/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 16:49:32,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 16:49:32,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 16:49:32,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-08 16:49:32,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-08 16:49:32,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-08 16:49:32,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-08 16:49:32,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-08 16:49:32,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-08 16:49:32,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-08 16:49:32,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-08 16:49:32,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-08 16:49:32,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 16:49:32,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 16:49:32,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 16:49:32,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 16:49:32,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 16:49:32,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 16:49:32,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 16:49:32,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 16:49:32,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 16:49:32,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 16:49:32,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 16:49:32,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 16:49:32,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-08 16:49:32,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 16:49:32,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 16:49:32,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 16:49:32,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 16:49:32,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 16:49:32,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 16:49:32,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 16:49:32,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 16:49:32,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 16:49:32,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 16:49:32,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 16:49:32,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 16:49:32,813 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 16:49:32,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 16:49:32,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 16:49:32,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 16:49:32,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 16:49:32,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 16:49:32,816 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 16:49:32,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 16:49:32,817 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 16:49:32,818 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 16:49:32,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 16:49:32,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 16:49:32,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 16:49:32,819 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 16:49:32,819 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 16:49:32,819 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 16:49:32,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 16:49:32,820 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 16:49:32,820 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 16:49:32,821 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 16:49:32,821 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 16:49:32,821 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 16:49:32,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 16:49:32,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 16:49:32,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 16:49:32,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 16:49:32,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 16:49:32,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 16:49:32,823 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 16:49:32,823 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 16:49:32,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 16:49:32,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 16:49:32,824 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 16:49:33,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 16:49:33,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 16:49:33,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 16:49:33,205 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 16:49:33,206 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 16:49:33,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2021-10-08 16:49:33,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/603187bcc/dc9675d677784c09bf2a7bdfa9d2c696/FLAG4a3ae6342 [2021-10-08 16:49:33,857 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 16:49:33,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2021-10-08 16:49:33,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/603187bcc/dc9675d677784c09bf2a7bdfa9d2c696/FLAG4a3ae6342 [2021-10-08 16:49:34,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/603187bcc/dc9675d677784c09bf2a7bdfa9d2c696 [2021-10-08 16:49:34,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 16:49:34,305 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 16:49:34,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 16:49:34,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 16:49:34,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 16:49:34,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b047e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34, skipping insertion in model container [2021-10-08 16:49:34,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 16:49:34,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 16:49:34,611 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3398,3411] [2021-10-08 16:49:34,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 16:49:34,651 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-08 16:49:34,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 16:49:34,676 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3398,3411] [2021-10-08 16:49:34,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 16:49:34,690 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 16:49:34,723 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3398,3411] [2021-10-08 16:49:34,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 16:49:34,756 INFO L208 MainTranslator]: Completed translation [2021-10-08 16:49:34,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34 WrapperNode [2021-10-08 16:49:34,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 16:49:34,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 16:49:34,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 16:49:34,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 16:49:34,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 16:49:34,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 16:49:34,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 16:49:34,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 16:49:34,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 16:49:34,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 16:49:34,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 16:49:34,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 16:49:34,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (1/1) ... [2021-10-08 16:49:34,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 16:49:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 16:49:34,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 16:49:34,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 16:49:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-08 16:49:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 16:49:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 16:49:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 16:49:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 16:49:35,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 16:49:35,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 16:49:35,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 16:49:35,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 16:49:35,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 16:49:35,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 16:49:35,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 16:49:35,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 16:49:35,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-08 16:49:35,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 16:49:35,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 16:49:35,037 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 16:49:40,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 16:49:40,814 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2021-10-08 16:49:40,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 04:49:40 BoogieIcfgContainer [2021-10-08 16:49:40,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 16:49:40,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 16:49:40,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 16:49:40,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 16:49:40,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 04:49:34" (1/3) ... [2021-10-08 16:49:40,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aed320b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 04:49:40, skipping insertion in model container [2021-10-08 16:49:40,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 04:49:34" (2/3) ... [2021-10-08 16:49:40,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aed320b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 04:49:40, skipping insertion in model container [2021-10-08 16:49:40,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 04:49:40" (3/3) ... [2021-10-08 16:49:40,827 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2021-10-08 16:49:40,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 16:49:40,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2021-10-08 16:49:40,833 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 16:49:40,894 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,894 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,895 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,895 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,895 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,897 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,897 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,897 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,897 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,898 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,898 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,898 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,898 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,899 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,899 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,900 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,900 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,900 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,901 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,901 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,902 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,902 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,902 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,903 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,904 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,904 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,905 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,905 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,905 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,905 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,905 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,906 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,906 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,906 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,906 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,906 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,907 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,907 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,907 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,907 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,908 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,908 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,908 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,909 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,909 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,909 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,910 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,910 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,910 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,910 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,910 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,911 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,913 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,913 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,914 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,914 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,915 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,917 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,917 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,917 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,917 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,918 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,918 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,918 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,918 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,918 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,919 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,919 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,919 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,920 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,920 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,920 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,920 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,921 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,921 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,921 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,921 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,921 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,922 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,922 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,922 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,923 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,923 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,925 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,925 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,926 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,927 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,929 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,935 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,935 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,935 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,936 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,936 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,937 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,937 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,937 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,938 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,938 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,939 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,939 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,939 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,940 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,940 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,940 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,940 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,943 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,943 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,943 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,943 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,943 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,944 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,944 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,944 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,944 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,945 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,945 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,945 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,945 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,945 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,946 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,946 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,946 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,946 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,946 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,946 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,947 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,947 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,947 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,947 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,947 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,948 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,948 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,948 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,948 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,948 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,950 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,950 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,950 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,950 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,950 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,950 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,951 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,951 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,951 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,951 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,951 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,951 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,952 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,952 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,952 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,952 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,952 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,953 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,953 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,953 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,953 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,953 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,954 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,954 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,954 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,954 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,954 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,954 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,955 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,955 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,956 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,956 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,956 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,956 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,956 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,956 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,958 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,958 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,958 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,958 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,962 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,962 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,962 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,963 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,963 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,963 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,963 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,963 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,964 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,964 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,964 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,964 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,967 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,967 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,967 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,969 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,969 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,969 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,969 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 16:49:40,974 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-08 16:49:41,025 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 16:49:41,033 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-10-08 16:49:41,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2021-10-08 16:49:41,054 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 16:49:41,067 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 290 transitions, 596 flow [2021-10-08 16:49:41,070 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 290 transitions, 596 flow [2021-10-08 16:49:41,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 273 places, 290 transitions, 596 flow [2021-10-08 16:49:41,191 INFO L129 PetriNetUnfolder]: 24/288 cut-off events. [2021-10-08 16:49:41,192 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-08 16:49:41,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 288 events. 24/288 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 320 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 224. Up to 2 conditions per place. [2021-10-08 16:49:41,208 INFO L116 LiptonReduction]: Number of co-enabled transitions 1140 [2021-10-08 16:50:32,562 INFO L131 LiptonReduction]: Checked pairs total: 1538 [2021-10-08 16:50:32,562 INFO L133 LiptonReduction]: Total number of compositions: 303 [2021-10-08 16:50:32,574 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 63 transitions, 142 flow [2021-10-08 16:50:32,626 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 915 states, 345 states have (on average 6.6173913043478265) internal successors, (2283), 914 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 915 states, 345 states have (on average 6.6173913043478265) internal successors, (2283), 914 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 16:50:32,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:50:32,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 16:50:32,638 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:50:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:50:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash 40697, now seen corresponding path program 1 times [2021-10-08 16:50:32,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:50:32,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019489739] [2021-10-08 16:50:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:50:32,660 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:50:32,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:50:32,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:50:32,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 16:50:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:50:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 16:50:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:50:33,204 INFO L354 Elim1Store]: treesize reduction 149, result has 25.9 percent of original size [2021-10-08 16:50:33,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 69 [2021-10-08 16:50:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:33,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:50:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:33,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:50:33,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019489739] [2021-10-08 16:50:33,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019489739] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:50:33,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:50:33,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 16:50:33,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174320880] [2021-10-08 16:50:33,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 16:50:33,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:50:33,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 16:50:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 16:50:33,440 INFO L87 Difference]: Start difference. First operand has 915 states, 345 states have (on average 6.6173913043478265) internal successors, (2283), 914 states have internal predecessors, (2283), 0 states have call successors, (0), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:50:34,582 INFO L93 Difference]: Finished difference Result 500 states and 1197 transitions. [2021-10-08 16:50:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 16:50:34,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 16:50:34,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:50:34,602 INFO L225 Difference]: With dead ends: 500 [2021-10-08 16:50:34,602 INFO L226 Difference]: Without dead ends: 500 [2021-10-08 16:50:34,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 16:50:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-08 16:50:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 499. [2021-10-08 16:50:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 210 states have (on average 5.7) internal successors, (1197), 498 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1197 transitions. [2021-10-08 16:50:34,687 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1197 transitions. Word has length 2 [2021-10-08 16:50:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:50:34,688 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1197 transitions. [2021-10-08 16:50:34,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1197 transitions. [2021-10-08 16:50:34,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 16:50:34,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:50:34,689 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 16:50:34,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 16:50:34,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:50:34,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:50:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:50:34,912 INFO L82 PathProgramCache]: Analyzing trace with hash 40698, now seen corresponding path program 1 times [2021-10-08 16:50:34,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:50:34,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176581685] [2021-10-08 16:50:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:50:34,917 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:50:34,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:50:34,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:50:34,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 16:50:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:50:34,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 16:50:34,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:50:35,038 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 16:50:35,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-08 16:50:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:35,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:50:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:35,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:50:35,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176581685] [2021-10-08 16:50:35,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176581685] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:50:35,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:50:35,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 16:50:35,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094514401] [2021-10-08 16:50:35,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 16:50:35,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:50:35,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 16:50:35,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 16:50:35,090 INFO L87 Difference]: Start difference. First operand 499 states and 1197 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:50:35,549 INFO L93 Difference]: Finished difference Result 497 states and 1194 transitions. [2021-10-08 16:50:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 16:50:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 16:50:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:50:35,559 INFO L225 Difference]: With dead ends: 497 [2021-10-08 16:50:35,559 INFO L226 Difference]: Without dead ends: 497 [2021-10-08 16:50:35,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 16:50:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-10-08 16:50:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2021-10-08 16:50:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 210 states have (on average 5.685714285714286) internal successors, (1194), 496 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1194 transitions. [2021-10-08 16:50:35,620 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1194 transitions. Word has length 2 [2021-10-08 16:50:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:50:35,621 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1194 transitions. [2021-10-08 16:50:35,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1194 transitions. [2021-10-08 16:50:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 16:50:35,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:50:35,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 16:50:35,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-08 16:50:35,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:50:35,833 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:50:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:50:35,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1269010, now seen corresponding path program 1 times [2021-10-08 16:50:35,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:50:35,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875153996] [2021-10-08 16:50:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:50:35,836 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:50:35,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:50:35,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:50:35,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 16:50:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:50:35,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 16:50:35,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:50:35,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 16:50:36,137 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 16:50:36,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 16:50:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:36,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:50:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:36,576 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:50:36,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875153996] [2021-10-08 16:50:36,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875153996] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:50:36,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:50:36,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-08 16:50:36,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346329598] [2021-10-08 16:50:36,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 16:50:36,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:50:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 16:50:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 16:50:36,579 INFO L87 Difference]: Start difference. First operand 497 states and 1194 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:50:39,428 INFO L93 Difference]: Finished difference Result 504 states and 1208 transitions. [2021-10-08 16:50:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 16:50:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 16:50:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:50:39,436 INFO L225 Difference]: With dead ends: 504 [2021-10-08 16:50:39,436 INFO L226 Difference]: Without dead ends: 504 [2021-10-08 16:50:39,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-08 16:50:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-10-08 16:50:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2021-10-08 16:50:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 217 states have (on average 5.566820276497696) internal successors, (1208), 503 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1208 transitions. [2021-10-08 16:50:39,454 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1208 transitions. Word has length 3 [2021-10-08 16:50:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:50:39,455 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1208 transitions. [2021-10-08 16:50:39,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1208 transitions. [2021-10-08 16:50:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 16:50:39,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:50:39,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 16:50:39,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-08 16:50:39,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:50:39,672 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:50:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:50:39,673 INFO L82 PathProgramCache]: Analyzing trace with hash 39429276, now seen corresponding path program 1 times [2021-10-08 16:50:39,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:50:39,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294618128] [2021-10-08 16:50:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:50:39,675 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:50:39,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:50:39,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:50:39,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 16:50:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:50:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 16:50:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:50:39,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2021-10-08 16:50:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:39,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:50:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:39,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:50:39,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294618128] [2021-10-08 16:50:39,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294618128] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:50:39,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:50:39,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 16:50:39,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101098677] [2021-10-08 16:50:39,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 16:50:39,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:50:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 16:50:39,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 16:50:39,986 INFO L87 Difference]: Start difference. First operand 504 states and 1208 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:50:40,829 INFO L93 Difference]: Finished difference Result 506 states and 1211 transitions. [2021-10-08 16:50:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 16:50:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-08 16:50:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:50:40,835 INFO L225 Difference]: With dead ends: 506 [2021-10-08 16:50:40,835 INFO L226 Difference]: Without dead ends: 506 [2021-10-08 16:50:40,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-08 16:50:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-10-08 16:50:40,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 505. [2021-10-08 16:50:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 218 states have (on average 5.555045871559633) internal successors, (1211), 504 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1211 transitions. [2021-10-08 16:50:40,874 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1211 transitions. Word has length 4 [2021-10-08 16:50:40,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:50:40,874 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1211 transitions. [2021-10-08 16:50:40,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1211 transitions. [2021-10-08 16:50:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 16:50:40,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:50:40,875 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 16:50:40,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 16:50:41,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:50:41,088 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:50:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:50:41,090 INFO L82 PathProgramCache]: Analyzing trace with hash 39429277, now seen corresponding path program 1 times [2021-10-08 16:50:41,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:50:41,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530831608] [2021-10-08 16:50:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:50:41,091 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:50:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:50:41,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:50:41,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-08 16:50:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:50:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 16:50:41,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:50:41,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:50:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:41,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:50:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:41,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:50:41,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530831608] [2021-10-08 16:50:41,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530831608] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:50:41,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:50:41,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-08 16:50:41,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864043217] [2021-10-08 16:50:41,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 16:50:41,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:50:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 16:50:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 16:50:41,191 INFO L87 Difference]: Start difference. First operand 505 states and 1211 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:50:41,653 INFO L93 Difference]: Finished difference Result 503 states and 1208 transitions. [2021-10-08 16:50:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 16:50:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-08 16:50:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:50:41,658 INFO L225 Difference]: With dead ends: 503 [2021-10-08 16:50:41,658 INFO L226 Difference]: Without dead ends: 503 [2021-10-08 16:50:41,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 16:50:41,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-10-08 16:50:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2021-10-08 16:50:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 218 states have (on average 5.541284403669724) internal successors, (1208), 502 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1208 transitions. [2021-10-08 16:50:41,674 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1208 transitions. Word has length 4 [2021-10-08 16:50:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:50:41,675 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1208 transitions. [2021-10-08 16:50:41,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1208 transitions. [2021-10-08 16:50:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 16:50:41,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:50:41,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 16:50:41,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-08 16:50:41,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:50:41,888 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:50:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:50:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1222314564, now seen corresponding path program 1 times [2021-10-08 16:50:41,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:50:41,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327193373] [2021-10-08 16:50:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:50:41,891 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:50:41,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:50:41,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:50:41,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-08 16:50:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:50:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 16:50:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:50:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:42,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:50:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:42,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:50:42,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327193373] [2021-10-08 16:50:42,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327193373] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:50:42,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:50:42,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-08 16:50:42,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603762532] [2021-10-08 16:50:42,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 16:50:42,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:50:42,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 16:50:42,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 16:50:42,064 INFO L87 Difference]: Start difference. First operand 503 states and 1208 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:42,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:50:42,117 INFO L93 Difference]: Finished difference Result 503 states and 1207 transitions. [2021-10-08 16:50:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 16:50:42,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 16:50:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:50:42,122 INFO L225 Difference]: With dead ends: 503 [2021-10-08 16:50:42,122 INFO L226 Difference]: Without dead ends: 503 [2021-10-08 16:50:42,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 16:50:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-10-08 16:50:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2021-10-08 16:50:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 218 states have (on average 5.536697247706422) internal successors, (1207), 502 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1207 transitions. [2021-10-08 16:50:42,139 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1207 transitions. Word has length 5 [2021-10-08 16:50:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:50:42,139 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1207 transitions. [2021-10-08 16:50:42,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1207 transitions. [2021-10-08 16:50:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 16:50:42,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:50:42,140 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1] [2021-10-08 16:50:42,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-08 16:50:42,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:50:42,347 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:50:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:50:42,348 INFO L82 PathProgramCache]: Analyzing trace with hash -842277575, now seen corresponding path program 2 times [2021-10-08 16:50:42,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:50:42,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120295967] [2021-10-08 16:50:42,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 16:50:42,350 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:50:42,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:50:42,351 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:50:42,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-08 16:50:42,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 16:50:42,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 16:50:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 16:50:42,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:50:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 16:50:42,662 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 16:50:42,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 16:50:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:42,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:50:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:43,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:50:43,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120295967] [2021-10-08 16:50:43,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120295967] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:50:43,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:50:43,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 16:50:43,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644741942] [2021-10-08 16:50:43,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 16:50:43,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:50:43,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 16:50:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-08 16:50:43,790 INFO L87 Difference]: Start difference. First operand 503 states and 1207 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:50:55,781 INFO L93 Difference]: Finished difference Result 515 states and 1230 transitions. [2021-10-08 16:50:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 16:50:55,782 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 16:50:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:50:55,787 INFO L225 Difference]: With dead ends: 515 [2021-10-08 16:50:55,787 INFO L226 Difference]: Without dead ends: 515 [2021-10-08 16:50:55,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2249.2ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-10-08 16:50:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-10-08 16:50:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 512. [2021-10-08 16:50:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 227 states have (on average 5.39647577092511) internal successors, (1225), 511 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1225 transitions. [2021-10-08 16:50:55,804 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1225 transitions. Word has length 6 [2021-10-08 16:50:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:50:55,804 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1225 transitions. [2021-10-08 16:50:55,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1225 transitions. [2021-10-08 16:50:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 16:50:55,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:50:55,805 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 16:50:55,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-08 16:50:56,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:50:56,006 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:50:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:50:56,007 INFO L82 PathProgramCache]: Analyzing trace with hash -839718517, now seen corresponding path program 1 times [2021-10-08 16:50:56,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:50:56,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061978928] [2021-10-08 16:50:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:50:56,009 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:50:56,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:50:56,010 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:50:56,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 16:50:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:50:56,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 16:50:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:50:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:56,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:50:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:50:56,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:50:56,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061978928] [2021-10-08 16:50:56,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061978928] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:50:56,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:50:56,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 16:50:56,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794714892] [2021-10-08 16:50:56,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 16:50:56,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:50:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 16:50:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-08 16:50:56,456 INFO L87 Difference]: Start difference. First operand 512 states and 1225 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:50:57,404 INFO L93 Difference]: Finished difference Result 1011 states and 2425 transitions. [2021-10-08 16:50:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 16:50:57,408 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 16:50:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:50:57,416 INFO L225 Difference]: With dead ends: 1011 [2021-10-08 16:50:57,416 INFO L226 Difference]: Without dead ends: 1011 [2021-10-08 16:50:57,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-08 16:50:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-10-08 16:50:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 512. [2021-10-08 16:50:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 227 states have (on average 5.392070484581498) internal successors, (1224), 511 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1224 transitions. [2021-10-08 16:50:57,437 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1224 transitions. Word has length 6 [2021-10-08 16:50:57,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:50:57,437 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1224 transitions. [2021-10-08 16:50:57,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:50:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1224 transitions. [2021-10-08 16:50:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 16:50:57,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:50:57,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 16:50:57,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-08 16:50:57,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:50:57,651 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:50:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:50:57,651 INFO L82 PathProgramCache]: Analyzing trace with hash -839721615, now seen corresponding path program 1 times [2021-10-08 16:50:57,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:50:57,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019567120] [2021-10-08 16:50:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:50:57,654 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:50:57,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:50:57,655 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:50:57,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 16:50:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:50:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 16:50:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:50:57,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:50:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 16:50:57,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:50:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 16:50:58,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:50:58,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019567120] [2021-10-08 16:50:58,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019567120] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:50:58,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:50:58,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 16:50:58,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038629697] [2021-10-08 16:50:58,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-08 16:50:58,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:50:58,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-08 16:50:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-08 16:50:58,150 INFO L87 Difference]: Start difference. First operand 512 states and 1224 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:51:01,061 INFO L93 Difference]: Finished difference Result 517 states and 1238 transitions. [2021-10-08 16:51:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 16:51:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 16:51:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:51:01,068 INFO L225 Difference]: With dead ends: 517 [2021-10-08 16:51:01,068 INFO L226 Difference]: Without dead ends: 517 [2021-10-08 16:51:01,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 527.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-08 16:51:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-10-08 16:51:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2021-10-08 16:51:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 232 states have (on average 5.336206896551724) internal successors, (1238), 516 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1238 transitions. [2021-10-08 16:51:01,084 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1238 transitions. Word has length 6 [2021-10-08 16:51:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:51:01,084 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1238 transitions. [2021-10-08 16:51:01,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1238 transitions. [2021-10-08 16:51:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 16:51:01,085 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:51:01,085 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:51:01,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 16:51:01,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:51:01,298 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:51:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:51:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash -261559281, now seen corresponding path program 1 times [2021-10-08 16:51:01,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:51:01,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631385683] [2021-10-08 16:51:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:51:01,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:51:01,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:51:01,302 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:51:01,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 16:51:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:51:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 16:51:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:51:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 16:51:01,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:51:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 16:51:01,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:51:01,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631385683] [2021-10-08 16:51:01,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631385683] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:51:01,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:51:01,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 16:51:01,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273739534] [2021-10-08 16:51:01,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 16:51:01,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:51:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 16:51:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 16:51:01,549 INFO L87 Difference]: Start difference. First operand 517 states and 1238 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:51:02,024 INFO L93 Difference]: Finished difference Result 517 states and 1237 transitions. [2021-10-08 16:51:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 16:51:02,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 16:51:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:51:02,032 INFO L225 Difference]: With dead ends: 517 [2021-10-08 16:51:02,032 INFO L226 Difference]: Without dead ends: 517 [2021-10-08 16:51:02,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-08 16:51:02,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-10-08 16:51:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2021-10-08 16:51:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 232 states have (on average 5.331896551724138) internal successors, (1237), 516 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1237 transitions. [2021-10-08 16:51:02,047 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1237 transitions. Word has length 7 [2021-10-08 16:51:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:51:02,047 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1237 transitions. [2021-10-08 16:51:02,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1237 transitions. [2021-10-08 16:51:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 16:51:02,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:51:02,048 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:51:02,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 16:51:02,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:51:02,262 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:51:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:51:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash 417993439, now seen corresponding path program 1 times [2021-10-08 16:51:02,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:51:02,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194125319] [2021-10-08 16:51:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:51:02,264 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:51:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:51:02,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:51:02,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-08 16:51:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:51:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 16:51:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:51:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 16:51:02,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:51:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 16:51:02,790 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:51:02,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194125319] [2021-10-08 16:51:02,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194125319] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:51:02,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:51:02,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-08 16:51:02,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535505278] [2021-10-08 16:51:02,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 16:51:02,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:51:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 16:51:02,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-08 16:51:02,794 INFO L87 Difference]: Start difference. First operand 517 states and 1237 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:51:03,808 INFO L93 Difference]: Finished difference Result 1012 states and 2429 transitions. [2021-10-08 16:51:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 16:51:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 16:51:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:51:03,819 INFO L225 Difference]: With dead ends: 1012 [2021-10-08 16:51:03,819 INFO L226 Difference]: Without dead ends: 1012 [2021-10-08 16:51:03,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-10-08 16:51:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-10-08 16:51:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 517. [2021-10-08 16:51:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 232 states have (on average 5.318965517241379) internal successors, (1234), 516 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1234 transitions. [2021-10-08 16:51:03,837 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1234 transitions. Word has length 8 [2021-10-08 16:51:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:51:03,837 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1234 transitions. [2021-10-08 16:51:03,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1234 transitions. [2021-10-08 16:51:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 16:51:03,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:51:03,838 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:51:03,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-08 16:51:04,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:51:04,051 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:51:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:51:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash 72894072, now seen corresponding path program 1 times [2021-10-08 16:51:04,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:51:04,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070926518] [2021-10-08 16:51:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:51:04,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:51:04,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:51:04,055 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:51:04,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-08 16:51:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:51:04,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 16:51:04,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:51:04,300 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 16:51:04,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 34 [2021-10-08 16:51:04,455 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-08 16:51:04,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 42 [2021-10-08 16:51:04,609 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-08 16:51:04,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 47 [2021-10-08 16:51:04,891 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-10-08 16:51:04,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 74 [2021-10-08 16:51:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:51:05,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:51:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:51:05,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:51:05,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070926518] [2021-10-08 16:51:05,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070926518] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:51:05,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:51:05,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 16:51:05,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291380338] [2021-10-08 16:51:05,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 16:51:05,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:51:05,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 16:51:05,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-08 16:51:05,304 INFO L87 Difference]: Start difference. First operand 517 states and 1234 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:51:06,092 INFO L93 Difference]: Finished difference Result 416 states and 952 transitions. [2021-10-08 16:51:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 16:51:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-08 16:51:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:51:06,094 INFO L225 Difference]: With dead ends: 416 [2021-10-08 16:51:06,095 INFO L226 Difference]: Without dead ends: 416 [2021-10-08 16:51:06,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-08 16:51:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-10-08 16:51:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2021-10-08 16:51:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 213 states have (on average 4.469483568075117) internal successors, (952), 415 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 952 transitions. [2021-10-08 16:51:06,109 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 952 transitions. Word has length 9 [2021-10-08 16:51:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:51:06,109 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 952 transitions. [2021-10-08 16:51:06,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 952 transitions. [2021-10-08 16:51:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 16:51:06,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:51:06,111 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:51:06,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-08 16:51:06,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:51:06,330 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:51:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:51:06,331 INFO L82 PathProgramCache]: Analyzing trace with hash 72894073, now seen corresponding path program 1 times [2021-10-08 16:51:06,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:51:06,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507684177] [2021-10-08 16:51:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:51:06,333 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:51:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:51:06,334 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:51:06,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-08 16:51:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:51:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 16:51:06,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:51:06,828 INFO L354 Elim1Store]: treesize reduction 145, result has 24.9 percent of original size [2021-10-08 16:51:06,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 68 [2021-10-08 16:51:06,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2021-10-08 16:51:07,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 16:51:07,062 INFO L354 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2021-10-08 16:51:07,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 33 [2021-10-08 16:51:07,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:51:07,417 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-08 16:51:07,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-10-08 16:51:07,457 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 16:51:07,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2021-10-08 16:51:07,812 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-08 16:51:07,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 65 [2021-10-08 16:51:07,845 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-08 16:51:07,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 56 [2021-10-08 16:51:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:51:08,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:51:11,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:51:11,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507684177] [2021-10-08 16:51:11,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 16:51:11,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [833385860] [2021-10-08 16:51:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:51:11,566 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 16:51:11,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 16:51:11,567 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 16:51:11,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-08 16:51:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:51:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 16:51:12,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:51:12,262 INFO L354 Elim1Store]: treesize reduction 145, result has 24.9 percent of original size [2021-10-08 16:51:12,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 68 [2021-10-08 16:51:12,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2021-10-08 16:51:12,505 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-08 16:51:12,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2021-10-08 16:51:12,712 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-08 16:51:12,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 34 [2021-10-08 16:51:13,241 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:51:13,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-08 16:51:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:51:13,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:51:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:51:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [833385860] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:51:14,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:51:14,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 5 [2021-10-08 16:51:14,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540586862] [2021-10-08 16:51:14,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-08 16:51:14,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:51:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-08 16:51:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=79, Unknown=1, NotChecked=0, Total=132 [2021-10-08 16:51:14,843 INFO L87 Difference]: Start difference. First operand 416 states and 952 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:51:25,550 INFO L93 Difference]: Finished difference Result 315 states and 670 transitions. [2021-10-08 16:51:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 16:51:25,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-08 16:51:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:51:25,553 INFO L225 Difference]: With dead ends: 315 [2021-10-08 16:51:25,554 INFO L226 Difference]: Without dead ends: 315 [2021-10-08 16:51:25,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3514.7ms TimeCoverageRelationStatistics Valid=52, Invalid=79, Unknown=1, NotChecked=0, Total=132 [2021-10-08 16:51:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-10-08 16:51:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-10-08 16:51:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 194 states have (on average 3.4536082474226806) internal successors, (670), 314 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 670 transitions. [2021-10-08 16:51:25,562 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 670 transitions. Word has length 9 [2021-10-08 16:51:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:51:25,563 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 670 transitions. [2021-10-08 16:51:25,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:25,563 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 670 transitions. [2021-10-08 16:51:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 16:51:25,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:51:25,564 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:51:25,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-08 16:51:25,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-08 16:51:25,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:51:25,968 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:51:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:51:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2035251887, now seen corresponding path program 1 times [2021-10-08 16:51:25,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:51:25,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626826065] [2021-10-08 16:51:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:51:25,970 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:51:25,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:51:25,971 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:51:25,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 16:51:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:51:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 16:51:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:51:26,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:51:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:51:26,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:51:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:51:26,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:51:26,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626826065] [2021-10-08 16:51:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626826065] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:51:26,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:51:26,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-10-08 16:51:26,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473727239] [2021-10-08 16:51:26,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 16:51:26,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:51:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 16:51:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-08 16:51:26,900 INFO L87 Difference]: Start difference. First operand 315 states and 670 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:51:34,834 INFO L93 Difference]: Finished difference Result 1451 states and 3138 transitions. [2021-10-08 16:51:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 16:51:34,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 16:51:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:51:34,847 INFO L225 Difference]: With dead ends: 1451 [2021-10-08 16:51:34,847 INFO L226 Difference]: Without dead ends: 1451 [2021-10-08 16:51:34,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1125.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-10-08 16:51:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-10-08 16:51:34,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 319. [2021-10-08 16:51:34,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 198 states have (on average 3.4242424242424243) internal successors, (678), 318 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 678 transitions. [2021-10-08 16:51:34,865 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 678 transitions. Word has length 10 [2021-10-08 16:51:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:51:34,865 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 678 transitions. [2021-10-08 16:51:34,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 678 transitions. [2021-10-08 16:51:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 16:51:34,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:51:34,866 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-08 16:51:34,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-08 16:51:35,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:51:35,080 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:51:35,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:51:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2038083003, now seen corresponding path program 1 times [2021-10-08 16:51:35,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:51:35,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650124142] [2021-10-08 16:51:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:51:35,082 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:51:35,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:51:35,084 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:51:35,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 16:51:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:51:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 16:51:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:51:35,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-10-08 16:51:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 16:51:35,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:51:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 16:51:36,916 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:51:36,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650124142] [2021-10-08 16:51:36,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650124142] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:51:36,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:51:36,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-08 16:51:36,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603920085] [2021-10-08 16:51:36,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-08 16:51:36,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:51:36,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-08 16:51:36,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-10-08 16:51:36,919 INFO L87 Difference]: Start difference. First operand 319 states and 678 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:51:41,624 INFO L93 Difference]: Finished difference Result 928 states and 1982 transitions. [2021-10-08 16:51:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 16:51:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 16:51:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:51:41,632 INFO L225 Difference]: With dead ends: 928 [2021-10-08 16:51:41,632 INFO L226 Difference]: Without dead ends: 928 [2021-10-08 16:51:41,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2392.8ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-10-08 16:51:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-10-08 16:51:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 339. [2021-10-08 16:51:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 218 states have (on average 3.279816513761468) internal successors, (715), 338 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 715 transitions. [2021-10-08 16:51:41,647 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 715 transitions. Word has length 10 [2021-10-08 16:51:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:51:41,647 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 715 transitions. [2021-10-08 16:51:41,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 715 transitions. [2021-10-08 16:51:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:51:41,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:51:41,648 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:51:41,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 16:51:41,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:51:41,862 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:51:41,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:51:41,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1331758617, now seen corresponding path program 1 times [2021-10-08 16:51:41,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:51:41,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762064978] [2021-10-08 16:51:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:51:41,864 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:51:41,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:51:41,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:51:41,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 16:51:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:51:42,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 16:51:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:51:42,169 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 16:51:42,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-08 16:51:42,217 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 16:51:42,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-08 16:51:42,313 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-08 16:51:42,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 56 [2021-10-08 16:51:42,572 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-10-08 16:51:42,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 76 [2021-10-08 16:51:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:51:42,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:51:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:51:51,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:51:51,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762064978] [2021-10-08 16:51:51,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762064978] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:51:51,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:51:51,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 16:51:51,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624225373] [2021-10-08 16:51:51,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 16:51:51,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:51:51,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 16:51:51,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=32, Unknown=4, NotChecked=0, Total=56 [2021-10-08 16:51:51,467 INFO L87 Difference]: Start difference. First operand 339 states and 715 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:51:52,367 INFO L93 Difference]: Finished difference Result 293 states and 608 transitions. [2021-10-08 16:51:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 16:51:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:51:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:51:52,370 INFO L225 Difference]: With dead ends: 293 [2021-10-08 16:51:52,370 INFO L226 Difference]: Without dead ends: 293 [2021-10-08 16:51:52,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8652.5ms TimeCoverageRelationStatistics Valid=36, Invalid=50, Unknown=4, NotChecked=0, Total=90 [2021-10-08 16:51:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-10-08 16:51:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-10-08 16:51:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 193 states have (on average 3.150259067357513) internal successors, (608), 292 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 608 transitions. [2021-10-08 16:51:52,379 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 608 transitions. Word has length 11 [2021-10-08 16:51:52,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:51:52,380 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 608 transitions. [2021-10-08 16:51:52,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:51:52,380 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 608 transitions. [2021-10-08 16:51:52,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:51:52,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:51:52,381 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:51:52,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-08 16:51:52,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:51:52,599 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:51:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:51:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1331758618, now seen corresponding path program 1 times [2021-10-08 16:51:52,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:51:52,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562677433] [2021-10-08 16:51:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:51:52,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:51:52,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:51:52,604 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:51:52,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 16:51:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:51:52,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-08 16:51:52,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:51:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 16:51:53,104 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 16:51:53,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 71 [2021-10-08 16:51:53,157 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 16:51:53,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 80 [2021-10-08 16:51:53,353 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 16:51:53,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2021-10-08 16:51:53,381 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 16:51:53,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2021-10-08 16:51:53,619 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-08 16:51:53,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 65 [2021-10-08 16:51:53,675 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-08 16:51:53,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 71 [2021-10-08 16:51:54,212 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-08 16:51:54,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 90 [2021-10-08 16:51:54,276 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-08 16:51:54,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 83 [2021-10-08 16:51:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:51:56,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:52:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:52:02,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:52:02,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562677433] [2021-10-08 16:52:02,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562677433] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:52:02,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:52:02,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 16:52:02,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480083390] [2021-10-08 16:52:02,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 16:52:02,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:52:02,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 16:52:02,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=95, Unknown=1, NotChecked=0, Total=132 [2021-10-08 16:52:02,597 INFO L87 Difference]: Start difference. First operand 293 states and 608 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:52:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:52:40,186 INFO L93 Difference]: Finished difference Result 522 states and 1120 transitions. [2021-10-08 16:52:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 16:52:40,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:52:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:52:40,191 INFO L225 Difference]: With dead ends: 522 [2021-10-08 16:52:40,191 INFO L226 Difference]: Without dead ends: 522 [2021-10-08 16:52:40,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 13617.3ms TimeCoverageRelationStatistics Valid=89, Invalid=250, Unknown=3, NotChecked=0, Total=342 [2021-10-08 16:52:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-10-08 16:52:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 315. [2021-10-08 16:52:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 215 states have (on average 3.2325581395348837) internal successors, (695), 314 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:52:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 695 transitions. [2021-10-08 16:52:40,205 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 695 transitions. Word has length 11 [2021-10-08 16:52:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:52:40,205 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 695 transitions. [2021-10-08 16:52:40,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:52:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 695 transitions. [2021-10-08 16:52:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:52:40,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:52:40,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:52:40,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-08 16:52:40,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:52:40,420 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:52:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:52:40,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1331758619, now seen corresponding path program 1 times [2021-10-08 16:52:40,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:52:40,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693682499] [2021-10-08 16:52:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:52:40,422 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:52:40,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:52:40,423 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:52:40,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 16:52:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:52:40,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-08 16:52:40,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:52:40,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:52:40,768 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 16:52:40,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-10-08 16:52:40,846 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-08 16:52:40,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2021-10-08 16:52:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:52:40,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:52:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:52:43,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:52:43,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693682499] [2021-10-08 16:52:43,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693682499] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:52:43,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:52:43,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 16:52:43,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095465420] [2021-10-08 16:52:43,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 16:52:43,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:52:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 16:52:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2021-10-08 16:52:43,036 INFO L87 Difference]: Start difference. First operand 315 states and 695 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:52:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:52:43,546 INFO L93 Difference]: Finished difference Result 271 states and 575 transitions. [2021-10-08 16:52:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 16:52:43,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:52:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:52:43,549 INFO L225 Difference]: With dead ends: 271 [2021-10-08 16:52:43,549 INFO L226 Difference]: Without dead ends: 271 [2021-10-08 16:52:43,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2093.6ms TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-10-08 16:52:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-10-08 16:52:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2021-10-08 16:52:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 190 states have (on average 3.026315789473684) internal successors, (575), 270 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:52:43,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 575 transitions. [2021-10-08 16:52:43,558 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 575 transitions. Word has length 11 [2021-10-08 16:52:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:52:43,558 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 575 transitions. [2021-10-08 16:52:43,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:52:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 575 transitions. [2021-10-08 16:52:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:52:43,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:52:43,559 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:52:43,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-08 16:52:43,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:52:43,778 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:52:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:52:43,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1331758892, now seen corresponding path program 1 times [2021-10-08 16:52:43,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:52:43,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790918004] [2021-10-08 16:52:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:52:43,780 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:52:43,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:52:43,783 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:52:43,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-08 16:52:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:52:44,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 16:52:44,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:52:44,269 INFO L354 Elim1Store]: treesize reduction 149, result has 22.8 percent of original size [2021-10-08 16:52:44,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 64 [2021-10-08 16:52:44,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2021-10-08 16:52:44,904 INFO L354 Elim1Store]: treesize reduction 64, result has 27.3 percent of original size [2021-10-08 16:52:44,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 53 [2021-10-08 16:52:46,981 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:52:46,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790918004] [2021-10-08 16:52:46,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 16:52:46,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267781610] [2021-10-08 16:52:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:52:46,982 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 16:52:46,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 16:52:46,987 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 16:52:46,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-08 16:52:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:52:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 16:52:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:52:47,777 INFO L354 Elim1Store]: treesize reduction 145, result has 24.9 percent of original size [2021-10-08 16:52:47,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 58 [2021-10-08 16:52:48,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 16:52:48,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395077316] [2021-10-08 16:52:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:52:48,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 16:52:48,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 16:52:48,701 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 16:52:48,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-08 16:52:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:52:49,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 16:52:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:52:49,255 INFO L354 Elim1Store]: treesize reduction 149, result has 22.8 percent of original size [2021-10-08 16:52:49,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 76 [2021-10-08 16:52:49,311 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 16:52:49,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 85 [2021-10-08 16:52:49,833 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-10-08 16:52:49,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 82 [2021-10-08 16:52:49,934 INFO L354 Elim1Store]: treesize reduction 69, result has 34.9 percent of original size [2021-10-08 16:52:49,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 73 treesize of output 100 [2021-10-08 16:52:50,917 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-10-08 16:52:50,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 130 [2021-10-08 16:52:50,985 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-10-08 16:52:50,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 119 [2021-10-08 16:52:51,661 INFO L354 Elim1Store]: treesize reduction 100, result has 24.8 percent of original size [2021-10-08 16:52:51,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 95 [2021-10-08 16:53:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:53:01,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:53:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:53:08,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395077316] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:53:08,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:53:08,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 16:53:08,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181681086] [2021-10-08 16:53:08,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 16:53:08,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:53:08,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 16:53:08,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=126, Unknown=2, NotChecked=0, Total=182 [2021-10-08 16:53:08,729 INFO L87 Difference]: Start difference. First operand 271 states and 575 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:53:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:53:12,028 INFO L93 Difference]: Finished difference Result 436 states and 935 transitions. [2021-10-08 16:53:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 16:53:12,029 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:53:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:53:12,032 INFO L225 Difference]: With dead ends: 436 [2021-10-08 16:53:12,032 INFO L226 Difference]: Without dead ends: 436 [2021-10-08 16:53:12,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5737.1ms TimeCoverageRelationStatistics Valid=78, Invalid=160, Unknown=2, NotChecked=0, Total=240 [2021-10-08 16:53:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-10-08 16:53:12,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 237. [2021-10-08 16:53:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 184 states have (on average 2.733695652173913) internal successors, (503), 236 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:53:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 503 transitions. [2021-10-08 16:53:12,037 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 503 transitions. Word has length 11 [2021-10-08 16:53:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:53:12,037 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 503 transitions. [2021-10-08 16:53:12,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:53:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 503 transitions. [2021-10-08 16:53:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:53:12,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:53:12,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:53:12,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-08 16:53:12,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-08 16:53:12,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-08 16:53:12,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-10-08 16:53:12,640 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:53:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:53:12,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1331758620, now seen corresponding path program 1 times [2021-10-08 16:53:12,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:53:12,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620091472] [2021-10-08 16:53:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:53:12,644 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:53:12,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:53:12,645 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:53:12,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-08 16:53:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:53:13,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 16:53:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:53:13,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:53:13,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 16:53:13,255 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:53:13,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-08 16:53:13,289 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 16:53:13,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-10-08 16:53:13,492 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:53:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 50 [2021-10-08 16:53:13,519 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-08 16:53:13,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-10-08 16:53:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:53:13,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:53:17,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:53:17,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620091472] [2021-10-08 16:53:17,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 16:53:17,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [787563009] [2021-10-08 16:53:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:53:17,067 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 16:53:17,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 16:53:17,068 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 16:53:17,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-08 16:53:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:53:17,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 16:53:17,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:53:17,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:53:17,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 16:53:17,996 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:53:17,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-10-08 16:53:18,018 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 16:53:18,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2021-10-08 16:53:18,147 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:53:18,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2021-10-08 16:53:18,175 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-08 16:53:18,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-10-08 16:53:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:53:18,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:53:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:53:19,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [787563009] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:53:19,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:53:19,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 16:53:19,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221079839] [2021-10-08 16:53:19,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 16:53:19,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:53:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 16:53:19,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=114, Unknown=1, NotChecked=0, Total=156 [2021-10-08 16:53:19,498 INFO L87 Difference]: Start difference. First operand 237 states and 503 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:53:42,425 WARN L207 SmtUtils]: Spent 7.15 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-10-08 16:53:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:53:50,130 INFO L93 Difference]: Finished difference Result 561 states and 1150 transitions. [2021-10-08 16:53:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 16:53:50,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:53:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:53:50,139 INFO L225 Difference]: With dead ends: 561 [2021-10-08 16:53:50,139 INFO L226 Difference]: Without dead ends: 561 [2021-10-08 16:53:50,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 21024.6ms TimeCoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2021-10-08 16:53:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-10-08 16:53:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 276. [2021-10-08 16:53:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 224 states have (on average 2.763392857142857) internal successors, (619), 275 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:53:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 619 transitions. [2021-10-08 16:53:50,148 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 619 transitions. Word has length 11 [2021-10-08 16:53:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:53:50,148 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 619 transitions. [2021-10-08 16:53:50,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:53:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 619 transitions. [2021-10-08 16:53:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:53:50,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:53:50,149 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:53:50,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-08 16:53:50,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-08 16:53:50,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-10-08 16:53:50,556 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:53:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:53:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1331758621, now seen corresponding path program 1 times [2021-10-08 16:53:50,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:53:50,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875687066] [2021-10-08 16:53:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:53:50,559 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:53:50,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:53:50,560 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:53:50,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-08 16:53:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:53:50,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 16:53:50,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:53:51,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:53:51,047 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 16:53:51,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-10-08 16:53:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:53:51,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:53:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:53:53,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:53:53,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875687066] [2021-10-08 16:53:53,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875687066] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:53:53,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:53:53,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 16:53:53,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762873502] [2021-10-08 16:53:53,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 16:53:53,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:53:53,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 16:53:53,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2021-10-08 16:53:53,236 INFO L87 Difference]: Start difference. First operand 276 states and 619 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:53:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:53:53,984 INFO L93 Difference]: Finished difference Result 242 states and 526 transitions. [2021-10-08 16:53:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 16:53:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:53:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:53:53,989 INFO L225 Difference]: With dead ends: 242 [2021-10-08 16:53:53,989 INFO L226 Difference]: Without dead ends: 242 [2021-10-08 16:53:53,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2080.5ms TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-10-08 16:53:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-08 16:53:53,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2021-10-08 16:53:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 203 states have (on average 2.5911330049261085) internal successors, (526), 241 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:53:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 526 transitions. [2021-10-08 16:53:53,997 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 526 transitions. Word has length 11 [2021-10-08 16:53:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:53:53,997 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 526 transitions. [2021-10-08 16:53:53,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:53:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 526 transitions. [2021-10-08 16:53:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:53:53,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:53:53,998 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:53:54,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-08 16:53:54,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:53:54,201 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:53:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:53:54,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1331758622, now seen corresponding path program 1 times [2021-10-08 16:53:54,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:53:54,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541694454] [2021-10-08 16:53:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:53:54,203 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:53:54,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:53:54,204 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:53:54,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-08 16:53:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:53:54,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 16:53:54,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:53:54,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:53:54,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 16:53:54,956 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:53:54,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-08 16:53:54,970 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 16:53:54,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-10-08 16:53:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:53:55,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:53:55,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:53:55,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541694454] [2021-10-08 16:53:55,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 16:53:55,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1408383407] [2021-10-08 16:53:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:53:55,830 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 16:53:55,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 16:53:55,832 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 16:53:55,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-08 16:53:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:53:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 16:53:56,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:53:56,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 16:53:56,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:53:56,951 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:53:56,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-10-08 16:53:56,974 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 16:53:56,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-10-08 16:53:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 16:53:57,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:53:57,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 16:53:57,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899008306] [2021-10-08 16:53:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:53:57,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 16:53:57,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 16:53:57,711 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 16:53:57,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-08 16:53:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:53:58,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 16:53:58,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:53:58,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:53:58,802 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 16:53:58,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-10-08 16:53:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 16:53:58,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:54:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 16:54:00,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899008306] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:54:00,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:54:00,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-08 16:54:00,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339546316] [2021-10-08 16:54:00,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 16:54:00,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:54:00,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 16:54:00,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-10-08 16:54:00,437 INFO L87 Difference]: Start difference. First operand 242 states and 526 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:54:14,973 INFO L93 Difference]: Finished difference Result 594 states and 1184 transitions. [2021-10-08 16:54:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-08 16:54:14,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:54:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:54:14,979 INFO L225 Difference]: With dead ends: 594 [2021-10-08 16:54:14,980 INFO L226 Difference]: Without dead ends: 594 [2021-10-08 16:54:14,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 12768.9ms TimeCoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2021-10-08 16:54:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-10-08 16:54:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 288. [2021-10-08 16:54:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 249 states have (on average 2.606425702811245) internal successors, (649), 287 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 649 transitions. [2021-10-08 16:54:14,990 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 649 transitions. Word has length 11 [2021-10-08 16:54:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:54:14,990 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 649 transitions. [2021-10-08 16:54:14,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 649 transitions. [2021-10-08 16:54:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:54:14,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:54:14,991 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:54:15,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-08 16:54:15,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-08 16:54:15,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-08 16:54:15,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-10-08 16:54:15,607 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:54:15,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:54:15,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1331758623, now seen corresponding path program 1 times [2021-10-08 16:54:15,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:54:15,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217168025] [2021-10-08 16:54:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:54:15,609 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:54:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:54:15,610 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:54:15,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-08 16:54:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:54:15,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 16:54:15,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:54:15,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:54:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:54:16,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:54:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:54:16,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:54:16,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217168025] [2021-10-08 16:54:16,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217168025] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 16:54:16,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:54:16,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-08 16:54:16,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894513813] [2021-10-08 16:54:16,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 16:54:16,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:54:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 16:54:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 16:54:16,052 INFO L87 Difference]: Start difference. First operand 288 states and 649 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:54:16,627 INFO L93 Difference]: Finished difference Result 256 states and 541 transitions. [2021-10-08 16:54:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 16:54:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:54:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:54:16,630 INFO L225 Difference]: With dead ends: 256 [2021-10-08 16:54:16,630 INFO L226 Difference]: Without dead ends: 256 [2021-10-08 16:54:16,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 16:54:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-10-08 16:54:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-10-08 16:54:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 228 states have (on average 2.3728070175438596) internal successors, (541), 255 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 541 transitions. [2021-10-08 16:54:16,636 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 541 transitions. Word has length 11 [2021-10-08 16:54:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:54:16,636 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 541 transitions. [2021-10-08 16:54:16,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 541 transitions. [2021-10-08 16:54:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:54:16,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:54:16,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:54:16,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-08 16:54:16,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:54:16,850 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:54:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:54:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1331758624, now seen corresponding path program 1 times [2021-10-08 16:54:16,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:54:16,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102991895] [2021-10-08 16:54:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:54:16,852 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:54:16,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:54:16,853 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:54:16,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-08 16:54:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:54:17,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 16:54:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:54:17,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:54:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 16:54:17,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:54:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 16:54:18,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:54:18,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102991895] [2021-10-08 16:54:18,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102991895] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:54:18,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:54:18,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 16:54:18,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332403174] [2021-10-08 16:54:18,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-08 16:54:18,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:54:18,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-08 16:54:18,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-08 16:54:18,951 INFO L87 Difference]: Start difference. First operand 256 states and 541 transitions. Second operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:54:23,004 INFO L93 Difference]: Finished difference Result 450 states and 924 transitions. [2021-10-08 16:54:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 16:54:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:54:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:54:23,011 INFO L225 Difference]: With dead ends: 450 [2021-10-08 16:54:23,012 INFO L226 Difference]: Without dead ends: 450 [2021-10-08 16:54:23,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2608.2ms TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2021-10-08 16:54:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-10-08 16:54:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 329. [2021-10-08 16:54:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 302 states have (on average 2.4768211920529803) internal successors, (748), 328 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 748 transitions. [2021-10-08 16:54:23,021 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 748 transitions. Word has length 11 [2021-10-08 16:54:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:54:23,022 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 748 transitions. [2021-10-08 16:54:23,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 748 transitions. [2021-10-08 16:54:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 16:54:23,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:54:23,023 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2021-10-08 16:54:23,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-08 16:54:23,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:54:23,230 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:54:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:54:23,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1698445928, now seen corresponding path program 1 times [2021-10-08 16:54:23,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:54:23,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634307853] [2021-10-08 16:54:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 16:54:23,232 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:54:23,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:54:23,233 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:54:23,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-08 16:54:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 16:54:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 16:54:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:54:23,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 16:54:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 16:54:24,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:54:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 16:54:27,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:54:27,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634307853] [2021-10-08 16:54:27,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634307853] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:54:27,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:54:27,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-08 16:54:27,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584647070] [2021-10-08 16:54:27,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-08 16:54:27,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:54:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-08 16:54:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-10-08 16:54:27,291 INFO L87 Difference]: Start difference. First operand 329 states and 748 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:54:54,931 INFO L93 Difference]: Finished difference Result 371 states and 828 transitions. [2021-10-08 16:54:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-08 16:54:54,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 16:54:54,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:54:54,934 INFO L225 Difference]: With dead ends: 371 [2021-10-08 16:54:54,934 INFO L226 Difference]: Without dead ends: 371 [2021-10-08 16:54:54,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 11091.3ms TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-10-08 16:54:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-10-08 16:54:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 357. [2021-10-08 16:54:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 330 states have (on average 2.4363636363636365) internal successors, (804), 356 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 804 transitions. [2021-10-08 16:54:54,943 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 804 transitions. Word has length 11 [2021-10-08 16:54:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:54:54,944 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 804 transitions. [2021-10-08 16:54:54,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:54:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 804 transitions. [2021-10-08 16:54:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 16:54:54,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:54:54,945 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2021-10-08 16:54:54,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-08 16:54:55,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:54:55,159 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:54:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:54:55,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1686891608, now seen corresponding path program 2 times [2021-10-08 16:54:55,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:54:55,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330184107] [2021-10-08 16:54:55,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 16:54:55,160 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:54:55,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:54:55,162 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:54:55,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-08 16:54:55,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 16:54:55,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 16:54:55,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 16:54:55,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:54:55,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:54:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:54:55,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:54:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 16:54:57,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:54:57,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330184107] [2021-10-08 16:54:57,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330184107] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:54:57,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:54:57,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 16:54:57,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987799206] [2021-10-08 16:54:57,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-08 16:54:57,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:54:57,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-08 16:54:57,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-10-08 16:54:57,546 INFO L87 Difference]: Start difference. First operand 357 states and 804 transitions. Second operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:55:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:55:14,005 INFO L93 Difference]: Finished difference Result 402 states and 894 transitions. [2021-10-08 16:55:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 16:55:14,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 16:55:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:55:14,017 INFO L225 Difference]: With dead ends: 402 [2021-10-08 16:55:14,017 INFO L226 Difference]: Without dead ends: 402 [2021-10-08 16:55:14,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 5525.6ms TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2021-10-08 16:55:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-10-08 16:55:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2021-10-08 16:55:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 375 states have (on average 2.384) internal successors, (894), 401 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:55:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 894 transitions. [2021-10-08 16:55:14,024 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 894 transitions. Word has length 12 [2021-10-08 16:55:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:55:14,025 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 894 transitions. [2021-10-08 16:55:14,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:55:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 894 transitions. [2021-10-08 16:55:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 16:55:14,032 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:55:14,033 INFO L512 BasicCegarLoop]: trace histogram [11, 1, 1] [2021-10-08 16:55:14,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-08 16:55:14,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:55:14,233 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:55:14,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:55:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1750290802, now seen corresponding path program 3 times [2021-10-08 16:55:14,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:55:14,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309793990] [2021-10-08 16:55:14,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 16:55:14,236 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:55:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:55:14,237 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:55:14,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-08 16:55:14,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-08 16:55:14,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 16:55:14,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 16:55:14,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:55:14,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 16:55:14,903 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 16:55:14,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 16:55:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:55:15,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:55:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 16:55:20,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:55:20,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309793990] [2021-10-08 16:55:20,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309793990] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 16:55:20,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 16:55:20,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-08 16:55:20,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139784938] [2021-10-08 16:55:20,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-08 16:55:20,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 16:55:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-08 16:55:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-10-08 16:55:20,798 INFO L87 Difference]: Start difference. First operand 402 states and 894 transitions. Second operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:55:28,489 WARN L207 SmtUtils]: Spent 7.00 s on a formula simplification that was a NOOP. DAG size: 147 [2021-10-08 16:55:37,512 WARN L207 SmtUtils]: Spent 5.29 s on a formula simplification that was a NOOP. DAG size: 135 [2021-10-08 16:56:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 16:56:23,308 INFO L93 Difference]: Finished difference Result 444 states and 974 transitions. [2021-10-08 16:56:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-08 16:56:23,311 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-08 16:56:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 16:56:23,314 INFO L225 Difference]: With dead ends: 444 [2021-10-08 16:56:23,314 INFO L226 Difference]: Without dead ends: 444 [2021-10-08 16:56:23,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 38336.7ms TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2021-10-08 16:56:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-10-08 16:56:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 415. [2021-10-08 16:56:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 388 states have (on average 2.3711340206185567) internal successors, (920), 414 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:56:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 920 transitions. [2021-10-08 16:56:23,323 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 920 transitions. Word has length 13 [2021-10-08 16:56:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 16:56:23,324 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 920 transitions. [2021-10-08 16:56:23,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 16:56:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 920 transitions. [2021-10-08 16:56:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 16:56:23,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 16:56:23,325 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 16:56:23,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-08 16:56:23,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 16:56:23,527 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 64 more)] === [2021-10-08 16:56:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 16:56:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash -666210021, now seen corresponding path program 2 times [2021-10-08 16:56:23,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 16:56:23,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646357799] [2021-10-08 16:56:23,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 16:56:23,530 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 16:56:23,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 16:56:23,531 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 16:56:23,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-08 16:56:23,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 16:56:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 16:56:23,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 16:56:23,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:56:24,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:56:24,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 16:56:24,216 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:56:24,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-10-08 16:56:24,231 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 16:56:24,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-10-08 16:56:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-08 16:56:24,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:56:24,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 16:56:24,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646357799] [2021-10-08 16:56:24,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 16:56:24,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1254487349] [2021-10-08 16:56:24,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 16:56:24,914 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 16:56:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 16:56:24,916 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 16:56:24,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-08 16:56:25,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 16:56:25,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 16:56:25,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 16:56:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:56:25,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 16:56:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:56:26,009 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:56:26,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-10-08 16:56:26,025 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 16:56:26,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-10-08 16:56:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-08 16:56:26,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:56:26,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 16:56:26,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643997813] [2021-10-08 16:56:26,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 16:56:26,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 16:56:26,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 16:56:26,601 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 16:56:26,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-08 16:56:27,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 16:56:27,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 16:56:27,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 16:56:27,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 16:56:27,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 16:56:27,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 16:56:27,550 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-08 16:56:27,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-10-08 16:56:27,564 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 16:56:27,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-10-08 16:56:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-08 16:56:27,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 16:56:28,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 16:56:28,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-08 16:56:28,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-08 16:56:28,804 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-08 16:56:28,804 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-08 16:56:28,808 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err5REQUIRES_VIOLATION [2021-10-08 16:56:28,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-08 16:56:28,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-08 16:56:28,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2REQUIRES_VIOLATION [2021-10-08 16:56:28,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3REQUIRES_VIOLATION [2021-10-08 16:56:28,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err4REQUIRES_VIOLATION [2021-10-08 16:56:28,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err5REQUIRES_VIOLATION [2021-10-08 16:56:28,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err6REQUIRES_VIOLATION [2021-10-08 16:56:28,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err7REQUIRES_VIOLATION [2021-10-08 16:56:28,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err8REQUIRES_VIOLATION [2021-10-08 16:56:28,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err9REQUIRES_VIOLATION [2021-10-08 16:56:28,811 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err10REQUIRES_VIOLATION [2021-10-08 16:56:28,812 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err11REQUIRES_VIOLATION [2021-10-08 16:56:28,812 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-08 16:56:28,812 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-08 16:56:28,812 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-08 16:56:28,812 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-08 16:56:28,812 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATION [2021-10-08 16:56:28,812 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATION [2021-10-08 16:56:28,812 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err6REQUIRES_VIOLATION [2021-10-08 16:56:28,813 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err7REQUIRES_VIOLATION [2021-10-08 16:56:28,813 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err8REQUIRES_VIOLATION [2021-10-08 16:56:28,813 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err9REQUIRES_VIOLATION [2021-10-08 16:56:28,813 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err10REQUIRES_VIOLATION [2021-10-08 16:56:28,813 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err11REQUIRES_VIOLATION [2021-10-08 16:56:28,813 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 16:56:28,813 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 16:56:28,813 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 16:56:28,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 16:56:28,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 16:56:28,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 16:56:28,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 16:56:28,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 16:56:28,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 16:56:28,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 16:56:28,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-08 16:56:28,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-08 16:56:28,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-08 16:56:28,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-08 16:56:28,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-08 16:56:28,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-08 16:56:28,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 16:56:28,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 16:56:28,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 16:56:28,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 16:56:28,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-08 16:56:28,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-08 16:56:28,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2REQUIRES_VIOLATION [2021-10-08 16:56:28,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3REQUIRES_VIOLATION [2021-10-08 16:56:28,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err4REQUIRES_VIOLATION [2021-10-08 16:56:28,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err6REQUIRES_VIOLATION [2021-10-08 16:56:28,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err7REQUIRES_VIOLATION [2021-10-08 16:56:28,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err8REQUIRES_VIOLATION [2021-10-08 16:56:28,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err9REQUIRES_VIOLATION [2021-10-08 16:56:28,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err10REQUIRES_VIOLATION [2021-10-08 16:56:28,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err11REQUIRES_VIOLATION [2021-10-08 16:56:28,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-08 16:56:28,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-08 16:56:28,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-08 16:56:28,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-08 16:56:28,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATION [2021-10-08 16:56:28,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATION [2021-10-08 16:56:28,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err6REQUIRES_VIOLATION [2021-10-08 16:56:28,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err7REQUIRES_VIOLATION [2021-10-08 16:56:28,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err8REQUIRES_VIOLATION [2021-10-08 16:56:28,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err9REQUIRES_VIOLATION [2021-10-08 16:56:28,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err10REQUIRES_VIOLATION [2021-10-08 16:56:28,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err11REQUIRES_VIOLATION [2021-10-08 16:56:28,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-08 16:56:29,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-10-08 16:56:29,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-08 16:56:29,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 16:56:29,429 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 16:56:29,429 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 16:56:29,431 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:589) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-08 16:56:29,435 INFO L168 Benchmark]: Toolchain (without parser) took 415138.32 ms. Allocated memory was 162.5 MB in the beginning and 217.1 MB in the end (delta: 54.5 MB). Free memory was 136.9 MB in the beginning and 73.9 MB in the end (delta: 63.0 MB). Peak memory consumption was 117.8 MB. Max. memory is 8.0 GB. [2021-10-08 16:56:29,435 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory was 132.1 MB in the beginning and 131.9 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 16:56:29,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 448.22 ms. Allocated memory is still 162.5 MB. Free memory was 136.4 MB in the beginning and 121.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-08 16:56:29,436 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.50 ms. Allocated memory is still 162.5 MB. Free memory was 121.5 MB in the beginning and 119.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-10-08 16:56:29,436 INFO L168 Benchmark]: Boogie Preprocessor took 51.38 ms. Allocated memory is still 162.5 MB. Free memory was 119.2 MB in the beginning and 117.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 16:56:29,437 INFO L168 Benchmark]: RCFGBuilder took 5946.86 ms. Allocated memory was 162.5 MB in the beginning and 217.1 MB in the end (delta: 54.5 MB). Free memory was 117.2 MB in the beginning and 193.5 MB in the end (delta: -76.3 MB). Peak memory consumption was 70.7 MB. Max. memory is 8.0 GB. [2021-10-08 16:56:29,437 INFO L168 Benchmark]: TraceAbstraction took 408614.22 ms. Allocated memory is still 217.1 MB. Free memory was 192.7 MB in the beginning and 73.9 MB in the end (delta: 118.9 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. [2021-10-08 16:56:29,444 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory was 132.1 MB in the beginning and 131.9 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 448.22 ms. Allocated memory is still 162.5 MB. Free memory was 136.4 MB in the beginning and 121.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 59.50 ms. Allocated memory is still 162.5 MB. Free memory was 121.5 MB in the beginning and 119.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.38 ms. Allocated memory is still 162.5 MB. Free memory was 119.2 MB in the beginning and 117.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 5946.86 ms. Allocated memory was 162.5 MB in the beginning and 217.1 MB in the end (delta: 54.5 MB). Free memory was 117.2 MB in the beginning and 193.5 MB in the end (delta: -76.3 MB). Peak memory consumption was 70.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 408614.22 ms. Allocated memory is still 217.1 MB. Free memory was 192.7 MB in the beginning and 73.9 MB in the end (delta: 118.9 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 51492.3ms, 273 PlacesBefore, 66 PlacesAfterwards, 290 TransitionsBefore, 63 TransitionsAfterwards, 1140 CoEnabledTransitionPairs, 8 FixpointIterations, 213 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 53 TrivialYvCompositions, 0 ConcurrentYvCompositions, 20 ChoiceCompositions, 303 TotalNumberOfCompositions, 1538 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1216, positive: 1189, positive conditional: 0, positive unconditional: 1189, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 367, positive: 359, positive conditional: 0, positive unconditional: 359, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 367, positive: 359, positive conditional: 0, positive unconditional: 359, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1742, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1742, negative conditional: 0, negative unconditional: 1742, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1216, positive: 830, positive conditional: 0, positive unconditional: 830, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 367, unknown conditional: 0, unknown unconditional: 367] , Statistics on independence cache: Total cache size (in pairs): 101, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - 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 - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-08 16:56:29,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...