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:26,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:26,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:26,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:26,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:26,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737808956] [2021-08-06 18:36:26,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737808956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:26,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430163726] [2021-08-06 18:36:26,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:36:26,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:26,751 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:26,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 18:36:30,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:36:30,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:30,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:30,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:30,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:30,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:30,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430163726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:30,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:30,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:30,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150107778] [2021-08-06 18:36:30,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:30,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:30,781 INFO L87 Difference]: Start difference. First operand 1946 states and 2502 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:32,206 INFO L93 Difference]: Finished difference Result 4441 states and 5620 transitions. [2021-08-06 18:36:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 18:36:32,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:32,210 INFO L225 Difference]: With dead ends: 4441 [2021-08-06 18:36:32,210 INFO L226 Difference]: Without dead ends: 4201 [2021-08-06 18:36:32,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1363.2ms TimeCoverageRelationStatistics Valid=990, Invalid=3702, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 18:36:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-08-06 18:36:32,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 1916. [2021-08-06 18:36:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1905 states have (on average 1.2913385826771653) internal successors, (2460), 1915 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states 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 18:36:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2460 transitions. [2021-08-06 18:36:32,230 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2460 transitions. Word has length 67 [2021-08-06 18:36:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:32,230 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2460 transitions. [2021-08-06 18:36:32,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2460 transitions. [2021-08-06 18:36:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:32,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:32,232 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:36:32,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 18:36:32,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 18:36:32,432 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:32,432 INFO L82 PathProgramCache]: Analyzing trace with hash 498535031, now seen corresponding path program 49 times [2021-08-06 18:36:32,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:32,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029167135] [2021-08-06 18:36:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:32,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:32,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:36:32,525 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:36:32,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:32,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:32,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:32,548 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:32,560 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:32,561 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:32,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:32,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029167135] [2021-08-06 18:36:32,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029167135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:32,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010511464] [2021-08-06 18:36:32,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:36:32,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:32,585 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:32,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 18:36:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:35,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:36,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:36,622 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:36,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010511464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:36,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:36,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:36,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218544536] [2021-08-06 18:36:36,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:36,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:36,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:36,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:36,627 INFO L87 Difference]: Start difference. First operand 1916 states and 2460 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:38,482 INFO L93 Difference]: Finished difference Result 5245 states and 6608 transitions. [2021-08-06 18:36:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 18:36:38,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:38,487 INFO L225 Difference]: With dead ends: 5245 [2021-08-06 18:36:38,487 INFO L226 Difference]: Without dead ends: 5005 [2021-08-06 18:36:38,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 1764.5ms TimeCoverageRelationStatistics Valid=1434, Invalid=5208, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 18:36:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2021-08-06 18:36:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 1881. [2021-08-06 18:36:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1870 states have (on average 1.2935828877005349) internal successors, (2419), 1880 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states 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 18:36:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2419 transitions. [2021-08-06 18:36:38,510 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2419 transitions. Word has length 67 [2021-08-06 18:36:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:38,510 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 2419 transitions. [2021-08-06 18:36:38,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2419 transitions. [2021-08-06 18:36:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:38,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:38,512 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:36:38,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 18:36:38,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:38,712 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1464184763, now seen corresponding path program 50 times [2021-08-06 18:36:38,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:38,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694934023] [2021-08-06 18:36:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:38,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:38,795 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:38,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:38,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:38,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:38,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:38,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:38,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:38,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694934023] [2021-08-06 18:36:38,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694934023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:38,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445530866] [2021-08-06 18:36:38,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:36:38,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:38,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:38,844 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:38,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 18:36:42,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:36:42,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:42,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:42,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:42,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445530866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:42,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:42,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:42,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808732019] [2021-08-06 18:36:42,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:42,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:42,959 INFO L87 Difference]: Start difference. First operand 1881 states and 2419 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:44,565 INFO L93 Difference]: Finished difference Result 4704 states and 5967 transitions. [2021-08-06 18:36:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 18:36:44,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:44,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:44,570 INFO L225 Difference]: With dead ends: 4704 [2021-08-06 18:36:44,570 INFO L226 Difference]: Without dead ends: 4464 [2021-08-06 18:36:44,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 1514.9ms TimeCoverageRelationStatistics Valid=1381, Invalid=5099, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 18:36:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2021-08-06 18:36:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 1814. [2021-08-06 18:36:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1803 states have (on average 1.2889628397115918) internal successors, (2324), 1813 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states 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 18:36:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2324 transitions. [2021-08-06 18:36:44,591 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2324 transitions. Word has length 67 [2021-08-06 18:36:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:44,591 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 2324 transitions. [2021-08-06 18:36:44,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2324 transitions. [2021-08-06 18:36:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:44,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:44,592 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:36:44,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 18:36:44,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:44,809 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:44,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2029386035, now seen corresponding path program 51 times [2021-08-06 18:36:44,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:44,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579843543] [2021-08-06 18:36:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:44,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:44,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:44,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:44,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:44,928 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:44,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:44,940 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:44,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:44,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579843543] [2021-08-06 18:36:44,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579843543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:44,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425421860] [2021-08-06 18:36:44,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:36:44,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:44,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:44,964 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:44,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 18:36:48,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:36:48,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:48,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:48,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:48,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:48,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:48,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425421860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:48,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:48,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:48,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234098716] [2021-08-06 18:36:48,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:48,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:48,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:48,999 INFO L87 Difference]: Start difference. First operand 1814 states and 2324 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:50,692 INFO L93 Difference]: Finished difference Result 5035 states and 6365 transitions. [2021-08-06 18:36:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 18:36:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:50,697 INFO L225 Difference]: With dead ends: 5035 [2021-08-06 18:36:50,697 INFO L226 Difference]: Without dead ends: 4715 [2021-08-06 18:36:50,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 1598.9ms TimeCoverageRelationStatistics Valid=1636, Invalid=5846, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 18:36:50,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-08-06 18:36:50,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 2091. [2021-08-06 18:36:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2091 states, 2080 states have (on average 1.283173076923077) internal successors, (2669), 2090 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states 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 18:36:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2669 transitions. [2021-08-06 18:36:50,718 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2669 transitions. Word has length 67 [2021-08-06 18:36:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:50,718 INFO L470 AbstractCegarLoop]: Abstraction has 2091 states and 2669 transitions. [2021-08-06 18:36:50,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2669 transitions. [2021-08-06 18:36:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:50,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:50,720 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:36:50,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 18:36:50,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-08-06 18:36:50,921 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:50,921 INFO L82 PathProgramCache]: Analyzing trace with hash 417473139, now seen corresponding path program 52 times [2021-08-06 18:36:50,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:50,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418137986] [2021-08-06 18:36:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:50,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:50,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:36:50,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:36:51,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:51,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:51,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:51,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:51,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:51,034 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:51,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:51,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418137986] [2021-08-06 18:36:51,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418137986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:51,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038721052] [2021-08-06 18:36:51,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:36:51,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:51,058 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:51,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 18:36:54,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:36:54,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:54,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:55,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:55,240 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:55,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038721052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:55,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:55,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:55,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612475072] [2021-08-06 18:36:55,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:55,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:55,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:55,245 INFO L87 Difference]: Start difference. First operand 2091 states and 2669 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:57,113 INFO L93 Difference]: Finished difference Result 5941 states and 7487 transitions. [2021-08-06 18:36:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 18:36:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:57,121 INFO L225 Difference]: With dead ends: 5941 [2021-08-06 18:36:57,121 INFO L226 Difference]: Without dead ends: 5701 [2021-08-06 18:36:57,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 1751.3ms TimeCoverageRelationStatistics Valid=1576, Invalid=5396, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 18:36:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-08-06 18:36:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 2066. [2021-08-06 18:36:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2055 states have (on average 1.283698296836983) internal successors, (2638), 2065 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states 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 18:36:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 2638 transitions. [2021-08-06 18:36:57,145 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 2638 transitions. Word has length 67 [2021-08-06 18:36:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:57,145 INFO L470 AbstractCegarLoop]: Abstraction has 2066 states and 2638 transitions. [2021-08-06 18:36:57,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 2638 transitions. [2021-08-06 18:36:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:57,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:57,147 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:36:57,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 18:36:57,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:57,349 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:57,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1545246655, now seen corresponding path program 53 times [2021-08-06 18:36:57,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:57,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888069466] [2021-08-06 18:36:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:57,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:57,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:57,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:57,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:57,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:57,468 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:57,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:57,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:57,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888069466] [2021-08-06 18:36:57,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888069466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:57,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824069081] [2021-08-06 18:36:57,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:36:57,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:57,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:57,492 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:57,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 18:37:00,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:37:00,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:00,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:01,693 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:01,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:01,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824069081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:01,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:01,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:01,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833917884] [2021-08-06 18:37:01,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:01,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:01,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:01,698 INFO L87 Difference]: Start difference. First operand 2066 states and 2638 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:03,507 INFO L93 Difference]: Finished difference Result 5586 states and 7038 transitions. [2021-08-06 18:37:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-06 18:37:03,507 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:03,512 INFO L225 Difference]: With dead ends: 5586 [2021-08-06 18:37:03,512 INFO L226 Difference]: Without dead ends: 5346 [2021-08-06 18:37:03,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 1667.2ms TimeCoverageRelationStatistics Valid=1763, Invalid=6247, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 18:37:03,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2021-08-06 18:37:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 2036. [2021-08-06 18:37:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2025 states have (on average 1.2819753086419754) internal successors, (2596), 2035 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states 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 18:37:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 2596 transitions. [2021-08-06 18:37:03,537 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 2596 transitions. Word has length 67 [2021-08-06 18:37:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:03,537 INFO L470 AbstractCegarLoop]: Abstraction has 2036 states and 2596 transitions. [2021-08-06 18:37:03,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 2596 transitions. [2021-08-06 18:37:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:03,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:03,539 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:37:03,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 18:37:03,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:03,739 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1684292685, now seen corresponding path program 54 times [2021-08-06 18:37:03,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:03,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519705976] [2021-08-06 18:37:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:03,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:03,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:03,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:03,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:03,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:03,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:03,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:03,825 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:03,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:03,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:03,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:03,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:03,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:03,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:03,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519705976] [2021-08-06 18:37:03,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519705976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:03,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614371873] [2021-08-06 18:37:03,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:37:03,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:03,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:03,875 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:03,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 18:37:07,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:37:07,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:07,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:07,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:37:07,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:37:08,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:08,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:08,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614371873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:08,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:08,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:08,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301735388] [2021-08-06 18:37:08,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:08,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:08,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:08,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:08,056 INFO L87 Difference]: Start difference. First operand 2036 states and 2596 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:09,895 INFO L93 Difference]: Finished difference Result 5943 states and 7445 transitions. [2021-08-06 18:37:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 18:37:09,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:09,901 INFO L225 Difference]: With dead ends: 5943 [2021-08-06 18:37:09,901 INFO L226 Difference]: Without dead ends: 5703 [2021-08-06 18:37:09,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3747 ImplicationChecksByTransitivity, 1715.5ms TimeCoverageRelationStatistics Valid=2111, Invalid=7989, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 18:37:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-08-06 18:37:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 2106. [2021-08-06 18:37:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2095 states have (on average 1.2782816229116944) internal successors, (2678), 2105 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states 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 18:37:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 2678 transitions. [2021-08-06 18:37:09,927 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 2678 transitions. Word has length 67 [2021-08-06 18:37:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:09,928 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 2678 transitions. [2021-08-06 18:37:09,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 2678 transitions. [2021-08-06 18:37:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:09,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:09,929 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:37:09,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:10,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:10,145 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:10,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1599368397, now seen corresponding path program 55 times [2021-08-06 18:37:10,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:10,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446134639] [2021-08-06 18:37:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:10,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:10,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:10,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:10,261 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:10,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:10,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:10,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:10,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:10,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446134639] [2021-08-06 18:37:10,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446134639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:10,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159098602] [2021-08-06 18:37:10,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:37:10,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:10,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:10,314 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:10,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 18:37:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:13,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:14,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:14,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:14,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159098602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:14,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:14,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:14,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414000054] [2021-08-06 18:37:14,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:14,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:14,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:14,520 INFO L87 Difference]: Start difference. First operand 2106 states and 2678 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:16,164 INFO L93 Difference]: Finished difference Result 5408 states and 6840 transitions. [2021-08-06 18:37:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 18:37:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:16,169 INFO L225 Difference]: With dead ends: 5408 [2021-08-06 18:37:16,169 INFO L226 Difference]: Without dead ends: 5168 [2021-08-06 18:37:16,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2958 ImplicationChecksByTransitivity, 1519.1ms TimeCoverageRelationStatistics Valid=1750, Invalid=6260, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 18:37:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2021-08-06 18:37:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 2201. [2021-08-06 18:37:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2190 states have (on average 1.2853881278538812) internal successors, (2815), 2200 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states 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 18:37:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 2815 transitions. [2021-08-06 18:37:16,190 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 2815 transitions. Word has length 67 [2021-08-06 18:37:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:16,190 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 2815 transitions. [2021-08-06 18:37:16,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:16,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 2815 transitions. [2021-08-06 18:37:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:16,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:16,192 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:37:16,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 18:37:16,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-06 18:37:16,393 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1875932097, now seen corresponding path program 56 times [2021-08-06 18:37:16,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:16,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969048008] [2021-08-06 18:37:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:16,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:16,458 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:16,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:16,468 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:16,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:16,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:16,480 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:16,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:16,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:16,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:16,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:16,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:16,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969048008] [2021-08-06 18:37:16,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969048008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:16,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984173666] [2021-08-06 18:37:16,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:37:16,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:16,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:16,529 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:16,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 18:37:20,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:37:20,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:20,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:20,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:20,816 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:20,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:20,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984173666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:20,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:20,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:20,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8524275] [2021-08-06 18:37:20,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:20,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:20,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:20,822 INFO L87 Difference]: Start difference. First operand 2201 states and 2815 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:22,662 INFO L93 Difference]: Finished difference Result 5809 states and 7339 transitions. [2021-08-06 18:37:22,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 18:37:22,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:22,667 INFO L225 Difference]: With dead ends: 5809 [2021-08-06 18:37:22,667 INFO L226 Difference]: Without dead ends: 5569 [2021-08-06 18:37:22,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 1715.5ms TimeCoverageRelationStatistics Valid=1849, Invalid=6893, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 18:37:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2021-08-06 18:37:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 2166. [2021-08-06 18:37:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2155 states have (on average 1.2816705336426915) internal successors, (2762), 2165 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states 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 18:37:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 2762 transitions. [2021-08-06 18:37:22,689 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 2762 transitions. Word has length 67 [2021-08-06 18:37:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:22,689 INFO L470 AbstractCegarLoop]: Abstraction has 2166 states and 2762 transitions. [2021-08-06 18:37:22,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 2762 transitions. [2021-08-06 18:37:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:22,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:22,691 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:37:22,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:22,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-06 18:37:22,892 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1532355451, now seen corresponding path program 57 times [2021-08-06 18:37:22,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:22,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124124380] [2021-08-06 18:37:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:22,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:22,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:22,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:22,988 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:22,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:23,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:23,002 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:23,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:23,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124124380] [2021-08-06 18:37:23,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124124380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:23,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551537907] [2021-08-06 18:37:23,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:37:23,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:23,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:23,025 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:23,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 18:37:26,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:37:26,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:27,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:27,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:27,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551537907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:27,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:27,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:27,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171260782] [2021-08-06 18:37:27,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:27,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:27,381 INFO L87 Difference]: Start difference. First operand 2166 states and 2762 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:28,719 INFO L93 Difference]: Finished difference Result 5533 states and 7043 transitions. [2021-08-06 18:37:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 18:37:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:28,724 INFO L225 Difference]: With dead ends: 5533 [2021-08-06 18:37:28,724 INFO L226 Difference]: Without dead ends: 5293 [2021-08-06 18:37:28,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 1267.3ms TimeCoverageRelationStatistics Valid=1241, Invalid=4161, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 18:37:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2021-08-06 18:37:28,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 2161. [2021-08-06 18:37:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2150 states have (on average 1.2795348837209302) internal successors, (2751), 2160 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states 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 18:37:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 2751 transitions. [2021-08-06 18:37:28,755 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 2751 transitions. Word has length 67 [2021-08-06 18:37:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:28,755 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 2751 transitions. [2021-08-06 18:37:28,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 2751 transitions. [2021-08-06 18:37:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:28,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:28,757 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:37:28,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 18:37:28,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-06 18:37:28,958 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:28,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1723994863, now seen corresponding path program 58 times [2021-08-06 18:37:28,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:28,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832771832] [2021-08-06 18:37:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:28,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:29,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:29,044 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:29,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:29,056 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:29,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:29,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:29,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:29,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832771832] [2021-08-06 18:37:29,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832771832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:29,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304407246] [2021-08-06 18:37:29,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:37:29,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:29,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:29,091 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:29,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 18:37:32,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:37:32,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:32,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:32,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:33,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:37:33,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:37:33,418 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:33,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:33,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:33,427 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:33,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304407246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:33,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:33,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:33,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051860487] [2021-08-06 18:37:33,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:33,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:33,432 INFO L87 Difference]: Start difference. First operand 2161 states and 2751 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:34,734 INFO L93 Difference]: Finished difference Result 5569 states and 7027 transitions. [2021-08-06 18:37:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 18:37:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:34,740 INFO L225 Difference]: With dead ends: 5569 [2021-08-06 18:37:34,740 INFO L226 Difference]: Without dead ends: 5329 [2021-08-06 18:37:34,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1221.6ms TimeCoverageRelationStatistics Valid=1427, Invalid=5215, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 18:37:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-08-06 18:37:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 2142. [2021-08-06 18:37:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2131 states have (on average 1.2824964805255747) internal successors, (2733), 2141 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states 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 18:37:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2733 transitions. [2021-08-06 18:37:34,762 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2733 transitions. Word has length 67 [2021-08-06 18:37:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:34,762 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 2733 transitions. [2021-08-06 18:37:34,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:34,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2733 transitions. [2021-08-06 18:37:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:34,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:34,764 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:37:34,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 18:37:34,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 18:37:34,964 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:34,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:34,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1927201657, now seen corresponding path program 59 times [2021-08-06 18:37:34,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:34,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230341765] [2021-08-06 18:37:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:34,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:35,097 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:35,098 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:35,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:35,110 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:35,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:35,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:35,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:35,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230341765] [2021-08-06 18:37:35,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230341765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:35,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115735820] [2021-08-06 18:37:35,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:37:35,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:35,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:35,144 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:35,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 18:37:38,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:37:38,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:39,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:39,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:39,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115735820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:39,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:39,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:39,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469626173] [2021-08-06 18:37:39,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:39,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:39,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:39,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:39,616 INFO L87 Difference]: Start difference. First operand 2142 states and 2733 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:41,082 INFO L93 Difference]: Finished difference Result 5549 states and 7035 transitions. [2021-08-06 18:37:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 18:37:41,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:41,087 INFO L225 Difference]: With dead ends: 5549 [2021-08-06 18:37:41,087 INFO L226 Difference]: Without dead ends: 5309 [2021-08-06 18:37:41,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 1425.4ms TimeCoverageRelationStatistics Valid=1168, Invalid=4234, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 18:37:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2021-08-06 18:37:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 2072. [2021-08-06 18:37:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2061 states have (on average 1.2862688015526444) internal successors, (2651), 2071 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states 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 18:37:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2651 transitions. [2021-08-06 18:37:41,109 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2651 transitions. Word has length 67 [2021-08-06 18:37:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:41,109 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 2651 transitions. [2021-08-06 18:37:41,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2651 transitions. [2021-08-06 18:37:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:41,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:41,111 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-06 18:37:41,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:41,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:41,311 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1970221971, now seen corresponding path program 60 times [2021-08-06 18:37:41,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:41,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508766619] [2021-08-06 18:37:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:41,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:41,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:41,387 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:41,397 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:41,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:41,409 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:41,410 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:41,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:41,423 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:41,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:41,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508766619] [2021-08-06 18:37:41,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508766619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:41,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463242959] [2021-08-06 18:37:41,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:37:41,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:41,457 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:41,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 18:37:45,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:37:45,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:46,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:46,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:46,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463242959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:46,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:46,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:46,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948511588] [2021-08-06 18:37:46,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:46,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:46,025 INFO L87 Difference]: Start difference. First operand 2072 states and 2651 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:47,145 INFO L93 Difference]: Finished difference Result 5304 states and 6676 transitions. [2021-08-06 18:37:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 18:37:47,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:47,150 INFO L225 Difference]: With dead ends: 5304 [2021-08-06 18:37:47,150 INFO L226 Difference]: Without dead ends: 5064 [2021-08-06 18:37:47,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 1084.0ms TimeCoverageRelationStatistics Valid=1019, Invalid=3951, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 18:37:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-08-06 18:37:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 2051. [2021-08-06 18:37:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2040 states have (on average 1.2769607843137254) internal successors, (2605), 2050 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states 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 18:37:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 2605 transitions. [2021-08-06 18:37:47,172 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 2605 transitions. Word has length 67 [2021-08-06 18:37:47,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:47,172 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 2605 transitions. [2021-08-06 18:37:47,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:47,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 2605 transitions. [2021-08-06 18:37:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:37:47,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:47,174 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 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] [2021-08-06 18:37:47,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:47,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:47,374 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash 438507014, now seen corresponding path program 16 times [2021-08-06 18:37:47,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:47,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642637407] [2021-08-06 18:37:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:47,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:47,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:37:47,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:37:47,536 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:47,537 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:47,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:47,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642637407] [2021-08-06 18:37:47,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642637407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:47,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130949552] [2021-08-06 18:37:47,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:37:47,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:47,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:47,564 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:47,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 18:37:51,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:37:51,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:51,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:37:51,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:51,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:51,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:52,232 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:52,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:52,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130949552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:52,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:52,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:37:52,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571204592] [2021-08-06 18:37:52,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:37:52,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:37:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:37:52,237 INFO L87 Difference]: Start difference. First operand 2051 states and 2605 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:52,352 INFO L93 Difference]: Finished difference Result 3352 states and 4212 transitions. [2021-08-06 18:37:52,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:37:52,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:37:52,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:52,355 INFO L225 Difference]: With dead ends: 3352 [2021-08-06 18:37:52,355 INFO L226 Difference]: Without dead ends: 3272 [2021-08-06 18:37:52,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:37:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-08-06 18:37:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2105. [2021-08-06 18:37:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2105 states, 2094 states have (on average 1.2908309455587392) internal successors, (2703), 2104 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states 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 18:37:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 2703 transitions. [2021-08-06 18:37:52,373 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 2703 transitions. Word has length 72 [2021-08-06 18:37:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:52,373 INFO L470 AbstractCegarLoop]: Abstraction has 2105 states and 2703 transitions. [2021-08-06 18:37:52,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 2703 transitions. [2021-08-06 18:37:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:37:52,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:52,375 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2021-08-06 18:37:52,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 18:37:52,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:52,575 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:52,576 INFO L82 PathProgramCache]: Analyzing trace with hash -938910576, now seen corresponding path program 61 times [2021-08-06 18:37:52,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:52,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570640008] [2021-08-06 18:37:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:52,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:52,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:37:52,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:37:52,711 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:37:52,712 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:37:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:52,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:52,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570640008] [2021-08-06 18:37:52,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570640008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:52,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235270901] [2021-08-06 18:37:52,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:37:52,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:52,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:52,738 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:52,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 18:37:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:56,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:37:56,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:56,844 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:56,845 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:57,479 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:57,480 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:57,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:57,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:57,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235270901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:57,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:57,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:37:57,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569924853] [2021-08-06 18:37:57,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:37:57,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:57,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:37:57,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:37:57,493 INFO L87 Difference]: Start difference. First operand 2105 states and 2703 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:57,837 INFO L93 Difference]: Finished difference Result 3701 states and 4647 transitions. [2021-08-06 18:37:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:37:57,837 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:37:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:57,841 INFO L225 Difference]: With dead ends: 3701 [2021-08-06 18:37:57,841 INFO L226 Difference]: Without dead ends: 3621 [2021-08-06 18:37:57,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 18:37:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-08-06 18:37:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 2115. [2021-08-06 18:37:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2104 states have (on average 1.289448669201521) internal successors, (2713), 2114 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states 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 18:37:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 2713 transitions. [2021-08-06 18:37:57,859 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 2713 transitions. Word has length 72 [2021-08-06 18:37:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:57,859 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 2713 transitions. [2021-08-06 18:37:57,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 2713 transitions. [2021-08-06 18:37:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:37:57,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:57,861 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:37:57,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:58,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:58,061 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:58,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:58,061 INFO L82 PathProgramCache]: Analyzing trace with hash 621165014, now seen corresponding path program 62 times [2021-08-06 18:37:58,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:58,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852273973] [2021-08-06 18:37:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:58,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:58,099 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:37:58,100 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:37:58,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:37:58,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:37:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:58,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:58,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852273973] [2021-08-06 18:37:58,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852273973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:58,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941088531] [2021-08-06 18:37:58,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:37:58,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:58,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:58,221 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:58,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 18:38:02,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:38:02,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:38:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:02,432 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:02,434 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:03,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:03,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:03,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:03,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:03,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941088531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:03,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:03,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:38:03,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167837590] [2021-08-06 18:38:03,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:38:03,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:03,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:38:03,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:38:03,031 INFO L87 Difference]: Start difference. First operand 2115 states and 2713 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:03,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:03,504 INFO L93 Difference]: Finished difference Result 4086 states and 5118 transitions. [2021-08-06 18:38:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:38:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:03,508 INFO L225 Difference]: With dead ends: 4086 [2021-08-06 18:38:03,508 INFO L226 Difference]: Without dead ends: 4006 [2021-08-06 18:38:03,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:38:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2021-08-06 18:38:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 2140. [2021-08-06 18:38:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2129 states have (on average 1.2888680131517145) internal successors, (2744), 2139 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states 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 18:38:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2744 transitions. [2021-08-06 18:38:03,527 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2744 transitions. Word has length 72 [2021-08-06 18:38:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:03,527 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2744 transitions. [2021-08-06 18:38:03,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2744 transitions. [2021-08-06 18:38:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:03,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:03,529 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:38:03,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 18:38:03,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:03,729 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:38:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:03,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1148321490, now seen corresponding path program 63 times [2021-08-06 18:38:03,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:03,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650486450] [2021-08-06 18:38:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:03,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:03,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:03,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:03,870 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:03,871 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:03,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:03,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650486450] [2021-08-06 18:38:03,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650486450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:03,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843686015] [2021-08-06 18:38:03,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:38:03,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:03,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:03,897 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:03,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 18:38:07,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:38:07,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:38:07,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:08,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:08,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:10,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:10,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:10,956 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:10,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:10,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843686015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:10,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:10,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:38:10,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134553595] [2021-08-06 18:38:10,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:38:10,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:10,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:38:10,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=414, Unknown=1, NotChecked=0, Total=552 [2021-08-06 18:38:10,962 INFO L87 Difference]: Start difference. First operand 2140 states and 2744 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:23,681 INFO L93 Difference]: Finished difference Result 4334 states and 5438 transitions. [2021-08-06 18:38:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:38:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:23,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:23,686 INFO L225 Difference]: With dead ends: 4334 [2021-08-06 18:38:23,686 INFO L226 Difference]: Without dead ends: 4254 [2021-08-06 18:38:23,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 10775.1ms TimeCoverageRelationStatistics Valid=470, Invalid=1421, Unknown=1, NotChecked=0, Total=1892 [2021-08-06 18:38:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-08-06 18:38:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 2175. [2021-08-06 18:38:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2164 states have (on average 1.2869685767097967) internal successors, (2785), 2174 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states 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 18:38:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 2785 transitions. [2021-08-06 18:38:23,706 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 2785 transitions. Word has length 72 [2021-08-06 18:38:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 2175 states and 2785 transitions. [2021-08-06 18:38:23,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 2785 transitions. [2021-08-06 18:38:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:23,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:23,708 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:38:23,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 18:38:23,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-06 18:38:23,921 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:38:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:23,921 INFO L82 PathProgramCache]: Analyzing trace with hash 807913284, now seen corresponding path program 64 times [2021-08-06 18:38:23,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:23,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404539751] [2021-08-06 18:38:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:23,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:23,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:23,962 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:24,053 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:24,054 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:24,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:24,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404539751] [2021-08-06 18:38:24,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404539751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:24,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215848737] [2021-08-06 18:38:24,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:38:24,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:24,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:24,080 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:24,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 18:38:28,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:38:28,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:28,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:38:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:28,393 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:28,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:29,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:29,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:29,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:29,075 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:29,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215848737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:29,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:29,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:38:29,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016200284] [2021-08-06 18:38:29,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:38:29,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:38:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:38:29,080 INFO L87 Difference]: Start difference. First operand 2175 states and 2785 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:29,639 INFO L93 Difference]: Finished difference Result 4095 states and 5157 transitions. [2021-08-06 18:38:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 18:38:29,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:29,643 INFO L225 Difference]: With dead ends: 4095 [2021-08-06 18:38:29,643 INFO L226 Difference]: Without dead ends: 4015 [2021-08-06 18:38:29,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 646.9ms TimeCoverageRelationStatistics Valid=511, Invalid=1469, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 18:38:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2021-08-06 18:38:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 2175. [2021-08-06 18:38:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2164 states have (on average 1.2869685767097967) internal successors, (2785), 2174 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states 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 18:38:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 2785 transitions. [2021-08-06 18:38:29,662 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 2785 transitions. Word has length 72 [2021-08-06 18:38:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:29,663 INFO L470 AbstractCegarLoop]: Abstraction has 2175 states and 2785 transitions. [2021-08-06 18:38:29,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 2785 transitions. [2021-08-06 18:38:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:29,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:29,664 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:38:29,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:29,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-06 18:38:29,865 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:38:29,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:29,865 INFO L82 PathProgramCache]: Analyzing trace with hash -65198188, now seen corresponding path program 65 times [2021-08-06 18:38:29,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:29,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534681298] [2021-08-06 18:38:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:29,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:29,906 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:29,907 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:29,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:29,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:30,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:30,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534681298] [2021-08-06 18:38:30,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534681298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:30,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628420888] [2021-08-06 18:38:30,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:38:30,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:30,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:30,024 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:30,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 18:38:34,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:38:34,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:38:34,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:34,403 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:34,405 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:34,983 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:34,984 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:34,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:34,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:34,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628420888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:34,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:34,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:38:34,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156816374] [2021-08-06 18:38:34,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:38:34,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:38:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:38:34,996 INFO L87 Difference]: Start difference. First operand 2175 states and 2785 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:35,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:35,655 INFO L93 Difference]: Finished difference Result 4187 states and 5257 transitions. [2021-08-06 18:38:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:38:35,656 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:35,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:35,660 INFO L225 Difference]: With dead ends: 4187 [2021-08-06 18:38:35,660 INFO L226 Difference]: Without dead ends: 4107 [2021-08-06 18:38:35,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 728.4ms TimeCoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:38:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-08-06 18:38:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 2240. [2021-08-06 18:38:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2229 states have (on average 1.285329744279946) internal successors, (2865), 2239 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states 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 18:38:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2865 transitions. [2021-08-06 18:38:35,680 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2865 transitions. Word has length 72 [2021-08-06 18:38:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:35,680 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 2865 transitions. [2021-08-06 18:38:35,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2865 transitions. [2021-08-06 18:38:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:35,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:35,682 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:38:35,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 18:38:35,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:35,883 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:38:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:35,883 INFO L82 PathProgramCache]: Analyzing trace with hash 868611926, now seen corresponding path program 66 times [2021-08-06 18:38:35,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:35,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055878275] [2021-08-06 18:38:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:35,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:35,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:35,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:36,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:36,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:36,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:36,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055878275] [2021-08-06 18:38:36,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055878275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:36,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290940883] [2021-08-06 18:38:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:38:36,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:36,069 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:36,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 18:38:40,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:38:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:40,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:38:40,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:40,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:40,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:43,376 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:43,377 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:43,385 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:43,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:43,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290940883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:43,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:43,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:38:43,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692510502] [2021-08-06 18:38:43,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:38:43,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:43,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:38:43,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=419, Unknown=1, NotChecked=0, Total=552 [2021-08-06 18:38:43,403 INFO L87 Difference]: Start difference. First operand 2240 states and 2865 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:58,375 INFO L93 Difference]: Finished difference Result 4268 states and 5360 transitions. [2021-08-06 18:38:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:38:58,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:58,380 INFO L225 Difference]: With dead ends: 4268 [2021-08-06 18:38:58,380 INFO L226 Difference]: Without dead ends: 4188 [2021-08-06 18:38:58,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 15035.7ms TimeCoverageRelationStatistics Valid=554, Invalid=1607, Unknown=1, NotChecked=0, Total=2162 [2021-08-06 18:38:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-08-06 18:38:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 2225. [2021-08-06 18:38:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2214 states have (on average 1.2859078590785908) internal successors, (2847), 2224 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states 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 18:38:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2847 transitions. [2021-08-06 18:38:58,400 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2847 transitions. Word has length 72 [2021-08-06 18:38:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:58,400 INFO L470 AbstractCegarLoop]: Abstraction has 2225 states and 2847 transitions. [2021-08-06 18:38:58,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2847 transitions. [2021-08-06 18:38:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:58,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:58,402 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:38:58,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 18:38:58,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:58,603 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:38:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:58,603 INFO L82 PathProgramCache]: Analyzing trace with hash 528203720, now seen corresponding path program 67 times [2021-08-06 18:38:58,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:58,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383543883] [2021-08-06 18:38:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:58,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:58,645 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:58,646 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:58,735 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:58,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:38:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:58,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:58,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383543883] [2021-08-06 18:38:58,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383543883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:58,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965286918] [2021-08-06 18:38:58,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:38:58,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:58,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:58,762 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:58,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 18:39:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:03,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:03,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:03,257 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:03,258 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:03,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:03,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:03,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:03,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:03,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965286918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:03,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:03,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:39:03,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983220546] [2021-08-06 18:39:03,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:39:03,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:39:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:39:03,937 INFO L87 Difference]: Start difference. First operand 2225 states and 2847 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:04,668 INFO L93 Difference]: Finished difference Result 4213 states and 5295 transitions. [2021-08-06 18:39:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:39:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:04,672 INFO L225 Difference]: With dead ends: 4213 [2021-08-06 18:39:04,672 INFO L226 Difference]: Without dead ends: 4133 [2021-08-06 18:39:04,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 797.6ms TimeCoverageRelationStatistics Valid=582, Invalid=1674, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:39:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-08-06 18:39:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 2260. [2021-08-06 18:39:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2249 states have (on average 1.2894619831036016) internal successors, (2900), 2259 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states 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 18:39:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2900 transitions. [2021-08-06 18:39:04,692 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2900 transitions. Word has length 72 [2021-08-06 18:39:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:04,692 INFO L470 AbstractCegarLoop]: Abstraction has 2260 states and 2900 transitions. [2021-08-06 18:39:04,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2900 transitions. [2021-08-06 18:39:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:04,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:04,694 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:39:04,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 18:39:04,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:04,895 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1392453024, now seen corresponding path program 68 times [2021-08-06 18:39:04,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:04,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625145659] [2021-08-06 18:39:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:04,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:04,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:04,970 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:05,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:05,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:05,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:05,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625145659] [2021-08-06 18:39:05,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625145659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:05,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831126242] [2021-08-06 18:39:05,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:39:05,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:05,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:05,088 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:05,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 18:39:09,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:39:09,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:09,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:09,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:09,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:09,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:10,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:10,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:10,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:10,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:10,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831126242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:10,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:10,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:39:10,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185610725] [2021-08-06 18:39:10,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:39:10,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:10,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:39:10,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:39:10,262 INFO L87 Difference]: Start difference. First operand 2260 states and 2900 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:10,968 INFO L93 Difference]: Finished difference Result 4263 states and 5357 transitions. [2021-08-06 18:39:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:39:10,968 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:10,972 INFO L225 Difference]: With dead ends: 4263 [2021-08-06 18:39:10,972 INFO L226 Difference]: Without dead ends: 4183 [2021-08-06 18:39:10,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 787.1ms TimeCoverageRelationStatistics Valid=586, Invalid=1670, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:39:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2021-08-06 18:39:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 2240. [2021-08-06 18:39:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2229 states have (on average 1.2866756393001346) internal successors, (2868), 2239 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 18:39:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2868 transitions. [2021-08-06 18:39:11,006 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2868 transitions. Word has length 72 [2021-08-06 18:39:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:11,006 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 2868 transitions. [2021-08-06 18:39:11,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2868 transitions. [2021-08-06 18:39:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:11,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:11,008 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:39:11,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:11,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:11,233 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:11,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1831586282, now seen corresponding path program 69 times [2021-08-06 18:39:11,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:11,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643229216] [2021-08-06 18:39:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:11,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:11,276 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:11,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:11,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:11,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:11,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:11,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643229216] [2021-08-06 18:39:11,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643229216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:11,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079126771] [2021-08-06 18:39:11,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:39:11,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:11,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:11,395 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:11,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 18:39:15,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:39:15,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:15,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:15,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:16,046 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:16,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:16,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:16,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:16,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:16,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:16,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079126771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:16,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:16,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:39:16,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250054314] [2021-08-06 18:39:16,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:39:16,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:16,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:39:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:39:16,666 INFO L87 Difference]: Start difference. First operand 2240 states and 2868 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:17,426 INFO L93 Difference]: Finished difference Result 4278 states and 5362 transitions. [2021-08-06 18:39:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 18:39:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:17,431 INFO L225 Difference]: With dead ends: 4278 [2021-08-06 18:39:17,431 INFO L226 Difference]: Without dead ends: 4198 [2021-08-06 18:39:17,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 812.6ms TimeCoverageRelationStatistics Valid=664, Invalid=1988, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 18:39:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-08-06 18:39:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 2245. [2021-08-06 18:39:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2234 states have (on average 1.2887197851387646) internal successors, (2879), 2244 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states 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 18:39:17,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 2879 transitions. [2021-08-06 18:39:17,450 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 2879 transitions. Word has length 72 [2021-08-06 18:39:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:17,451 INFO L470 AbstractCegarLoop]: Abstraction has 2245 states and 2879 transitions. [2021-08-06 18:39:17,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 2879 transitions. [2021-08-06 18:39:17,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:17,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:17,452 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:39:17,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:17,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 18:39:17,653 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1219194518, now seen corresponding path program 70 times [2021-08-06 18:39:17,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:17,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714379478] [2021-08-06 18:39:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:17,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:17,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:17,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:17,821 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:17,822 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:17,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:17,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714379478] [2021-08-06 18:39:17,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714379478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:17,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222464655] [2021-08-06 18:39:17,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:39:17,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:17,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:17,849 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:17,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 18:39:22,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:39:22,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:22,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:22,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:22,559 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:23,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:23,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:23,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:23,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:23,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222464655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:23,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:23,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:39:23,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398768815] [2021-08-06 18:39:23,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:39:23,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:39:23,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:39:23,199 INFO L87 Difference]: Start difference. First operand 2245 states and 2879 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:23,920 INFO L93 Difference]: Finished difference Result 4269 states and 5371 transitions. [2021-08-06 18:39:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 18:39:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:23,924 INFO L225 Difference]: With dead ends: 4269 [2021-08-06 18:39:23,924 INFO L226 Difference]: Without dead ends: 4189 [2021-08-06 18:39:23,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 824.8ms TimeCoverageRelationStatistics Valid=651, Invalid=1799, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 18:39:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-08-06 18:39:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 2255. [2021-08-06 18:39:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2244 states have (on average 1.2927807486631016) internal successors, (2901), 2254 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states 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 18:39:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 2901 transitions. [2021-08-06 18:39:23,945 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 2901 transitions. Word has length 72 [2021-08-06 18:39:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:23,946 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 2901 transitions. [2021-08-06 18:39:23,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 2901 transitions. [2021-08-06 18:39:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:23,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:23,947 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:39:23,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 18:39:24,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 18:39:24,149 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:24,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1283578870, now seen corresponding path program 71 times [2021-08-06 18:39:24,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:24,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213263768] [2021-08-06 18:39:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:24,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:24,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:24,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:24,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:24,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:24,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:24,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213263768] [2021-08-06 18:39:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213263768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:24,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221785864] [2021-08-06 18:39:24,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:39:24,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:24,311 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:24,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 18:39:28,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:39:28,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:28,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:29,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:29,112 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:29,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:29,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:29,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:29,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:29,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221785864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:29,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:29,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:39:29,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127030096] [2021-08-06 18:39:29,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:39:29,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:29,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:39:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:39:29,726 INFO L87 Difference]: Start difference. First operand 2255 states and 2901 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:30,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:30,469 INFO L93 Difference]: Finished difference Result 4304 states and 5404 transitions. [2021-08-06 18:39:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 18:39:30,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:30,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:30,474 INFO L225 Difference]: With dead ends: 4304 [2021-08-06 18:39:30,474 INFO L226 Difference]: Without dead ends: 4224 [2021-08-06 18:39:30,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 801.7ms TimeCoverageRelationStatistics Valid=611, Invalid=1839, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 18:39:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2021-08-06 18:39:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 2245. [2021-08-06 18:39:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2234 states have (on average 1.2887197851387646) internal successors, (2879), 2244 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states 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 18:39:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 2879 transitions. [2021-08-06 18:39:30,496 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 2879 transitions. Word has length 72 [2021-08-06 18:39:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:30,497 INFO L470 AbstractCegarLoop]: Abstraction has 2245 states and 2879 transitions. [2021-08-06 18:39:30,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 2879 transitions. [2021-08-06 18:39:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:30,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:30,498 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2021-08-06 18:39:30,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 18:39:30,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-06 18:39:30,699 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash -210980526, now seen corresponding path program 72 times [2021-08-06 18:39:30,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:30,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631969652] [2021-08-06 18:39:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:30,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:30,742 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:30,743 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:30,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:30,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:30,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:30,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631969652] [2021-08-06 18:39:30,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631969652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:30,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092434746] [2021-08-06 18:39:30,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:39:30,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:30,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:30,859 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:30,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 18:39:35,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 18:39:35,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:35,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:35,678 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:36,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:36,251 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:36,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:36,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:36,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092434746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:36,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:36,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:39:36,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991242600] [2021-08-06 18:39:36,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:39:36,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:36,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:39:36,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:39:36,263 INFO L87 Difference]: Start difference. First operand 2245 states and 2879 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:36,972 INFO L93 Difference]: Finished difference Result 4496 states and 5628 transitions. [2021-08-06 18:39:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 18:39:36,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:36,983 INFO L225 Difference]: With dead ends: 4496 [2021-08-06 18:39:36,983 INFO L226 Difference]: Without dead ends: 4416 [2021-08-06 18:39:36,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 758.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 18:39:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4416 states. [2021-08-06 18:39:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4416 to 2329. [2021-08-06 18:39:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2318 states have (on average 1.2868852459016393) internal successors, (2983), 2328 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states 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 18:39:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 2983 transitions. [2021-08-06 18:39:37,006 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 2983 transitions. Word has length 72 [2021-08-06 18:39:37,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:37,006 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 2983 transitions. [2021-08-06 18:39:37,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:37,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 2983 transitions. [2021-08-06 18:39:37,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:37,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:37,008 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:39:37,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:37,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 18:39:37,213 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash -551388732, now seen corresponding path program 73 times [2021-08-06 18:39:37,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:37,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653113021] [2021-08-06 18:39:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:37,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:37,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:37,255 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:37,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:37,337 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:37,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:37,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653113021] [2021-08-06 18:39:37,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653113021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:37,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449722688] [2021-08-06 18:39:37,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:39:37,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:37,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:37,361 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:37,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 18:39:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:42,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:42,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:42,256 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:42,871 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:42,872 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:42,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:42,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:42,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449722688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:42,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:42,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:39:42,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721149075] [2021-08-06 18:39:42,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:39:42,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:39:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:39:42,885 INFO L87 Difference]: Start difference. First operand 2329 states and 2983 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:43,577 INFO L93 Difference]: Finished difference Result 4401 states and 5523 transitions. [2021-08-06 18:39:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 18:39:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:43,582 INFO L225 Difference]: With dead ends: 4401 [2021-08-06 18:39:43,582 INFO L226 Difference]: Without dead ends: 4321 [2021-08-06 18:39:43,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 730.1ms TimeCoverageRelationStatistics Valid=647, Invalid=1803, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 18:39:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2021-08-06 18:39:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 2309. [2021-08-06 18:39:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2298 states have (on average 1.2893820713664055) internal successors, (2963), 2308 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states 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 18:39:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 2963 transitions. [2021-08-06 18:39:43,604 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 2963 transitions. Word has length 72 [2021-08-06 18:39:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:43,604 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 2963 transitions. [2021-08-06 18:39:43,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 2963 transitions. [2021-08-06 18:39:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:43,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:43,606 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:39:43,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:43,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 18:39:43,821 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1822921820, now seen corresponding path program 74 times [2021-08-06 18:39:43,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:43,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380516010] [2021-08-06 18:39:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:43,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:43,864 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:43,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:43,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:43,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:43,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:43,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380516010] [2021-08-06 18:39:43,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380516010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:43,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120616125] [2021-08-06 18:39:43,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:39:43,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:43,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:43,983 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:43,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 18:39:48,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:39:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:48,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:48,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:48,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:49,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:49,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:49,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:49,621 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:49,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120616125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:49,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:49,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:39:49,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775954112] [2021-08-06 18:39:49,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:39:49,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:39:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:39:49,626 INFO L87 Difference]: Start difference. First operand 2309 states and 2963 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:50,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:50,366 INFO L93 Difference]: Finished difference Result 4214 states and 5278 transitions. [2021-08-06 18:39:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 18:39:50,366 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:50,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:50,371 INFO L225 Difference]: With dead ends: 4214 [2021-08-06 18:39:50,371 INFO L226 Difference]: Without dead ends: 4134 [2021-08-06 18:39:50,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 794.6ms TimeCoverageRelationStatistics Valid=657, Invalid=1793, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 18:39:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-08-06 18:39:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 2284. [2021-08-06 18:39:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2273 states have (on average 1.289925208974923) internal successors, (2932), 2283 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states 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 18:39:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2932 transitions. [2021-08-06 18:39:50,391 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2932 transitions. Word has length 72 [2021-08-06 18:39:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:50,391 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 2932 transitions. [2021-08-06 18:39:50,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2932 transitions. [2021-08-06 18:39:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:50,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:50,393 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2021-08-06 18:39:50,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 18:39:50,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:50,594 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:50,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1383788562, now seen corresponding path program 75 times [2021-08-06 18:39:50,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:50,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746749799] [2021-08-06 18:39:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:50,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:50,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:50,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:50,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:50,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:50,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:50,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746749799] [2021-08-06 18:39:50,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746749799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:50,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468450499] [2021-08-06 18:39:50,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:39:50,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:50,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:50,755 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:50,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 18:39:55,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 18:39:55,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:55,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:55,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:56,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:56,420 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:56,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:56,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:56,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468450499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:56,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:56,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:39:56,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364484295] [2021-08-06 18:39:56,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:39:56,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:56,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:39:56,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:39:56,433 INFO L87 Difference]: Start difference. First operand 2284 states and 2932 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:57,310 INFO L93 Difference]: Finished difference Result 4636 states and 5800 transitions. [2021-08-06 18:39:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 18:39:57,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:57,315 INFO L225 Difference]: With dead ends: 4636 [2021-08-06 18:39:57,315 INFO L226 Difference]: Without dead ends: 4556 [2021-08-06 18:39:57,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 904.3ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 18:39:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4556 states. [2021-08-06 18:39:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4556 to 2279. [2021-08-06 18:39:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2268 states have (on average 1.2879188712522045) internal successors, (2921), 2278 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states 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 18:39:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 2921 transitions. [2021-08-06 18:39:57,337 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 2921 transitions. Word has length 72 [2021-08-06 18:39:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:57,337 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 2921 transitions. [2021-08-06 18:39:57,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 2921 transitions. [2021-08-06 18:39:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:57,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:57,339 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:39:57,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 18:39:57,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:57,540 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:57,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1722023686, now seen corresponding path program 76 times [2021-08-06 18:39:57,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:57,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144073537] [2021-08-06 18:39:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:57,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:57,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:57,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:57,681 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:57,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:39:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:57,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:57,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144073537] [2021-08-06 18:39:57,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144073537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:57,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385158699] [2021-08-06 18:39:57,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:39:57,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:57,709 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:57,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 18:40:02,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:40:02,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:02,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:02,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:02,790 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:03,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:03,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:03,409 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:03,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:03,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385158699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:03,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:03,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:40:03,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905115888] [2021-08-06 18:40:03,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:40:03,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:03,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:40:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:40:03,414 INFO L87 Difference]: Start difference. First operand 2279 states and 2921 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:04,309 INFO L93 Difference]: Finished difference Result 4586 states and 5754 transitions. [2021-08-06 18:40:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 18:40:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:04,313 INFO L225 Difference]: With dead ends: 4586 [2021-08-06 18:40:04,313 INFO L226 Difference]: Without dead ends: 4506 [2021-08-06 18:40:04,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 922.8ms TimeCoverageRelationStatistics Valid=826, Invalid=2254, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 18:40:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-08-06 18:40:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2332. [2021-08-06 18:40:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2321 states have (on average 1.2916846186988367) internal successors, (2998), 2331 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states 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 18:40:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2998 transitions. [2021-08-06 18:40:04,336 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2998 transitions. Word has length 72 [2021-08-06 18:40:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:04,336 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 2998 transitions. [2021-08-06 18:40:04,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2998 transitions. [2021-08-06 18:40:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:04,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:04,338 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:40:04,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 18:40:04,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-06 18:40:04,539 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1931795974, now seen corresponding path program 77 times [2021-08-06 18:40:04,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:04,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267240109] [2021-08-06 18:40:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:04,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:04,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:04,584 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:04,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:04,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:04,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:04,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267240109] [2021-08-06 18:40:04,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267240109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:04,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337524893] [2021-08-06 18:40:04,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:40:04,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:04,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:04,710 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:04,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 18:40:09,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:40:09,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:09,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:09,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:09,871 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:09,872 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:10,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:10,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:10,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:10,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:10,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337524893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:10,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:10,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:40:10,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775917394] [2021-08-06 18:40:10,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:40:10,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:40:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:40:10,480 INFO L87 Difference]: Start difference. First operand 2332 states and 2998 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:11,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:11,322 INFO L93 Difference]: Finished difference Result 4504 states and 5660 transitions. [2021-08-06 18:40:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 18:40:11,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:11,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:11,327 INFO L225 Difference]: With dead ends: 4504 [2021-08-06 18:40:11,327 INFO L226 Difference]: Without dead ends: 4424 [2021-08-06 18:40:11,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 889.7ms TimeCoverageRelationStatistics Valid=777, Invalid=2193, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 18:40:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-08-06 18:40:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 2334. [2021-08-06 18:40:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2323 states have (on average 1.2927249246663797) internal successors, (3003), 2333 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states 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 18:40:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3003 transitions. [2021-08-06 18:40:11,348 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3003 transitions. Word has length 72 [2021-08-06 18:40:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:11,348 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3003 transitions. [2021-08-06 18:40:11,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3003 transitions. [2021-08-06 18:40:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:11,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:11,350 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:40:11,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 18:40:11,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 18:40:11,550 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2024936198, now seen corresponding path program 78 times [2021-08-06 18:40:11,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:11,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854896152] [2021-08-06 18:40:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:11,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:11,630 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:11,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:11,719 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:11,719 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:11,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:11,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854896152] [2021-08-06 18:40:11,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854896152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:11,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257691916] [2021-08-06 18:40:11,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:40:11,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:11,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:11,746 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:11,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 18:40:16,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:40:16,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:16,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:16,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:16,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:16,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:17,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:17,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:17,572 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:17,572 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:17,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257691916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:17,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:17,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:40:17,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786754100] [2021-08-06 18:40:17,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:40:17,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:17,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:40:17,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:40:17,577 INFO L87 Difference]: Start difference. First operand 2334 states and 3003 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:18,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:18,407 INFO L93 Difference]: Finished difference Result 4339 states and 5457 transitions. [2021-08-06 18:40:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 18:40:18,408 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:18,412 INFO L225 Difference]: With dead ends: 4339 [2021-08-06 18:40:18,412 INFO L226 Difference]: Without dead ends: 4259 [2021-08-06 18:40:18,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 867.3ms TimeCoverageRelationStatistics Valid=748, Invalid=2008, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 18:40:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2021-08-06 18:40:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 2314. [2021-08-06 18:40:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2303 states have (on average 1.2900564481111594) internal successors, (2971), 2313 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states 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 18:40:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2971 transitions. [2021-08-06 18:40:18,433 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2971 transitions. Word has length 72 [2021-08-06 18:40:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:18,433 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 2971 transitions. [2021-08-06 18:40:18,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2971 transitions. [2021-08-06 18:40:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:18,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:18,435 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:40:18,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 18:40:18,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:18,636 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:18,636 INFO L82 PathProgramCache]: Analyzing trace with hash -856853756, now seen corresponding path program 79 times [2021-08-06 18:40:18,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:18,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111099089] [2021-08-06 18:40:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:18,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:18,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:18,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:18,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:18,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:18,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:18,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111099089] [2021-08-06 18:40:18,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111099089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:18,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33942420] [2021-08-06 18:40:18,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:40:18,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:18,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:18,840 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:18,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 18:40:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:24,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:24,119 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:24,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:24,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:24,675 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:24,675 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:24,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33942420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:24,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:24,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:40:24,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621416994] [2021-08-06 18:40:24,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:40:24,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:40:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:40:24,680 INFO L87 Difference]: Start difference. First operand 2314 states and 2971 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:25,453 INFO L93 Difference]: Finished difference Result 4473 states and 5603 transitions. [2021-08-06 18:40:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 18:40:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:25,458 INFO L225 Difference]: With dead ends: 4473 [2021-08-06 18:40:25,458 INFO L226 Difference]: Without dead ends: 4393 [2021-08-06 18:40:25,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 824.5ms TimeCoverageRelationStatistics Valid=838, Invalid=2354, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 18:40:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-08-06 18:40:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 2399. [2021-08-06 18:40:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 2388 states have (on average 1.2922948073701843) internal successors, (3086), 2398 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states 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 18:40:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3086 transitions. [2021-08-06 18:40:25,478 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3086 transitions. Word has length 72 [2021-08-06 18:40:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:25,478 INFO L470 AbstractCegarLoop]: Abstraction has 2399 states and 3086 transitions. [2021-08-06 18:40:25,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3086 transitions. [2021-08-06 18:40:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:25,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:25,480 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:40:25,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 18:40:25,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:25,681 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1517456796, now seen corresponding path program 80 times [2021-08-06 18:40:25,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:25,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077274480] [2021-08-06 18:40:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:25,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:25,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:25,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:25,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:25,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:25,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:25,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077274480] [2021-08-06 18:40:25,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077274480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:25,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488743845] [2021-08-06 18:40:25,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:40:25,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:25,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:25,873 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:25,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 18:40:30,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:40:30,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:30,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:30,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:31,137 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:31,138 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:31,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:31,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:31,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:31,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:31,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488743845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:31,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:31,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:40:31,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347836513] [2021-08-06 18:40:31,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:40:31,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:31,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:40:31,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:40:31,727 INFO L87 Difference]: Start difference. First operand 2399 states and 3086 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:32,493 INFO L93 Difference]: Finished difference Result 4509 states and 5643 transitions. [2021-08-06 18:40:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 18:40:32,493 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:32,497 INFO L225 Difference]: With dead ends: 4509 [2021-08-06 18:40:32,497 INFO L226 Difference]: Without dead ends: 4429 [2021-08-06 18:40:32,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 846.6ms TimeCoverageRelationStatistics Valid=787, Invalid=2183, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 18:40:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-08-06 18:40:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 2412. [2021-08-06 18:40:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2401 states have (on average 1.2932111620158266) internal successors, (3105), 2411 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states 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 18:40:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3105 transitions. [2021-08-06 18:40:32,520 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3105 transitions. Word has length 72 [2021-08-06 18:40:32,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:32,520 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 3105 transitions. [2021-08-06 18:40:32,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:32,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3105 transitions. [2021-08-06 18:40:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:32,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:32,522 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:40:32,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 18:40:32,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-06 18:40:32,725 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:32,725 INFO L82 PathProgramCache]: Analyzing trace with hash -647081468, now seen corresponding path program 81 times [2021-08-06 18:40:32,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:32,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814394330] [2021-08-06 18:40:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:32,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:32,769 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:32,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:32,860 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:32,861 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:32,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:32,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814394330] [2021-08-06 18:40:32,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814394330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:32,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368856557] [2021-08-06 18:40:32,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:40:32,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:32,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:32,887 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:32,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 18:40:38,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:40:38,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:38,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:38,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:38,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:38,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:38,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:38,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:38,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:38,788 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:38,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368856557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:38,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:38,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:40:38,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820746755] [2021-08-06 18:40:38,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:40:38,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:38,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:40:38,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:40:38,792 INFO L87 Difference]: Start difference. First operand 2412 states and 3105 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:39,513 INFO L93 Difference]: Finished difference Result 4529 states and 5663 transitions. [2021-08-06 18:40:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 18:40:39,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:39,518 INFO L225 Difference]: With dead ends: 4529 [2021-08-06 18:40:39,518 INFO L226 Difference]: Without dead ends: 4449 [2021-08-06 18:40:39,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 743.6ms TimeCoverageRelationStatistics Valid=771, Invalid=2199, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 18:40:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4449 states. [2021-08-06 18:40:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4449 to 2412. [2021-08-06 18:40:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2401 states have (on average 1.2932111620158266) internal successors, (3105), 2411 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states 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 18:40:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3105 transitions. [2021-08-06 18:40:39,539 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3105 transitions. Word has length 72 [2021-08-06 18:40:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:39,540 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 3105 transitions. [2021-08-06 18:40:39,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3105 transitions. [2021-08-06 18:40:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:39,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:39,541 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:40:39,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:39,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 18:40:39,742 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:39,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:39,742 INFO L82 PathProgramCache]: Analyzing trace with hash -308846344, now seen corresponding path program 82 times [2021-08-06 18:40:39,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:39,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878816618] [2021-08-06 18:40:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:39,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:39,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:39,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:39,909 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:39,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:39,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:39,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878816618] [2021-08-06 18:40:39,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878816618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:39,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109375302] [2021-08-06 18:40:39,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:40:39,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:39,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:39,938 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:39,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 18:40:45,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:40:45,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:45,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:45,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:45,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:45,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:45,910 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:45,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:45,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109375302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:45,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:45,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:40:45,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397131990] [2021-08-06 18:40:45,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:40:45,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:45,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:40:45,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:40:45,915 INFO L87 Difference]: Start difference. First operand 2412 states and 3105 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:46,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:46,558 INFO L93 Difference]: Finished difference Result 4269 states and 5363 transitions. [2021-08-06 18:40:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 18:40:46,559 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:46,563 INFO L225 Difference]: With dead ends: 4269 [2021-08-06 18:40:46,563 INFO L226 Difference]: Without dead ends: 4189 [2021-08-06 18:40:46,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=694, Invalid=1958, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 18:40:46,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-08-06 18:40:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 2387. [2021-08-06 18:40:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2376 states have (on average 1.2937710437710437) internal successors, (3074), 2386 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states 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 18:40:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 3074 transitions. [2021-08-06 18:40:46,585 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 3074 transitions. Word has length 72 [2021-08-06 18:40:46,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:46,585 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 3074 transitions. [2021-08-06 18:40:46,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 3074 transitions. [2021-08-06 18:40:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:46,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:46,587 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:40:46,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 18:40:46,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 18:40:46,790 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:46,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:46,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1160897136, now seen corresponding path program 83 times [2021-08-06 18:40:46,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:46,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690906791] [2021-08-06 18:40:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:46,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:46,834 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:46,835 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:46,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:46,923 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:46,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:46,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690906791] [2021-08-06 18:40:46,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690906791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:46,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186024262] [2021-08-06 18:40:46,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:40:46,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:46,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:46,949 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:46,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 18:40:52,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:40:52,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:52,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:52,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:52,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:52,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:53,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:53,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:53,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:53,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:53,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186024262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:53,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:53,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:40:53,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818022174] [2021-08-06 18:40:53,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:40:53,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:40:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:40:53,064 INFO L87 Difference]: Start difference. First operand 2387 states and 3074 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:53,880 INFO L93 Difference]: Finished difference Result 4548 states and 5688 transitions. [2021-08-06 18:40:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 18:40:53,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:53,885 INFO L225 Difference]: With dead ends: 4548 [2021-08-06 18:40:53,886 INFO L226 Difference]: Without dead ends: 4468 [2021-08-06 18:40:53,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 851.7ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 18:40:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4468 states. [2021-08-06 18:40:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 2352. [2021-08-06 18:40:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2341 states have (on average 1.290474156343443) internal successors, (3021), 2351 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states 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 18:40:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 3021 transitions. [2021-08-06 18:40:53,910 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 3021 transitions. Word has length 72 [2021-08-06 18:40:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:53,910 INFO L470 AbstractCegarLoop]: Abstraction has 2352 states and 3021 transitions. [2021-08-06 18:40:53,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:53,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 3021 transitions. [2021-08-06 18:40:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:53,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:53,912 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:40:53,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 18:40:54,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:54,113 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:54,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1761420828, now seen corresponding path program 84 times [2021-08-06 18:40:54,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:54,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750270686] [2021-08-06 18:40:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:54,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:54,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:54,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:54,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:54,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:40:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:54,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:54,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750270686] [2021-08-06 18:40:54,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750270686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:54,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085844818] [2021-08-06 18:40:54,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:40:54,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:54,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:54,279 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:54,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 18:40:59,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:40:59,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:59,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:59,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:59,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:59,840 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:00,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:00,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:00,409 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:00,410 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:00,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085844818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:00,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:00,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:41:00,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897052131] [2021-08-06 18:41:00,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:41:00,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:41:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:41:00,414 INFO L87 Difference]: Start difference. First operand 2352 states and 3021 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:00,987 INFO L93 Difference]: Finished difference Result 4189 states and 5243 transitions. [2021-08-06 18:41:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:41:00,987 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:00,991 INFO L225 Difference]: With dead ends: 4189 [2021-08-06 18:41:00,991 INFO L226 Difference]: Without dead ends: 4109 [2021-08-06 18:41:00,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 648.1ms TimeCoverageRelationStatistics Valid=564, Invalid=1692, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:41:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-08-06 18:41:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 2347. [2021-08-06 18:41:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2336 states have (on average 1.288527397260274) internal successors, (3010), 2346 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states 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 18:41:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3010 transitions. [2021-08-06 18:41:01,012 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3010 transitions. Word has length 72 [2021-08-06 18:41:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:01,012 INFO L470 AbstractCegarLoop]: Abstraction has 2347 states and 3010 transitions. [2021-08-06 18:41:01,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3010 transitions. [2021-08-06 18:41:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:01,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:01,014 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 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] [2021-08-06 18:41:01,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:01,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 18:41:01,222 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:01,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1032053334, now seen corresponding path program 5 times [2021-08-06 18:41:01,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:01,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581546733] [2021-08-06 18:41:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:01,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:01,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:01,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:01,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:01,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:01,356 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:01,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:01,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:01,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581546733] [2021-08-06 18:41:01,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581546733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:01,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72631641] [2021-08-06 18:41:01,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:41:01,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:01,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:01,383 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:01,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 18:41:06,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 18:41:06,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:06,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:06,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:07,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:07,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:07,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:07,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:07,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72631641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:07,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:07,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:41:07,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211841375] [2021-08-06 18:41:07,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:41:07,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:41:07,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:41:07,607 INFO L87 Difference]: Start difference. First operand 2347 states and 3010 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:08,243 INFO L93 Difference]: Finished difference Result 4160 states and 5221 transitions. [2021-08-06 18:41:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 18:41:08,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:08,247 INFO L225 Difference]: With dead ends: 4160 [2021-08-06 18:41:08,247 INFO L226 Difference]: Without dead ends: 3920 [2021-08-06 18:41:08,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 711.1ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 18:41:08,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2021-08-06 18:41:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 2479. [2021-08-06 18:41:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2468 states have (on average 1.28322528363047) internal successors, (3167), 2478 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states 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 18:41:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3167 transitions. [2021-08-06 18:41:08,267 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3167 transitions. Word has length 72 [2021-08-06 18:41:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:08,268 INFO L470 AbstractCegarLoop]: Abstraction has 2479 states and 3167 transitions. [2021-08-06 18:41:08,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3167 transitions. [2021-08-06 18:41:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:08,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:08,269 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:41:08,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 18:41:08,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 18:41:08,470 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:08,470 INFO L82 PathProgramCache]: Analyzing trace with hash -212133162, now seen corresponding path program 85 times [2021-08-06 18:41:08,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:08,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110068174] [2021-08-06 18:41:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:08,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:08,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:08,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:08,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:08,528 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:08,602 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:08,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:08,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:08,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110068174] [2021-08-06 18:41:08,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110068174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:08,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485389215] [2021-08-06 18:41:08,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:41:08,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:08,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:08,628 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:08,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 18:41:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:14,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:14,300 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:14,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:14,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:14,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:14,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:14,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485389215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:14,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:14,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:41:14,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888801862] [2021-08-06 18:41:14,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:41:14,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:14,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:41:14,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:41:14,853 INFO L87 Difference]: Start difference. First operand 2479 states and 3167 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:15,425 INFO L93 Difference]: Finished difference Result 4558 states and 5680 transitions. [2021-08-06 18:41:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:41:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:15,429 INFO L225 Difference]: With dead ends: 4558 [2021-08-06 18:41:15,429 INFO L226 Difference]: Without dead ends: 4478 [2021-08-06 18:41:15,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 617.7ms TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 18:41:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2021-08-06 18:41:15,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 2459. [2021-08-06 18:41:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2448 states have (on average 1.2855392156862746) internal successors, (3147), 2458 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states 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 18:41:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 3147 transitions. [2021-08-06 18:41:15,449 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 3147 transitions. Word has length 72 [2021-08-06 18:41:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:15,449 INFO L470 AbstractCegarLoop]: Abstraction has 2459 states and 3147 transitions. [2021-08-06 18:41:15,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 3147 transitions. [2021-08-06 18:41:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:15,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:15,451 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:41:15,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:15,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-06 18:41:15,652 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2360874, now seen corresponding path program 86 times [2021-08-06 18:41:15,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:15,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400803420] [2021-08-06 18:41:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:15,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:15,697 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:15,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:15,707 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:15,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:15,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:15,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:15,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:15,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400803420] [2021-08-06 18:41:15,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400803420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:15,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923240036] [2021-08-06 18:41:15,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:41:15,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:15,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:15,807 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:15,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 18:41:21,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:41:21,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:21,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:21,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:21,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:21,557 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:22,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:22,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:22,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:22,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:22,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923240036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:22,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:22,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:41:22,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819340257] [2021-08-06 18:41:22,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:41:22,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:22,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:41:22,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:41:22,146 INFO L87 Difference]: Start difference. First operand 2459 states and 3147 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:22,801 INFO L93 Difference]: Finished difference Result 4664 states and 5806 transitions. [2021-08-06 18:41:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 18:41:22,802 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:22,806 INFO L225 Difference]: With dead ends: 4664 [2021-08-06 18:41:22,807 INFO L226 Difference]: Without dead ends: 4584 [2021-08-06 18:41:22,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:41:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2021-08-06 18:41:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 2434. [2021-08-06 18:41:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2423 states have (on average 1.2860090796533223) internal successors, (3116), 2433 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states 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 18:41:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3116 transitions. [2021-08-06 18:41:22,828 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3116 transitions. Word has length 72 [2021-08-06 18:41:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:22,828 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 3116 transitions. [2021-08-06 18:41:22,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3116 transitions. [2021-08-06 18:41:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:22,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:22,830 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2021-08-06 18:41:22,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:23,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 18:41:23,030 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash 728009954, now seen corresponding path program 87 times [2021-08-06 18:41:23,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:23,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674547305] [2021-08-06 18:41:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:23,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:23,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:23,117 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:23,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:23,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:23,202 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:23,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:23,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:23,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674547305] [2021-08-06 18:41:23,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674547305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:23,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830043369] [2021-08-06 18:41:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:41:23,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:23,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:23,228 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:23,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 18:41:28,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:41:28,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:28,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:29,026 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:29,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:29,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:29,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:29,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:29,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:29,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830043369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:29,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:29,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:41:29,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972094440] [2021-08-06 18:41:29,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:41:29,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:41:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:41:29,592 INFO L87 Difference]: Start difference. First operand 2434 states and 3116 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:30,250 INFO L93 Difference]: Finished difference Result 4709 states and 5857 transitions. [2021-08-06 18:41:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 18:41:30,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:30,255 INFO L225 Difference]: With dead ends: 4709 [2021-08-06 18:41:30,255 INFO L226 Difference]: Without dead ends: 4629 [2021-08-06 18:41:30,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 685.1ms TimeCoverageRelationStatistics Valid=723, Invalid=2033, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 18:41:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2021-08-06 18:41:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 2449. [2021-08-06 18:41:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 2438 states have (on average 1.281788351107465) internal successors, (3125), 2448 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states 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 18:41:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3125 transitions. [2021-08-06 18:41:30,290 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3125 transitions. Word has length 72 [2021-08-06 18:41:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:30,291 INFO L470 AbstractCegarLoop]: Abstraction has 2449 states and 3125 transitions. [2021-08-06 18:41:30,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3125 transitions. [2021-08-06 18:41:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:30,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:30,292 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:41:30,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:30,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:30,493 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:30,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1066245078, now seen corresponding path program 88 times [2021-08-06 18:41:30,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:30,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685482519] [2021-08-06 18:41:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:30,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:30,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:30,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:30,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:30,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:30,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:30,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:30,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:30,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685482519] [2021-08-06 18:41:30,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685482519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:30,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904618990] [2021-08-06 18:41:30,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:41:30,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:30,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:30,661 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:30,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 18:41:36,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:41:36,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:36,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:36,526 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:36,527 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:37,062 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:37,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:37,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:37,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:37,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904618990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:37,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:37,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:41:37,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794347907] [2021-08-06 18:41:37,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:41:37,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:41:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:41:37,076 INFO L87 Difference]: Start difference. First operand 2449 states and 3125 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:37,787 INFO L93 Difference]: Finished difference Result 4709 states and 5873 transitions. [2021-08-06 18:41:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 18:41:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:37,792 INFO L225 Difference]: With dead ends: 4709 [2021-08-06 18:41:37,792 INFO L226 Difference]: Without dead ends: 4629 [2021-08-06 18:41:37,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 732.9ms TimeCoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 18:41:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2021-08-06 18:41:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 2459. [2021-08-06 18:41:37,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2448 states have (on average 1.2855392156862746) internal successors, (3147), 2458 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states 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 18:41:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 3147 transitions. [2021-08-06 18:41:37,813 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 3147 transitions. Word has length 72 [2021-08-06 18:41:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:37,813 INFO L470 AbstractCegarLoop]: Abstraction has 2459 states and 3147 transitions. [2021-08-06 18:41:37,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 3147 transitions. [2021-08-06 18:41:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:37,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:37,815 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:41:37,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:38,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:38,016 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1276017366, now seen corresponding path program 89 times [2021-08-06 18:41:38,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:38,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056001668] [2021-08-06 18:41:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:38,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:38,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:38,062 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:38,072 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:38,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:38,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:38,147 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:38,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:38,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056001668] [2021-08-06 18:41:38,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056001668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:38,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423485898] [2021-08-06 18:41:38,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:41:38,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:38,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:38,173 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:38,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 18:41:43,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:41:43,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:43,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:44,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:44,097 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:44,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:44,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:44,658 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:44,658 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:44,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423485898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:44,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:44,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:41:44,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067164454] [2021-08-06 18:41:44,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:41:44,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:44,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:41:44,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:41:44,663 INFO L87 Difference]: Start difference. First operand 2459 states and 3147 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:45,366 INFO L93 Difference]: Finished difference Result 4743 states and 5903 transitions. [2021-08-06 18:41:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 18:41:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:45,371 INFO L225 Difference]: With dead ends: 4743 [2021-08-06 18:41:45,371 INFO L226 Difference]: Without dead ends: 4663 [2021-08-06 18:41:45,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=706, Invalid=2050, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 18:41:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4663 states. [2021-08-06 18:41:45,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4663 to 2464. [2021-08-06 18:41:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2453 states have (on average 1.2874031797798613) internal successors, (3158), 2463 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states 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 18:41:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 3158 transitions. [2021-08-06 18:41:45,393 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 3158 transitions. Word has length 72 [2021-08-06 18:41:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:45,393 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 3158 transitions. [2021-08-06 18:41:45,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 3158 transitions. [2021-08-06 18:41:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:45,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:45,395 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:41:45,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:45,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:45,596 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:45,596 INFO L82 PathProgramCache]: Analyzing trace with hash 31830870, now seen corresponding path program 90 times [2021-08-06 18:41:45,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:45,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483769145] [2021-08-06 18:41:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:45,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:45,643 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:45,644 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:45,654 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:45,655 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:45,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:45,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:45,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:45,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483769145] [2021-08-06 18:41:45,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483769145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:45,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163921696] [2021-08-06 18:41:45,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:41:45,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:45,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:45,756 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:45,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 18:41:51,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:41:51,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:51,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:51,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:51,758 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:51,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:52,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:52,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:52,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:52,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:52,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163921696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:52,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:52,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:41:52,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026685904] [2021-08-06 18:41:52,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:41:52,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:52,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:41:52,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:41:52,292 INFO L87 Difference]: Start difference. First operand 2464 states and 3158 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:52,835 INFO L93 Difference]: Finished difference Result 4415 states and 5511 transitions. [2021-08-06 18:41:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 18:41:52,835 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:52,840 INFO L225 Difference]: With dead ends: 4415 [2021-08-06 18:41:52,840 INFO L226 Difference]: Without dead ends: 4335 [2021-08-06 18:41:52,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 586.8ms TimeCoverageRelationStatistics Valid=569, Invalid=1687, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:41:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-08-06 18:41:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2444. [2021-08-06 18:41:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2433 states have (on average 1.2897657213316893) internal successors, (3138), 2443 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states 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 18:41:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 3138 transitions. [2021-08-06 18:41:52,861 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 3138 transitions. Word has length 72 [2021-08-06 18:41:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:52,861 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 3138 transitions. [2021-08-06 18:41:52,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 3138 transitions. [2021-08-06 18:41:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:52,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:52,863 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:41:52,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 18:41:53,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:53,064 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:53,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1204082742, now seen corresponding path program 91 times [2021-08-06 18:41:53,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:53,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366586781] [2021-08-06 18:41:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:53,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:53,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:53,157 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:53,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:53,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:53,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:53,242 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:41:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:53,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:53,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366586781] [2021-08-06 18:41:53,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366586781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:53,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413953489] [2021-08-06 18:41:53,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:41:53,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:53,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:53,268 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:53,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 18:41:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:59,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:59,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:59,260 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:59,856 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:59,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:59,864 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:59,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:59,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413953489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:59,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:59,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:41:59,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735539995] [2021-08-06 18:41:59,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:41:59,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:41:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:41:59,869 INFO L87 Difference]: Start difference. First operand 2444 states and 3138 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:00,554 INFO L93 Difference]: Finished difference Result 4503 states and 5615 transitions. [2021-08-06 18:42:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:42:00,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:00,559 INFO L225 Difference]: With dead ends: 4503 [2021-08-06 18:42:00,559 INFO L226 Difference]: Without dead ends: 4423 [2021-08-06 18:42:00,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 724.3ms TimeCoverageRelationStatistics Valid=570, Invalid=1686, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:42:00,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4423 states. [2021-08-06 18:42:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4423 to 2394. [2021-08-06 18:42:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2383 states have (on average 1.2908099034830045) internal successors, (3076), 2393 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states 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 18:42:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 3076 transitions. [2021-08-06 18:42:00,581 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 3076 transitions. Word has length 72 [2021-08-06 18:42:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:00,581 INFO L470 AbstractCegarLoop]: Abstraction has 2394 states and 3076 transitions. [2021-08-06 18:42:00,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 3076 transitions. [2021-08-06 18:42:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:00,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:00,583 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:42:00,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 18:42:00,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:00,785 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1846361246, now seen corresponding path program 92 times [2021-08-06 18:42:00,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:00,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498098941] [2021-08-06 18:42:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:00,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:00,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:42:00,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:42:00,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:42:00,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:42:00,917 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:42:00,917 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:42:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:00,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:00,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498098941] [2021-08-06 18:42:00,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498098941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:00,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609231166] [2021-08-06 18:42:00,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:42:00,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:00,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:00,943 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:00,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 18:42:06,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:42:06,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:06,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:07,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:07,083 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:07,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:07,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:07,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:07,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:07,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609231166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:07,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:07,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:42:07,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190827927] [2021-08-06 18:42:07,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:42:07,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:42:07,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:42:07,710 INFO L87 Difference]: Start difference. First operand 2394 states and 3076 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:08,279 INFO L93 Difference]: Finished difference Result 4288 states and 5342 transitions. [2021-08-06 18:42:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 18:42:08,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:08,284 INFO L225 Difference]: With dead ends: 4288 [2021-08-06 18:42:08,284 INFO L226 Difference]: Without dead ends: 4208 [2021-08-06 18:42:08,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 638.5ms TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 18:42:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-08-06 18:42:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 2369. [2021-08-06 18:42:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2358 states have (on average 1.2913486005089059) internal successors, (3045), 2368 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states 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 18:42:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 3045 transitions. [2021-08-06 18:42:08,304 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 3045 transitions. Word has length 72 [2021-08-06 18:42:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:08,304 INFO L470 AbstractCegarLoop]: Abstraction has 2369 states and 3045 transitions. [2021-08-06 18:42:08,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:08,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 3045 transitions. [2021-08-06 18:42:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:08,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:08,306 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:42:08,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 18:42:08,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 18:42:08,507 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:08,507 INFO L82 PathProgramCache]: Analyzing trace with hash 622302910, now seen corresponding path program 93 times [2021-08-06 18:42:08,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:08,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459937394] [2021-08-06 18:42:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:08,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:08,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:42:08,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:42:08,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:42:08,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:42:08,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:42:08,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:42:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:08,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:08,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459937394] [2021-08-06 18:42:08,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459937394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:08,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094112274] [2021-08-06 18:42:08,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:42:08,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:08,667 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:08,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 18:42:14,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 18:42:14,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:14,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:14,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:15,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:15,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:15,478 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:15,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:15,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094112274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:15,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:15,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 18:42:15,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398046898] [2021-08-06 18:42:15,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 18:42:15,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:15,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 18:42:15,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:42:15,483 INFO L87 Difference]: Start difference. First operand 2369 states and 3045 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:15,969 INFO L93 Difference]: Finished difference Result 4184 states and 5214 transitions. [2021-08-06 18:42:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:42:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:15,973 INFO L225 Difference]: With dead ends: 4184 [2021-08-06 18:42:15,973 INFO L226 Difference]: Without dead ends: 4104 [2021-08-06 18:42:15,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 18:42:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2021-08-06 18:42:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 2349. [2021-08-06 18:42:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2338 states have (on average 1.2835757057313943) internal successors, (3001), 2348 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states 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 18:42:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3001 transitions. [2021-08-06 18:42:15,993 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3001 transitions. Word has length 72 [2021-08-06 18:42:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:15,993 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 3001 transitions. [2021-08-06 18:42:15,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3001 transitions. [2021-08-06 18:42:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:15,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:15,995 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 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] [2021-08-06 18:42:16,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 18:42:16,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 18:42:16,195 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:16,195 INFO L82 PathProgramCache]: Analyzing trace with hash -139365381, now seen corresponding path program 4 times [2021-08-06 18:42:16,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:16,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841481646] [2021-08-06 18:42:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:16,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:16,280 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:42:16,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:42:16,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:16,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:16,295 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,335 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,336 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,347 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,348 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:16,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:42:16,361 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:42:16,376 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:42:16,376 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:42:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:16,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:16,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841481646] [2021-08-06 18:42:16,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841481646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:16,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382611371] [2021-08-06 18:42:16,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:42:16,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:16,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:16,400 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:16,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 18:42:22,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:42:22,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:23,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:23,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:23,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:23,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:23,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382611371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:23,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:23,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:23,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502806919] [2021-08-06 18:42:23,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:23,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:23,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:23,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:23,138 INFO L87 Difference]: Start difference. First operand 2349 states and 3001 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:23,421 INFO L93 Difference]: Finished difference Result 3268 states and 4089 transitions. [2021-08-06 18:42:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:42:23,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:23,424 INFO L225 Difference]: With dead ends: 3268 [2021-08-06 18:42:23,424 INFO L226 Difference]: Without dead ends: 3108 [2021-08-06 18:42:23,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=356, Invalid=1126, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 18:42:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2021-08-06 18:42:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2359. [2021-08-06 18:42:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2348 states have (on average 1.2874787052810903) internal successors, (3023), 2358 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states 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 18:42:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 3023 transitions. [2021-08-06 18:42:23,442 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 3023 transitions. Word has length 72 [2021-08-06 18:42:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:23,442 INFO L470 AbstractCegarLoop]: Abstraction has 2359 states and 3023 transitions. [2021-08-06 18:42:23,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 3023 transitions. [2021-08-06 18:42:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:23,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:23,444 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 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] [2021-08-06 18:42:23,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 18:42:23,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 18:42:23,645 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:23,645 INFO L82 PathProgramCache]: Analyzing trace with hash -319119368, now seen corresponding path program 17 times [2021-08-06 18:42:23,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:23,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745594845] [2021-08-06 18:42:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:23,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:23,771 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:42:23,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:42:23,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:42:23,785 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:42:23,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:23,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:23,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:23,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745594845] [2021-08-06 18:42:23,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745594845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:23,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34733951] [2021-08-06 18:42:23,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:42:23,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:23,824 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:23,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 18:42:29,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 18:42:29,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:29,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:30,693 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:30,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:30,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34733951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:30,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:30,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:30,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680036641] [2021-08-06 18:42:30,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:30,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:30,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:30,698 INFO L87 Difference]: Start difference. First operand 2359 states and 3023 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:30,933 INFO L93 Difference]: Finished difference Result 3711 states and 4647 transitions. [2021-08-06 18:42:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:42:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:30,937 INFO L225 Difference]: With dead ends: 3711 [2021-08-06 18:42:30,937 INFO L226 Difference]: Without dead ends: 3631 [2021-08-06 18:42:30,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 18:42:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-08-06 18:42:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2354. [2021-08-06 18:42:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2343 states have (on average 1.2855313700384123) internal successors, (3012), 2353 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 18:42:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 3012 transitions. [2021-08-06 18:42:30,955 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 3012 transitions. Word has length 72 [2021-08-06 18:42:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:30,956 INFO L470 AbstractCegarLoop]: Abstraction has 2354 states and 3012 transitions. [2021-08-06 18:42:30,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 3012 transitions. [2021-08-06 18:42:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:30,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:30,957 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 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] [2021-08-06 18:42:30,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 18:42:31,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:31,165 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1611121954, now seen corresponding path program 18 times [2021-08-06 18:42:31,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:31,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607245182] [2021-08-06 18:42:31,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:31,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:31,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:42:31,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:42:31,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:31,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:31,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:31,340 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:31,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:31,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607245182] [2021-08-06 18:42:31,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607245182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:31,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583442670] [2021-08-06 18:42:31,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:42:31,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:31,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:31,365 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:31,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 18:42:37,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 18:42:37,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 18:42:37,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:37,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:42:37,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:42:37,965 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:37,966 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:37,973 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:37,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:37,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583442670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:37,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:37,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-08-06 18:42:37,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035530985] [2021-08-06 18:42:37,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:42:37,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:42:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:42:37,979 INFO L87 Difference]: Start difference. First operand 2354 states and 3012 transitions. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 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 18:42:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:38,378 INFO L93 Difference]: Finished difference Result 5054 states and 6368 transitions. [2021-08-06 18:42:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 18:42:38,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 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 72 [2021-08-06 18:42:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:38,383 INFO L225 Difference]: With dead ends: 5054 [2021-08-06 18:42:38,383 INFO L226 Difference]: Without dead ends: 4814 [2021-08-06 18:42:38,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 18:42:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-08-06 18:42:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 2335. [2021-08-06 18:42:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2324 states have (on average 1.2870051635111877) internal successors, (2991), 2334 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states 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 18:42:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 2991 transitions. [2021-08-06 18:42:38,408 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 2991 transitions. Word has length 72 [2021-08-06 18:42:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:38,408 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 2991 transitions. [2021-08-06 18:42:38,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 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 18:42:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 2991 transitions. [2021-08-06 18:42:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:38,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:38,410 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2021-08-06 18:42:38,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 18:42:38,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:38,611 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:38,611 INFO L82 PathProgramCache]: Analyzing trace with hash -866138926, now seen corresponding path program 94 times [2021-08-06 18:42:38,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:38,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722736376] [2021-08-06 18:42:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:38,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:38,719 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:42:38,720 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:42:38,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:38,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:38,747 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:38,747 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:38,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:38,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722736376] [2021-08-06 18:42:38,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722736376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:38,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325471960] [2021-08-06 18:42:38,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:42:38,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:38,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:38,772 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:38,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 18:42:44,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:42:44,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:44,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:45,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:45,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:45,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325471960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:45,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:45,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:45,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850720090] [2021-08-06 18:42:45,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:45,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:45,646 INFO L87 Difference]: Start difference. First operand 2335 states and 2991 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:46,712 INFO L93 Difference]: Finished difference Result 5559 states and 7019 transitions. [2021-08-06 18:42:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 18:42:46,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:46,718 INFO L225 Difference]: With dead ends: 5559 [2021-08-06 18:42:46,718 INFO L226 Difference]: Without dead ends: 5319 [2021-08-06 18:42:46,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1089.2ms TimeCoverageRelationStatistics Valid=886, Invalid=3404, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 18:42:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2021-08-06 18:42:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 2320. [2021-08-06 18:42:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2309 states have (on average 1.2862711130359463) internal successors, (2970), 2319 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states 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 18:42:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 2970 transitions. [2021-08-06 18:42:46,744 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 2970 transitions. Word has length 72 [2021-08-06 18:42:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:46,744 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 2970 transitions. [2021-08-06 18:42:46,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 2970 transitions. [2021-08-06 18:42:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:46,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:46,746 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:42:46,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 18:42:46,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:46,946 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:46,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:46,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1368221646, now seen corresponding path program 95 times [2021-08-06 18:42:46,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:46,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475528719] [2021-08-06 18:42:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:46,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:47,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:42:47,055 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:42:47,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:47,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:47,081 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:47,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:47,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:47,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475528719] [2021-08-06 18:42:47,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475528719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:47,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799745591] [2021-08-06 18:42:47,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:42:47,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:47,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:47,105 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:47,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 18:42:53,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:42:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:53,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:53,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:54,000 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:54,001 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:54,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799745591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:54,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:54,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:54,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390287234] [2021-08-06 18:42:54,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:54,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:54,005 INFO L87 Difference]: Start difference. First operand 2320 states and 2970 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:55,411 INFO L93 Difference]: Finished difference Result 6361 states and 8005 transitions. [2021-08-06 18:42:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 18:42:55,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:55,416 INFO L225 Difference]: With dead ends: 6361 [2021-08-06 18:42:55,416 INFO L226 Difference]: Without dead ends: 6121 [2021-08-06 18:42:55,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 1368.7ms TimeCoverageRelationStatistics Valid=1187, Invalid=4513, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 18:42:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2021-08-06 18:42:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 2395. [2021-08-06 18:42:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2384 states have (on average 1.2898489932885906) internal successors, (3075), 2394 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states 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 18:42:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 3075 transitions. [2021-08-06 18:42:55,441 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 3075 transitions. Word has length 72 [2021-08-06 18:42:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:55,442 INFO L470 AbstractCegarLoop]: Abstraction has 2395 states and 3075 transitions. [2021-08-06 18:42:55,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 3075 transitions. [2021-08-06 18:42:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:55,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:55,443 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:42:55,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 18:42:55,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 18:42:55,645 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:55,645 INFO L82 PathProgramCache]: Analyzing trace with hash -243691250, now seen corresponding path program 96 times [2021-08-06 18:42:55,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:55,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806039657] [2021-08-06 18:42:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:55,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:55,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:55,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:55,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:55,754 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:55,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:55,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:55,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:55,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:55,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:55,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806039657] [2021-08-06 18:42:55,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806039657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:55,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340623665] [2021-08-06 18:42:55,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:42:55,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:55,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:55,809 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:55,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 18:43:02,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:43:02,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:43:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:43:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:02,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:02,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:02,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340623665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:02,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:02,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:43:02,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302244335] [2021-08-06 18:43:02,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:43:02,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:02,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:43:02,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:43:02,820 INFO L87 Difference]: Start difference. First operand 2395 states and 3075 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:04,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:04,589 INFO L93 Difference]: Finished difference Result 6378 states and 8024 transitions. [2021-08-06 18:43:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 18:43:04,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:43:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:04,594 INFO L225 Difference]: With dead ends: 6378 [2021-08-06 18:43:04,594 INFO L226 Difference]: Without dead ends: 6138 [2021-08-06 18:43:04,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1708.2ms TimeCoverageRelationStatistics Valid=1278, Invalid=4884, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 18:43:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6138 states. [2021-08-06 18:43:04,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6138 to 2335. [2021-08-06 18:43:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2324 states have (on average 1.2870051635111877) internal successors, (2991), 2334 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states 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 18:43:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 2991 transitions. [2021-08-06 18:43:04,619 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 2991 transitions. Word has length 72 [2021-08-06 18:43:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:04,620 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 2991 transitions. [2021-08-06 18:43:04,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 2991 transitions. [2021-08-06 18:43:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:43:04,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:04,621 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:43:04,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 18:43:04,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:04,825 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:43:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash 530203218, now seen corresponding path program 97 times [2021-08-06 18:43:04,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:04,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014103207] [2021-08-06 18:43:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:04,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:04,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:43:04,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:43:04,945 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:04,946 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:04,958 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:04,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:04,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:04,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014103207] [2021-08-06 18:43:04,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014103207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:04,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523536801] [2021-08-06 18:43:04,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:43:04,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:04,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:04,983 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:04,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 18:43:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:11,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:43:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:11,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:11,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:11,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523536801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:11,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:11,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:43:11,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353625123] [2021-08-06 18:43:11,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:43:11,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:43:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:43:11,987 INFO L87 Difference]: Start difference. First operand 2335 states and 2991 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:13,860 INFO L93 Difference]: Finished difference Result 6676 states and 8438 transitions. [2021-08-06 18:43:13,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 18:43:13,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:43:13,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:13,867 INFO L225 Difference]: With dead ends: 6676 [2021-08-06 18:43:13,867 INFO L226 Difference]: Without dead ends: 6436 [2021-08-06 18:43:13,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1806.1ms TimeCoverageRelationStatistics Valid=1624, Invalid=6032, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 18:43:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2021-08-06 18:43:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 2455. [2021-08-06 18:43:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2444 states have (on average 1.291734860883797) internal successors, (3157), 2454 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states 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 18:43:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3157 transitions. [2021-08-06 18:43:13,895 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3157 transitions. Word has length 72 [2021-08-06 18:43:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:13,895 INFO L470 AbstractCegarLoop]: Abstraction has 2455 states and 3157 transitions. [2021-08-06 18:43:13,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3157 transitions. [2021-08-06 18:43:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:43:13,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:13,897 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 18:43:13,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-06 18:43:14,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:14,097 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:43:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1081709678, now seen corresponding path program 98 times [2021-08-06 18:43:14,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:14,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003636162] [2021-08-06 18:43:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:14,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:14,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:43:14,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:43:14,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:43:14,207 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:43:14,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:14,220 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:14,232 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:14,233 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:14,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:14,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003636162] [2021-08-06 18:43:14,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003636162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:14,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157022671] [2021-08-06 18:43:14,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:43:14,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:14,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:14,258 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:14,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 18:43:20,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:43:20,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:43:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:43:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:23,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:23,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:23,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157022671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:23,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:23,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:43:23,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365879864] [2021-08-06 18:43:23,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:43:23,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:43:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=463, Unknown=1, NotChecked=0, Total=600 [2021-08-06 18:43:23,835 INFO L87 Difference]: Start difference. First operand 2455 states and 3157 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:28,431 INFO L93 Difference]: Finished difference Result 6798 states and 8600 transitions. [2021-08-06 18:44:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 18:44:28,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:44:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:28,438 INFO L225 Difference]: With dead ends: 6798 [2021-08-06 18:44:28,438 INFO L226 Difference]: Without dead ends: 6558 [2021-08-06 18:44:28,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 53611.7ms TimeCoverageRelationStatistics Valid=1393, Invalid=5235, Unknown=14, NotChecked=0, Total=6642 [2021-08-06 18:44:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2021-08-06 18:44:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 2380. [2021-08-06 18:44:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2369 states have (on average 1.293372731110173) internal successors, (3064), 2379 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states 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 18:44:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3064 transitions. [2021-08-06 18:44:28,466 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3064 transitions. Word has length 72 [2021-08-06 18:44:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:28,466 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 3064 transitions. [2021-08-06 18:44:28,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3064 transitions. [2021-08-06 18:44:28,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:44:28,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:28,468 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:44:28,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 18:44:28,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:28,669 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:28,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1250537824, now seen corresponding path program 99 times [2021-08-06 18:44:28,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:28,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001888012] [2021-08-06 18:44:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:28,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:28,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:44:28,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:44:28,794 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:28,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:28,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:28,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:28,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:28,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001888012] [2021-08-06 18:44:28,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001888012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:28,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745255525] [2021-08-06 18:44:28,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:44:28,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:28,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:28,835 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:28,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 18:44:35,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:44:35,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:44:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:36,048 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:36,048 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:36,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745255525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:36,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:36,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:44:36,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369265011] [2021-08-06 18:44:36,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:44:36,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:44:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:44:36,053 INFO L87 Difference]: Start difference. First operand 2380 states and 3064 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:37,849 INFO L93 Difference]: Finished difference Result 6436 states and 8158 transitions. [2021-08-06 18:44:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 18:44:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:44:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:37,855 INFO L225 Difference]: With dead ends: 6436 [2021-08-06 18:44:37,855 INFO L226 Difference]: Without dead ends: 6196 [2021-08-06 18:44:37,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 1710.0ms TimeCoverageRelationStatistics Valid=1502, Invalid=5638, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 18:44:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-08-06 18:44:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 2300. [2021-08-06 18:44:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2289 states have (on average 1.293141109654871) internal successors, (2960), 2299 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states 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 18:44:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 2960 transitions. [2021-08-06 18:44:37,884 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 2960 transitions. Word has length 72 [2021-08-06 18:44:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:37,884 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 2960 transitions. [2021-08-06 18:44:37,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 2960 transitions. [2021-08-06 18:44:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:44:37,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:37,885 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:44:37,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-06 18:44:38,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 18:44:38,086 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:38,086 INFO L82 PathProgramCache]: Analyzing trace with hash 449141326, now seen corresponding path program 100 times [2021-08-06 18:44:38,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:38,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856340112] [2021-08-06 18:44:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:38,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:38,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:44:38,197 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:44:38,210 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:38,211 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:38,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:38,224 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:38,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:38,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856340112] [2021-08-06 18:44:38,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856340112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:38,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728889772] [2021-08-06 18:44:38,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:44:38,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:38,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:38,249 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:38,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 18:44:44,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:44:44,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:44,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:44:44,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:45,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:45,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:45,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728889772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:45,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:45,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:44:45,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821580848] [2021-08-06 18:44:45,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:44:45,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:44:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:44:45,493 INFO L87 Difference]: Start difference. First operand 2300 states and 2960 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:47,720 INFO L93 Difference]: Finished difference Result 6610 states and 8366 transitions. [2021-08-06 18:44:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 18:44:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:44:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:47,727 INFO L225 Difference]: With dead ends: 6610 [2021-08-06 18:44:47,727 INFO L226 Difference]: Without dead ends: 6370 [2021-08-06 18:44:47,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 2080.1ms TimeCoverageRelationStatistics Valid=1798, Invalid=6574, Unknown=0, NotChecked=0, Total=8372 [2021-08-06 18:44:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6370 states. [2021-08-06 18:44:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6370 to 2615. [2021-08-06 18:44:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2604 states have (on average 1.2876344086021505) internal successors, (3353), 2614 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states 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 18:44:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3353 transitions. [2021-08-06 18:44:47,762 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3353 transitions. Word has length 72 [2021-08-06 18:44:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:47,762 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 3353 transitions. [2021-08-06 18:44:47,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3353 transitions. [2021-08-06 18:44:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:44:47,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:47,764 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-08-06 18:44:47,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 18:44:47,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 18:44:47,964 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:47,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1162771570, now seen corresponding path program 101 times [2021-08-06 18:44:47,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:47,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269027027] [2021-08-06 18:44:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:47,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:48,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:44:48,065 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:44:48,077 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:44:48,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:44:48,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:48,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:48,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:48,106 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:48,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:48,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269027027] [2021-08-06 18:44:48,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269027027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:48,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275895843] [2021-08-06 18:44:48,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:44:48,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:48,131 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:48,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 18:44:54,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:44:54,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:54,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:44:54,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:00,222 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:00,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:00,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275895843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:00,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:00,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:45:00,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299651269] [2021-08-06 18:45:00,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:45:00,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:00,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:45:00,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=467, Unknown=2, NotChecked=0, Total=600 [2021-08-06 18:45:00,228 INFO L87 Difference]: Start difference. First operand 2615 states and 3353 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-06 18:45:14,481 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 18:45:14,481 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 18:45:15,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:15,694 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-06 18:45:15,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2021-08-06 18:45:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:45:15,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-06 18:45:15,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-08-06 18:45:15,709 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (2615states) and FLOYD_HOARE automaton (currently 21 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. [2021-08-06 18:45:15,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 18:45:15,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 18:45:15,713 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 18:45:15,713 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 18:45:15,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 06:45:15 BasicIcfg [2021-08-06 18:45:15,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 18:45:15,714 INFO L168 Benchmark]: Toolchain (without parser) took 750267.18 ms. Allocated memory was 182.5 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 145.9 MB in the beginning and 806.7 MB in the end (delta: -660.8 MB). Peak memory consumption was 689.1 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:15,715 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 182.5 MB. Free memory is still 163.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 18:45:15,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.30 ms. Allocated memory is still 182.5 MB. Free memory was 145.8 MB in the beginning and 157.0 MB in the end (delta: -11.3 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:15,715 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.02 ms. Allocated memory is still 182.5 MB. Free memory was 157.0 MB in the beginning and 155.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:15,715 INFO L168 Benchmark]: Boogie Preprocessor took 26.59 ms. Allocated memory is still 182.5 MB. Free memory was 154.9 MB in the beginning and 153.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:15,715 INFO L168 Benchmark]: RCFGBuilder took 334.18 ms. Allocated memory is still 182.5 MB. Free memory was 153.6 MB in the beginning and 132.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:15,715 INFO L168 Benchmark]: TraceAbstraction took 749486.45 ms. Allocated memory was 182.5 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 131.9 MB in the beginning and 806.7 MB in the end (delta: -674.8 MB). Peak memory consumption was 675.8 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:15,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 182.5 MB. Free memory is still 163.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 369.30 ms. Allocated memory is still 182.5 MB. Free memory was 145.8 MB in the beginning and 157.0 MB in the end (delta: -11.3 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.02 ms. Allocated memory is still 182.5 MB. Free memory was 157.0 MB in the beginning and 155.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.59 ms. Allocated memory is still 182.5 MB. Free memory was 154.9 MB in the beginning and 153.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.18 ms. Allocated memory is still 182.5 MB. Free memory was 153.6 MB in the beginning and 132.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 749486.45 ms. Allocated memory was 182.5 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 131.9 MB in the beginning and 806.7 MB in the end (delta: -674.8 MB). Peak memory consumption was 675.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2298, positive: 1987, positive conditional: 1987, positive unconditional: 0, negative: 311, negative conditional: 311, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2007, positive: 1987, positive conditional: 0, positive unconditional: 1987, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 374, positive: 371, positive conditional: 0, positive unconditional: 371, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 374, positive: 371, positive conditional: 0, positive unconditional: 371, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 14, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2007, positive: 1616, positive conditional: 0, positive unconditional: 1616, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 374, unknown conditional: 0, unknown unconditional: 374] , Statistics on independence cache: Total cache size (in pairs): 374, Positive cache size: 371, Positive conditional cache size: 0, Positive unconditional cache size: 371, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 291 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 731]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (2615states) and FLOYD_HOARE automaton (currently 21 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 723]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2615states) and FLOYD_HOARE automaton (currently 21 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2615states) and FLOYD_HOARE automaton (currently 21 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 749405.3ms, OverallIterations: 136, TraceHistogramMax: 8, EmptinessCheckTime: 205.0ms, AutomataDifference: 204380.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 151.5ms, PartialOrderReductionTime: 141.7ms, HoareTripleCheckerStatistics: 10257 SDtfs, 100983 SDslu, 120911 SDs, 0 SdLazy, 23922 SolverSat, 10344 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 37730.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13581 GetRequests, 7373 SyntacticMatches, 40 SemanticMatches, 6167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107763 ImplicationChecksByTransitivity, 183413.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2615occurred in iteration=135, InterpolantAutomatonStates: 5001, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2456.3ms AutomataMinimizationTime, 135 MinimizatonAttempts, 226278 StatesRemovedByMinimization, 135 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1146.3ms SsaConstructionTime, 2767.7ms SatisfiabilityAnalysisTime, 117490.5ms InterpolantComputationTime, 17092 NumberOfCodeBlocks, 17092 NumberOfCodeBlocksAsserted, 519 NumberOfCheckSat, 16826 ConstructedInterpolants, 30 QuantifiedInterpolants, 150423 SizeOfPredicates, 260 NumberOfNonLiveVariables, 19814 ConjunctsInSsa, 1786 ConjunctsInUnsatCore, 266 InterpolantComputations, 6 PerfectInterpolantSequences, 0/9030 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown