/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/popl20-more-min-le-max.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:18:38,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:18:38,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:18:38,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-07 16:18:38,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-07 16:18:38,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-07 16:18:38,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-07 16:18:38,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-07 16:18:38,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-07 16:18:38,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-07 16:18:38,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-07 16:18:38,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-07 16:18:38,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:18:38,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:18:38,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:18:38,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:18:38,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:18:38,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:18:38,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:18:38,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:18:38,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:18:38,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:18:38,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:18:38,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:18:38,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:18:38,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 16:18:38,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 16:18:38,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 16:18:38,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 16:18:38,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 16:18:38,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 16:18:38,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 16:18:38,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 16:18:38,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:18:38,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:18:38,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:18:38,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:18:38,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:18:38,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:18:38,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:18:38,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:18:38,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:18:38,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:18:38,745 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:18:38,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:18:38,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:18:38,746 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:18:38,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:18:38,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:18:38,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:18:38,748 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:18:38,748 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:18:38,748 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:18:38,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:18:38,748 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:18:38,749 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:18:38,749 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:18:38,749 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:18:38,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:18:38,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:18:38,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:18:38,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:18:38,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:18:38,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:18:38,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:18:38,750 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:18:38,751 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:18:38,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:18:38,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:18:38,751 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:18:39,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:18:39,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:18:39,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:18:39,173 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:18:39,173 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:18:39,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2021-10-07 16:18:39,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8988902d/6f2b44c522e746368713340f0e4c27d8/FLAGa0587d3f6 [2021-10-07 16:18:39,922 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:18:39,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2021-10-07 16:18:39,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8988902d/6f2b44c522e746368713340f0e4c27d8/FLAGa0587d3f6 [2021-10-07 16:18:40,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8988902d/6f2b44c522e746368713340f0e4c27d8 [2021-10-07 16:18:40,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:18:40,303 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:18:40,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:18:40,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:18:40,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:18:40,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7dbc1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40, skipping insertion in model container [2021-10-07 16:18:40,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:18:40,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:18:40,546 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/popl20-more-min-le-max.wvr.c[2418,2431] [2021-10-07 16:18:40,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:18:40,573 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:18:40,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:18:40,596 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/popl20-more-min-le-max.wvr.c[2418,2431] [2021-10-07 16:18:40,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:18:40,615 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:18:40,677 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/popl20-more-min-le-max.wvr.c[2418,2431] [2021-10-07 16:18:40,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:18:40,718 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:18:40,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40 WrapperNode [2021-10-07 16:18:40,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:18:40,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:18:40,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:18:40,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:18:40,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:18:40,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:18:40,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:18:40,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:18:40,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:18:40,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:18:40,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:18:40,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:18:40,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (1/1) ... [2021-10-07 16:18:40,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:18:40,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:18:40,940 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) [2021-10-07 16:18:40,960 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 [2021-10-07 16:18:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:18:41,005 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:18:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:18:41,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:18:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:18:41,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:18:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:18:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:18:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 16:18:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 16:18:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:18:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:18:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:18:41,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:18:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:18:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:18:41,010 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:18:42,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:18:42,061 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-07 16:18:42,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:18:42 BoogieIcfgContainer [2021-10-07 16:18:42,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:18:42,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:18:42,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:18:42,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:18:42,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:18:40" (1/3) ... [2021-10-07 16:18:42,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17740e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:18:42, skipping insertion in model container [2021-10-07 16:18:42,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:40" (2/3) ... [2021-10-07 16:18:42,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17740e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:18:42, skipping insertion in model container [2021-10-07 16:18:42,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:18:42" (3/3) ... [2021-10-07 16:18:42,073 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2021-10-07 16:18:42,080 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:18:42,080 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-07 16:18:42,080 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:18:42,129 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,130 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,131 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,132 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,132 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,133 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,133 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,133 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,133 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,134 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,134 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,134 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,134 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,135 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,135 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,135 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,135 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,136 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,136 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,137 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,137 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,137 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,138 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,138 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,139 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,139 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,139 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,140 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,140 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,140 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,140 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,141 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,142 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,142 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,142 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,142 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,143 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,143 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,143 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,143 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,143 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,144 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,144 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,144 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,144 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,145 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,145 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,145 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,146 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,146 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,146 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,146 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,147 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,147 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,147 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,148 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,148 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,149 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,149 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,149 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,149 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,150 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,150 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,150 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,150 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,151 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,151 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,151 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,152 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,156 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,156 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,157 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,157 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,157 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,157 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,160 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,161 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,161 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,161 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,161 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,163 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,165 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,165 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:18:42,171 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:18:42,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:18:42,272 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 [2021-10-07 16:18:42,273 INFO L340 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2021-10-07 16:18:42,296 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:18:42,309 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 163 transitions, 350 flow [2021-10-07 16:18:42,312 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 163 transitions, 350 flow [2021-10-07 16:18:42,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 163 places, 163 transitions, 350 flow [2021-10-07 16:18:42,402 INFO L129 PetriNetUnfolder]: 10/160 cut-off events. [2021-10-07 16:18:42,403 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:18:42,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 160 events. 10/160 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 183 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2021-10-07 16:18:42,414 INFO L116 LiptonReduction]: Number of co-enabled transitions 1742 [2021-10-07 16:19:04,618 INFO L131 LiptonReduction]: Checked pairs total: 2687 [2021-10-07 16:19:04,618 INFO L133 LiptonReduction]: Total number of compositions: 172 [2021-10-07 16:19:04,629 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 53 transitions, 130 flow [2021-10-07 16:19:04,685 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:19:04,698 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:04,698 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:19:04,699 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash 20825, now seen corresponding path program 1 times [2021-10-07 16:19:04,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:04,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055815223] [2021-10-07 16:19:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:04,721 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:04,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:04,726 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) [2021-10-07 16:19:04,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:19:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:04,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 16:19:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:04,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:05,291 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:05,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:05,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:05,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:05,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055815223] [2021-10-07 16:19:05,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055815223] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:05,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:05,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:19:05,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145909328] [2021-10-07 16:19:05,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:05,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:05,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:05,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:05,493 INFO L87 Difference]: Start difference. First operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 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) [2021-10-07 16:19:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:05,726 INFO L93 Difference]: Finished difference Result 383 states and 1118 transitions. [2021-10-07 16:19:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:19:05,728 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 [2021-10-07 16:19:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:05,747 INFO L225 Difference]: With dead ends: 383 [2021-10-07 16:19:05,747 INFO L226 Difference]: Without dead ends: 383 [2021-10-07 16:19:05,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-10-07 16:19:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 380. [2021-10-07 16:19:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 315 states have (on average 3.549206349206349) internal successors, (1118), 379 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1118 transitions. [2021-10-07 16:19:05,840 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1118 transitions. Word has length 2 [2021-10-07 16:19:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:05,841 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1118 transitions. [2021-10-07 16:19:05,841 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) [2021-10-07 16:19:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1118 transitions. [2021-10-07 16:19:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:19:05,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:05,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:19:05,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:06,058 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 [2021-10-07 16:19:06,060 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:06,060 INFO L82 PathProgramCache]: Analyzing trace with hash 20715, now seen corresponding path program 1 times [2021-10-07 16:19:06,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:06,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812954178] [2021-10-07 16:19:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:06,065 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:06,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:06,066 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) [2021-10-07 16:19:06,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:19:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:19:06,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:06,178 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:19:06,178 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 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 16:19:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:06,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:06,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:06,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812954178] [2021-10-07 16:19:06,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812954178] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:06,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:06,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:19:06,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079624537] [2021-10-07 16:19:06,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:19:06,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:19:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:06,247 INFO L87 Difference]: Start difference. First operand 380 states and 1118 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) [2021-10-07 16:19:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:06,407 INFO L93 Difference]: Finished difference Result 378 states and 1114 transitions. [2021-10-07 16:19:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:06,408 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 [2021-10-07 16:19:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:06,415 INFO L225 Difference]: With dead ends: 378 [2021-10-07 16:19:06,415 INFO L226 Difference]: Without dead ends: 378 [2021-10-07 16:19:06,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-10-07 16:19:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-10-07 16:19:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 315 states have (on average 3.5365079365079364) internal successors, (1114), 377 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1114 transitions. [2021-10-07 16:19:06,471 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1114 transitions. Word has length 2 [2021-10-07 16:19:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:06,472 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1114 transitions. [2021-10-07 16:19:06,472 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) [2021-10-07 16:19:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1114 transitions. [2021-10-07 16:19:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:19:06,473 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:06,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:19:06,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:06,684 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 [2021-10-07 16:19:06,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash 20816, now seen corresponding path program 1 times [2021-10-07 16:19:06,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:06,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785256123] [2021-10-07 16:19:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:06,689 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:06,692 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) [2021-10-07 16:19:06,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:19:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 16:19:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:07,070 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:07,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:07,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:07,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:07,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785256123] [2021-10-07 16:19:07,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785256123] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:07,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:07,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:19:07,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983356210] [2021-10-07 16:19:07,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:07,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:07,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:07,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:07,230 INFO L87 Difference]: Start difference. First operand 378 states and 1114 transitions. 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) [2021-10-07 16:19:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:07,393 INFO L93 Difference]: Finished difference Result 377 states and 1112 transitions. [2021-10-07 16:19:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:07,394 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 [2021-10-07 16:19:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:07,399 INFO L225 Difference]: With dead ends: 377 [2021-10-07 16:19:07,400 INFO L226 Difference]: Without dead ends: 377 [2021-10-07 16:19:07,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-10-07 16:19:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-10-07 16:19:07,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 315 states have (on average 3.53015873015873) internal successors, (1112), 376 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1112 transitions. [2021-10-07 16:19:07,420 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1112 transitions. Word has length 2 [2021-10-07 16:19:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:07,421 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1112 transitions. [2021-10-07 16:19:07,421 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) [2021-10-07 16:19:07,421 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1112 transitions. [2021-10-07 16:19:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:19:07,422 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:07,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:19:07,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:07,633 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 [2021-10-07 16:19:07,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash 645351, now seen corresponding path program 1 times [2021-10-07 16:19:07,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:07,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260558279] [2021-10-07 16:19:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:07,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:07,638 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) [2021-10-07 16:19:07,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:19:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:07,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:19:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:07,811 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-07 16:19:07,812 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 6 case distinctions, treesize of input 44 treesize of output 54 [2021-10-07 16:19:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:07,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:08,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:08,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260558279] [2021-10-07 16:19:08,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260558279] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:08,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:08,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:19:08,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114156538] [2021-10-07 16:19:08,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:08,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:08,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:08,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:08,009 INFO L87 Difference]: Start difference. First operand 377 states and 1112 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-10-07 16:19:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:08,155 INFO L93 Difference]: Finished difference Result 326 states and 936 transitions. [2021-10-07 16:19:08,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:08,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-10-07 16:19:08,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:08,160 INFO L225 Difference]: With dead ends: 326 [2021-10-07 16:19:08,160 INFO L226 Difference]: Without dead ends: 326 [2021-10-07 16:19:08,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-10-07 16:19:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2021-10-07 16:19:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 274 states have (on average 3.4160583941605838) internal successors, (936), 325 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 936 transitions. [2021-10-07 16:19:08,174 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 936 transitions. Word has length 3 [2021-10-07 16:19:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:08,175 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 936 transitions. [2021-10-07 16:19:08,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-10-07 16:19:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 936 transitions. [2021-10-07 16:19:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:19:08,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:08,175 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:19:08,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:08,387 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 [2021-10-07 16:19:08,388 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:08,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash 645352, now seen corresponding path program 1 times [2021-10-07 16:19:08,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:08,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148276913] [2021-10-07 16:19:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:08,390 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:08,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:08,392 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) [2021-10-07 16:19:08,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:19:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:08,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:19:08,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:08,848 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:08,849 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 5 case distinctions, treesize of input 49 treesize of output 99 [2021-10-07 16:19:08,865 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 16:19:08,866 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 102 treesize of output 98 [2021-10-07 16:19:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:10,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:10,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:10,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148276913] [2021-10-07 16:19:10,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148276913] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:19:10,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:19:10,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2021-10-07 16:19:10,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550199537] [2021-10-07 16:19:10,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:10,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:10,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:10,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:19:10,813 INFO L87 Difference]: Start difference. First operand 326 states and 936 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:10,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:10,941 INFO L93 Difference]: Finished difference Result 275 states and 760 transitions. [2021-10-07 16:19:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:10,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have 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 [2021-10-07 16:19:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:10,945 INFO L225 Difference]: With dead ends: 275 [2021-10-07 16:19:10,945 INFO L226 Difference]: Without dead ends: 275 [2021-10-07 16:19:10,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:19:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-10-07 16:19:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-10-07 16:19:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 233 states have (on average 3.2618025751072963) internal successors, (760), 274 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 760 transitions. [2021-10-07 16:19:10,957 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 760 transitions. Word has length 3 [2021-10-07 16:19:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:10,958 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 760 transitions. [2021-10-07 16:19:10,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 760 transitions. [2021-10-07 16:19:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:19:10,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:10,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:19:10,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:11,171 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 [2021-10-07 16:19:11,172 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:11,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:11,173 INFO L82 PathProgramCache]: Analyzing trace with hash 645242, now seen corresponding path program 1 times [2021-10-07 16:19:11,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:11,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031044907] [2021-10-07 16:19:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:11,175 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:11,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:11,176 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) [2021-10-07 16:19:11,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:19:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:11,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:19:11,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:11,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:11,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:11,492 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:11,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:11,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:11,921 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:11,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031044907] [2021-10-07 16:19:11,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031044907] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:11,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:11,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-07 16:19:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083724302] [2021-10-07 16:19:11,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:19:11,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:19:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:19:11,924 INFO L87 Difference]: Start difference. First operand 275 states and 760 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) [2021-10-07 16:19:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:12,558 INFO L93 Difference]: Finished difference Result 549 states and 1521 transitions. [2021-10-07 16:19:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:19:12,560 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 [2021-10-07 16:19:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:12,565 INFO L225 Difference]: With dead ends: 549 [2021-10-07 16:19:12,565 INFO L226 Difference]: Without dead ends: 549 [2021-10-07 16:19:12,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-07 16:19:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-10-07 16:19:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 278. [2021-10-07 16:19:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 236 states have (on average 3.2457627118644066) internal successors, (766), 277 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 766 transitions. [2021-10-07 16:19:12,580 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 766 transitions. Word has length 3 [2021-10-07 16:19:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:12,580 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 766 transitions. [2021-10-07 16:19:12,580 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) [2021-10-07 16:19:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 766 transitions. [2021-10-07 16:19:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:19:12,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:12,581 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:19:12,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:12,792 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 [2021-10-07 16:19:12,793 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash 620198586, now seen corresponding path program 1 times [2021-10-07 16:19:12,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:12,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182126529] [2021-10-07 16:19:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:12,796 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:12,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:12,797 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) [2021-10-07 16:19:12,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:19:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:19:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:12,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:12,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:13,205 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:13,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-07 16:19:13,212 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 91 treesize of output 89 [2021-10-07 16:19:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:15,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:16,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:16,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182126529] [2021-10-07 16:19:16,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182126529] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:16,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:16,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:19:16,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95451706] [2021-10-07 16:19:16,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:19:16,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:19:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:19:16,018 INFO L87 Difference]: Start difference. First operand 278 states and 766 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:16,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:16,562 INFO L93 Difference]: Finished difference Result 519 states and 1451 transitions. [2021-10-07 16:19:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:19:16,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have 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 [2021-10-07 16:19:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:16,568 INFO L225 Difference]: With dead ends: 519 [2021-10-07 16:19:16,568 INFO L226 Difference]: Without dead ends: 519 [2021-10-07 16:19:16,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-10-07 16:19:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 263. [2021-10-07 16:19:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 227 states have (on average 3.2202643171806167) internal successors, (731), 262 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 731 transitions. [2021-10-07 16:19:16,582 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 731 transitions. Word has length 5 [2021-10-07 16:19:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:16,582 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 731 transitions. [2021-10-07 16:19:16,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 731 transitions. [2021-10-07 16:19:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:19:16,583 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:16,584 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:19:16,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-07 16:19:16,795 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 [2021-10-07 16:19:16,796 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash 620198587, now seen corresponding path program 1 times [2021-10-07 16:19:16,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:16,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874967134] [2021-10-07 16:19:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:16,799 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:16,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:16,800 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) [2021-10-07 16:19:16,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:19:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:19:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:16,951 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:19:16,952 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 4 case distinctions, treesize of input 33 treesize of output 45 [2021-10-07 16:19:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:17,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:17,175 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:17,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874967134] [2021-10-07 16:19:17,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874967134] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:17,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:17,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:19:17,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001275752] [2021-10-07 16:19:17,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:17,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:17,178 INFO L87 Difference]: Start difference. First operand 263 states and 731 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:17,261 INFO L93 Difference]: Finished difference Result 248 states and 696 transitions. [2021-10-07 16:19:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:17,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have 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 [2021-10-07 16:19:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:17,265 INFO L225 Difference]: With dead ends: 248 [2021-10-07 16:19:17,265 INFO L226 Difference]: Without dead ends: 248 [2021-10-07 16:19:17,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-07 16:19:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-10-07 16:19:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 218 states have (on average 3.1926605504587156) internal successors, (696), 247 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 696 transitions. [2021-10-07 16:19:17,279 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 696 transitions. Word has length 5 [2021-10-07 16:19:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:17,280 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 696 transitions. [2021-10-07 16:19:17,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 696 transitions. [2021-10-07 16:19:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:19:17,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:17,281 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:19:17,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:17,493 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 [2021-10-07 16:19:17,494 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:17,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2046281947, now seen corresponding path program 1 times [2021-10-07 16:19:17,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:17,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837755073] [2021-10-07 16:19:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:17,497 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:17,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:17,498 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) [2021-10-07 16:19:17,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:19:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:19:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:17,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:17,623 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:17,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837755073] [2021-10-07 16:19:17,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837755073] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:17,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:17,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:19:17,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870883591] [2021-10-07 16:19:17,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:19:17,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:17,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:19:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:17,625 INFO L87 Difference]: Start difference. First operand 248 states and 696 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-07 16:19:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:17,701 INFO L93 Difference]: Finished difference Result 170 states and 466 transitions. [2021-10-07 16:19:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 6 [2021-10-07 16:19:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:17,704 INFO L225 Difference]: With dead ends: 170 [2021-10-07 16:19:17,704 INFO L226 Difference]: Without dead ends: 170 [2021-10-07 16:19:17,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-07 16:19:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-07 16:19:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 155 states have (on average 3.0064516129032257) internal successors, (466), 169 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 466 transitions. [2021-10-07 16:19:17,712 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 466 transitions. Word has length 6 [2021-10-07 16:19:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:17,714 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 466 transitions. [2021-10-07 16:19:17,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-10-07 16:19:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 466 transitions. [2021-10-07 16:19:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:19:17,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:17,715 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:19:17,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:17,927 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 [2021-10-07 16:19:17,928 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:17,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2046281948, now seen corresponding path program 1 times [2021-10-07 16:19:17,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:17,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018943850] [2021-10-07 16:19:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:17,929 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:17,931 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) [2021-10-07 16:19:17,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 16:19:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:18,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:19:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:18,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:18,218 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 8 treesize of output 6 [2021-10-07 16:19:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:18,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:18,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018943850] [2021-10-07 16:19:18,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018943850] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:18,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:18,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:19:18,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752134871] [2021-10-07 16:19:18,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:19:18,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:19:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:19:18,258 INFO L87 Difference]: Start difference. First operand 170 states and 466 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) 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) [2021-10-07 16:19:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:18,570 INFO L93 Difference]: Finished difference Result 264 states and 720 transitions. [2021-10-07 16:19:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:19:18,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) 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 [2021-10-07 16:19:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:18,574 INFO L225 Difference]: With dead ends: 264 [2021-10-07 16:19:18,574 INFO L226 Difference]: Without dead ends: 264 [2021-10-07 16:19:18,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-10-07 16:19:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 204. [2021-10-07 16:19:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 189 states have (on average 3.1746031746031744) internal successors, (600), 203 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 600 transitions. [2021-10-07 16:19:18,583 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 600 transitions. Word has length 6 [2021-10-07 16:19:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:18,584 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 600 transitions. [2021-10-07 16:19:18,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) 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) [2021-10-07 16:19:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 600 transitions. [2021-10-07 16:19:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:19:18,585 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:18,585 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1] [2021-10-07 16:19:18,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:18,797 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 [2021-10-07 16:19:18,798 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2045559916, now seen corresponding path program 2 times [2021-10-07 16:19:18,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:18,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022304292] [2021-10-07 16:19:18,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:19:18,800 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:18,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:18,802 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) [2021-10-07 16:19:18,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 16:19:18,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:19:18,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 16:19:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:18,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:19,200 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:19,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:19,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:20,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:20,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022304292] [2021-10-07 16:19:20,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022304292] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:20,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:20,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:19:20,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40510470] [2021-10-07 16:19:20,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:19:20,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:19:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:19:20,509 INFO L87 Difference]: Start difference. First operand 204 states and 600 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) [2021-10-07 16:19:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:23,794 INFO L93 Difference]: Finished difference Result 1589 states and 4735 transitions. [2021-10-07 16:19:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 16:19:23,795 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 [2021-10-07 16:19:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:23,809 INFO L225 Difference]: With dead ends: 1589 [2021-10-07 16:19:23,810 INFO L226 Difference]: Without dead ends: 1589 [2021-10-07 16:19:23,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2358.9ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-10-07 16:19:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 210. [2021-10-07 16:19:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 195 states have (on average 3.1384615384615384) internal successors, (612), 209 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 612 transitions. [2021-10-07 16:19:23,831 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 612 transitions. Word has length 6 [2021-10-07 16:19:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:23,831 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 612 transitions. [2021-10-07 16:19:23,832 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) [2021-10-07 16:19:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 612 transitions. [2021-10-07 16:19:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:19:23,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:23,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:23,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:24,044 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 [2021-10-07 16:19:24,045 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash -989766367, now seen corresponding path program 1 times [2021-10-07 16:19:24,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:24,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204542834] [2021-10-07 16:19:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:24,047 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:24,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:24,049 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) [2021-10-07 16:19:24,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 16:19:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:24,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:19:24,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:24,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:24,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:24,426 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:24,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:24,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:25,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:25,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204542834] [2021-10-07 16:19:25,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204542834] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:25,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:25,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:19:25,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228156855] [2021-10-07 16:19:25,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:19:25,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:19:25,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:25,151 INFO L87 Difference]: Start difference. First operand 210 states and 612 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:26,120 INFO L93 Difference]: Finished difference Result 372 states and 1100 transitions. [2021-10-07 16:19:26,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:19:26,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-10-07 16:19:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:26,124 INFO L225 Difference]: With dead ends: 372 [2021-10-07 16:19:26,124 INFO L226 Difference]: Without dead ends: 372 [2021-10-07 16:19:26,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 825.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:19:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-10-07 16:19:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 312. [2021-10-07 16:19:26,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 297 states have (on average 3.2996632996632997) internal successors, (980), 311 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 980 transitions. [2021-10-07 16:19:26,137 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 980 transitions. Word has length 7 [2021-10-07 16:19:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:26,137 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 980 transitions. [2021-10-07 16:19:26,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 980 transitions. [2021-10-07 16:19:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:19:26,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:26,138 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:26,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:26,350 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 [2021-10-07 16:19:26,351 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:26,352 INFO L82 PathProgramCache]: Analyzing trace with hash -989599662, now seen corresponding path program 1 times [2021-10-07 16:19:26,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:26,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192070234] [2021-10-07 16:19:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:26,354 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:26,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:26,355 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) [2021-10-07 16:19:26,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 16:19:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:19:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:26,547 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:19:26,547 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 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 16:19:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:26,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:26,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:26,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192070234] [2021-10-07 16:19:26,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192070234] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:26,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:26,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:19:26,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457659046] [2021-10-07 16:19:26,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:19:26,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:26,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:19:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:26,612 INFO L87 Difference]: Start difference. First operand 312 states and 980 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-07 16:19:26,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:26,690 INFO L93 Difference]: Finished difference Result 278 states and 869 transitions. [2021-10-07 16:19:26,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:26,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 7 [2021-10-07 16:19:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:26,692 INFO L225 Difference]: With dead ends: 278 [2021-10-07 16:19:26,692 INFO L226 Difference]: Without dead ends: 278 [2021-10-07 16:19:26,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-07 16:19:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-10-07 16:19:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 268 states have (on average 3.2425373134328357) internal successors, (869), 277 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 869 transitions. [2021-10-07 16:19:26,702 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 869 transitions. Word has length 7 [2021-10-07 16:19:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:26,703 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 869 transitions. [2021-10-07 16:19:26,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-07 16:19:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 869 transitions. [2021-10-07 16:19:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:19:26,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:26,704 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:26,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:26,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:26,917 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash -989599661, now seen corresponding path program 1 times [2021-10-07 16:19:26,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:26,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577765682] [2021-10-07 16:19:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:26,919 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:26,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:26,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:26,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 16:19:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:19:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:27,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:27,363 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:27,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:27,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:27,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:27,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577765682] [2021-10-07 16:19:27,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577765682] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:27,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:27,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:19:27,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383385141] [2021-10-07 16:19:27,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:19:27,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:27,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:19:27,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:19:27,987 INFO L87 Difference]: Start difference. First operand 278 states and 869 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:28,363 INFO L93 Difference]: Finished difference Result 475 states and 1493 transitions. [2021-10-07 16:19:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:19:28,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-10-07 16:19:28,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:28,368 INFO L225 Difference]: With dead ends: 475 [2021-10-07 16:19:28,369 INFO L226 Difference]: Without dead ends: 475 [2021-10-07 16:19:28,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-10-07 16:19:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 244. [2021-10-07 16:19:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 3.1715481171548117) internal successors, (758), 243 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 758 transitions. [2021-10-07 16:19:28,380 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 758 transitions. Word has length 7 [2021-10-07 16:19:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:28,380 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 758 transitions. [2021-10-07 16:19:28,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 758 transitions. [2021-10-07 16:19:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:19:28,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:28,381 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:28,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:28,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:28,591 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:28,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:28,591 INFO L82 PathProgramCache]: Analyzing trace with hash -612823258, now seen corresponding path program 1 times [2021-10-07 16:19:28,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:28,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439790401] [2021-10-07 16:19:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:28,593 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:28,595 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) [2021-10-07 16:19:28,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 16:19:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:28,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:19:28,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:28,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:28,971 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 8 treesize of output 6 [2021-10-07 16:19:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:29,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:29,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439790401] [2021-10-07 16:19:29,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439790401] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:29,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:29,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:19:29,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759511358] [2021-10-07 16:19:29,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:19:29,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:29,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:19:29,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:19:29,011 INFO L87 Difference]: Start difference. First operand 244 states and 758 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-10-07 16:19:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:29,240 INFO L93 Difference]: Finished difference Result 354 states and 1110 transitions. [2021-10-07 16:19:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:19:29,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 [2021-10-07 16:19:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:29,245 INFO L225 Difference]: With dead ends: 354 [2021-10-07 16:19:29,245 INFO L226 Difference]: Without dead ends: 354 [2021-10-07 16:19:29,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:29,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-07 16:19:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 296. [2021-10-07 16:19:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 3.374570446735395) internal successors, (982), 295 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 982 transitions. [2021-10-07 16:19:29,257 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 982 transitions. Word has length 8 [2021-10-07 16:19:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:29,257 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 982 transitions. [2021-10-07 16:19:29,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-10-07 16:19:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 982 transitions. [2021-10-07 16:19:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:19:29,259 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:29,259 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:29,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:29,471 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 [2021-10-07 16:19:29,472 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:29,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1817648221, now seen corresponding path program 1 times [2021-10-07 16:19:29,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:29,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113758294] [2021-10-07 16:19:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:29,473 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:29,474 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) [2021-10-07 16:19:29,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 16:19:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:29,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:19:29,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:29,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:29,840 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:29,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:30,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:30,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:30,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113758294] [2021-10-07 16:19:30,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113758294] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:30,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:30,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:19:30,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406626314] [2021-10-07 16:19:30,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:19:30,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:19:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:30,571 INFO L87 Difference]: Start difference. First operand 296 states and 982 transitions. Second operand has 10 states, 9 states have (on average 2.0) 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) [2021-10-07 16:19:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:31,601 INFO L93 Difference]: Finished difference Result 510 states and 1730 transitions. [2021-10-07 16:19:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:19:31,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) 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 9 [2021-10-07 16:19:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:31,607 INFO L225 Difference]: With dead ends: 510 [2021-10-07 16:19:31,607 INFO L226 Difference]: Without dead ends: 510 [2021-10-07 16:19:31,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 850.4ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:19:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-10-07 16:19:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 452. [2021-10-07 16:19:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 447 states have (on average 3.5838926174496644) internal successors, (1602), 451 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1602 transitions. [2021-10-07 16:19:31,624 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1602 transitions. Word has length 9 [2021-10-07 16:19:31,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:31,624 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1602 transitions. [2021-10-07 16:19:31,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) 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) [2021-10-07 16:19:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1602 transitions. [2021-10-07 16:19:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:19:31,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:31,626 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:31,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:31,838 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 [2021-10-07 16:19:31,839 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1176686052, now seen corresponding path program 2 times [2021-10-07 16:19:31,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:31,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059667267] [2021-10-07 16:19:31,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:19:31,841 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:31,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:31,842 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) [2021-10-07 16:19:31,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 16:19:32,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:19:32,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:19:32,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:32,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:32,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:32,305 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:32,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:32,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:34,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:34,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059667267] [2021-10-07 16:19:34,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059667267] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:34,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:34,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:19:34,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091743148] [2021-10-07 16:19:34,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:19:34,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:19:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:19:34,017 INFO L87 Difference]: Start difference. First operand 452 states and 1602 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2021-10-07 16:19:42,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:42,077 INFO L93 Difference]: Finished difference Result 1444 states and 4760 transitions. [2021-10-07 16:19:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:19:42,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 [2021-10-07 16:19:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:42,091 INFO L225 Difference]: With dead ends: 1444 [2021-10-07 16:19:42,091 INFO L226 Difference]: Without dead ends: 1444 [2021-10-07 16:19:42,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4770.5ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:19:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-10-07 16:19:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 754. [2021-10-07 16:19:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 749 states have (on average 3.5380507343124163) internal successors, (2650), 753 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2650 transitions. [2021-10-07 16:19:42,131 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2650 transitions. Word has length 10 [2021-10-07 16:19:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:42,131 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2650 transitions. [2021-10-07 16:19:42,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2021-10-07 16:19:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2650 transitions. [2021-10-07 16:19:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:19:42,134 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:42,134 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:42,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-07 16:19:42,347 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 [2021-10-07 16:19:42,347 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:42,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1393084006, now seen corresponding path program 2 times [2021-10-07 16:19:42,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:42,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661864401] [2021-10-07 16:19:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:19:42,349 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:42,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:42,350 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) [2021-10-07 16:19:42,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 16:19:42,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:19:42,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:19:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:42,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:42,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:42,890 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:42,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:43,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:44,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:44,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661864401] [2021-10-07 16:19:44,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661864401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:44,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:44,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:19:44,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511031050] [2021-10-07 16:19:44,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:19:44,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:44,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:19:44,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:19:44,798 INFO L87 Difference]: Start difference. First operand 754 states and 2650 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:52,551 INFO L93 Difference]: Finished difference Result 1318 states and 4388 transitions. [2021-10-07 16:19:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:19:52,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-10-07 16:19:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:52,561 INFO L225 Difference]: With dead ends: 1318 [2021-10-07 16:19:52,561 INFO L226 Difference]: Without dead ends: 1318 [2021-10-07 16:19:52,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4710.6ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:19:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-10-07 16:19:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 864. [2021-10-07 16:19:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 859 states have (on average 3.4761350407450524) internal successors, (2986), 863 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2986 transitions. [2021-10-07 16:19:52,602 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2986 transitions. Word has length 12 [2021-10-07 16:19:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:52,602 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 2986 transitions. [2021-10-07 16:19:52,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2986 transitions. [2021-10-07 16:19:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:19:52,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:52,604 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2021-10-07 16:19:52,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:52,817 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 [2021-10-07 16:19:52,818 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:52,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1220266989, now seen corresponding path program 3 times [2021-10-07 16:19:52,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:52,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199923362] [2021-10-07 16:19:52,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:19:52,820 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:52,822 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) [2021-10-07 16:19:52,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 16:19:53,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 16:19:53,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:53,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:53,496 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:53,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:53,630 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 13 treesize of output 9 [2021-10-07 16:19:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:19:53,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:19:54,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:54,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199923362] [2021-10-07 16:19:54,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199923362] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:54,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:54,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 16:19:54,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573959643] [2021-10-07 16:19:54,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:19:54,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:19:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:54,126 INFO L87 Difference]: Start difference. First operand 864 states and 2986 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2021-10-07 16:19:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:55,634 INFO L93 Difference]: Finished difference Result 1203 states and 4015 transitions. [2021-10-07 16:19:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 16:19:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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 12 [2021-10-07 16:19:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:55,643 INFO L225 Difference]: With dead ends: 1203 [2021-10-07 16:19:55,643 INFO L226 Difference]: Without dead ends: 1203 [2021-10-07 16:19:55,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 704.1ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:19:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-10-07 16:19:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1077. [2021-10-07 16:19:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1072 states have (on average 3.47294776119403) internal successors, (3723), 1076 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 3723 transitions. [2021-10-07 16:19:55,683 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 3723 transitions. Word has length 12 [2021-10-07 16:19:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:55,683 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 3723 transitions. [2021-10-07 16:19:55,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2021-10-07 16:19:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 3723 transitions. [2021-10-07 16:19:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:19:55,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:55,685 INFO L512 BasicCegarLoop]: trace histogram [10, 1, 1] [2021-10-07 16:19:55,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:55,899 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 [2021-10-07 16:19:55,900 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:19:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:55,901 INFO L82 PathProgramCache]: Analyzing trace with hash -361322068, now seen corresponding path program 3 times [2021-10-07 16:19:55,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:55,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401356601] [2021-10-07 16:19:55,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:19:55,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:55,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:55,904 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) [2021-10-07 16:19:55,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 16:19:56,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-07 16:19:56,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:19:56,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:56,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:56,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:56,429 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:56,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:56,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:00,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:00,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401356601] [2021-10-07 16:20:00,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401356601] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:00,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:00,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:20:00,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141015301] [2021-10-07 16:20:00,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:20:00,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:20:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:20:00,907 INFO L87 Difference]: Start difference. First operand 1077 states and 3723 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:25,682 INFO L93 Difference]: Finished difference Result 8485 states and 30247 transitions. [2021-10-07 16:20:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:20:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-10-07 16:20:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:25,753 INFO L225 Difference]: With dead ends: 8485 [2021-10-07 16:20:25,753 INFO L226 Difference]: Without dead ends: 8485 [2021-10-07 16:20:25,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 21979.5ms TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:20:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8485 states. [2021-10-07 16:20:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8485 to 1089. [2021-10-07 16:20:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1084 states have (on average 3.456642066420664) internal successors, (3747), 1088 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3747 transitions. [2021-10-07 16:20:25,901 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3747 transitions. Word has length 12 [2021-10-07 16:20:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:25,902 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 3747 transitions. [2021-10-07 16:20:25,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3747 transitions. [2021-10-07 16:20:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:20:25,904 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:25,904 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2021-10-07 16:20:25,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:26,118 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 [2021-10-07 16:20:26,118 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:20:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:26,119 INFO L82 PathProgramCache]: Analyzing trace with hash 824975905, now seen corresponding path program 4 times [2021-10-07 16:20:26,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:26,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163463388] [2021-10-07 16:20:26,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:20:26,120 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:26,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:26,122 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:26,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 16:20:26,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:20:26,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:26,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 16:20:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:26,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:26,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:26,612 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:26,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:20:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:27,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:29,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:29,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163463388] [2021-10-07 16:20:29,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163463388] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:29,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:29,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-10-07 16:20:29,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520314773] [2021-10-07 16:20:29,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 16:20:29,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:29,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 16:20:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:20:29,490 INFO L87 Difference]: Start difference. First operand 1089 states and 3747 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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) [2021-10-07 16:20:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:34,302 INFO L93 Difference]: Finished difference Result 1585 states and 5071 transitions. [2021-10-07 16:20:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 16:20:34,303 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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 [2021-10-07 16:20:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:34,311 INFO L225 Difference]: With dead ends: 1585 [2021-10-07 16:20:34,311 INFO L226 Difference]: Without dead ends: 1585 [2021-10-07 16:20:34,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4074.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:20:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-10-07 16:20:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1045. [2021-10-07 16:20:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1040 states have (on average 3.4548076923076922) internal successors, (3593), 1044 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3593 transitions. [2021-10-07 16:20:34,354 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3593 transitions. Word has length 13 [2021-10-07 16:20:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:34,354 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3593 transitions. [2021-10-07 16:20:34,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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) [2021-10-07 16:20:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3593 transitions. [2021-10-07 16:20:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:20:34,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:34,356 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-07 16:20:34,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:34,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:34,570 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:20:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1530375702, now seen corresponding path program 5 times [2021-10-07 16:20:34,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:34,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487271515] [2021-10-07 16:20:34,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:20:34,572 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:34,573 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:34,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 16:20:34,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 16:20:34,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:34,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:20:34,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:34,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:34,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:35,132 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:35,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:20:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:35,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:38,274 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:38,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487271515] [2021-10-07 16:20:38,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487271515] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:38,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:38,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:20:38,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894257466] [2021-10-07 16:20:38,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:20:38,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:20:38,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:20:38,277 INFO L87 Difference]: Start difference. First operand 1045 states and 3593 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2021-10-07 16:21:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:21:00,883 INFO L93 Difference]: Finished difference Result 1877 states and 6103 transitions. [2021-10-07 16:21:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 16:21:00,886 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 [2021-10-07 16:21:00,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:21:00,894 INFO L225 Difference]: With dead ends: 1877 [2021-10-07 16:21:00,894 INFO L226 Difference]: Without dead ends: 1877 [2021-10-07 16:21:00,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 14055.3ms TimeCoverageRelationStatistics Valid=522, Invalid=2234, Unknown=0, NotChecked=0, Total=2756 [2021-10-07 16:21:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-10-07 16:21:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1345. [2021-10-07 16:21:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1340 states have (on average 3.5365671641791043) internal successors, (4739), 1344 states have internal predecessors, (4739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4739 transitions. [2021-10-07 16:21:00,946 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4739 transitions. Word has length 13 [2021-10-07 16:21:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:21:00,946 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4739 transitions. [2021-10-07 16:21:00,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2021-10-07 16:21:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4739 transitions. [2021-10-07 16:21:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:21:00,948 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:21:00,949 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:21:00,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 16:21:01,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:21:01,149 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:21:01,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:21:01,150 INFO L82 PathProgramCache]: Analyzing trace with hash -786044907, now seen corresponding path program 3 times [2021-10-07 16:21:01,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:21:01,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552174739] [2021-10-07 16:21:01,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:21:01,151 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:21:01,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:21:01,152 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) [2021-10-07 16:21:01,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 16:21:01,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 16:21:01,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:21:01,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:21:01,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:21:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:01,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:01,817 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:21:01,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:21:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:02,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:21:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:03,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:21:03,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552174739] [2021-10-07 16:21:03,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552174739] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:21:03,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:21:03,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-07 16:21:03,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897037564] [2021-10-07 16:21:03,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 16:21:03,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:21:03,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 16:21:03,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-10-07 16:21:03,931 INFO L87 Difference]: Start difference. First operand 1345 states and 4739 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:21:14,521 INFO L93 Difference]: Finished difference Result 2512 states and 8106 transitions. [2021-10-07 16:21:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 16:21:14,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 16:21:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:21:14,533 INFO L225 Difference]: With dead ends: 2512 [2021-10-07 16:21:14,533 INFO L226 Difference]: Without dead ends: 2512 [2021-10-07 16:21:14,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 4426.7ms TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:21:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-10-07 16:21:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1814. [2021-10-07 16:21:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1809 states have (on average 3.5986733001658373) internal successors, (6510), 1813 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 6510 transitions. [2021-10-07 16:21:14,600 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 6510 transitions. Word has length 14 [2021-10-07 16:21:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:21:14,601 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 6510 transitions. [2021-10-07 16:21:14,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 6510 transitions. [2021-10-07 16:21:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:21:14,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:21:14,604 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:21:14,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 16:21:14,817 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 [2021-10-07 16:21:14,817 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:21:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:21:14,818 INFO L82 PathProgramCache]: Analyzing trace with hash 799746740, now seen corresponding path program 4 times [2021-10-07 16:21:14,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:21:14,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507918437] [2021-10-07 16:21:14,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:21:14,819 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:21:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:21:14,822 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:21:14,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 16:21:15,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:21:15,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:21:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:21:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:21:15,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:15,440 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:21:15,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:21:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:21:15,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:21:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:21:17,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:21:17,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507918437] [2021-10-07 16:21:17,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507918437] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:21:17,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:21:17,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:21:17,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759081304] [2021-10-07 16:21:17,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:21:17,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:21:17,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:21:17,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:21:17,208 INFO L87 Difference]: Start difference. First operand 1814 states and 6510 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:21:24,524 INFO L93 Difference]: Finished difference Result 3256 states and 10888 transitions. [2021-10-07 16:21:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:21:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 16:21:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:21:24,537 INFO L225 Difference]: With dead ends: 3256 [2021-10-07 16:21:24,538 INFO L226 Difference]: Without dead ends: 3256 [2021-10-07 16:21:24,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 6675.6ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-10-07 16:21:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-10-07 16:21:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 2280. [2021-10-07 16:21:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2275 states have (on average 3.768791208791209) internal successors, (8574), 2279 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 8574 transitions. [2021-10-07 16:21:24,645 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 8574 transitions. Word has length 15 [2021-10-07 16:21:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:21:24,645 INFO L470 AbstractCegarLoop]: Abstraction has 2280 states and 8574 transitions. [2021-10-07 16:21:24,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 8574 transitions. [2021-10-07 16:21:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 16:21:24,650 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:21:24,650 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2021-10-07 16:21:24,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 16:21:24,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:21:24,864 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:21:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:21:24,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1602784950, now seen corresponding path program 6 times [2021-10-07 16:21:24,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:21:24,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655851757] [2021-10-07 16:21:24,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:21:24,867 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:21:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:21:24,868 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) [2021-10-07 16:21:24,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 16:21:25,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:21:25,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:21:25,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 16:21:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:21:25,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:25,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:25,811 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:21:25,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:21:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:26,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:21:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:31,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:21:31,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655851757] [2021-10-07 16:21:31,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655851757] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:21:31,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:21:31,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 16:21:31,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759907618] [2021-10-07 16:21:31,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-07 16:21:31,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:21:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-07 16:21:31,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 16:21:31,612 INFO L87 Difference]: Start difference. First operand 2280 states and 8574 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:21:59,061 INFO L93 Difference]: Finished difference Result 4883 states and 16853 transitions. [2021-10-07 16:21:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-07 16:21:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-07 16:21:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:21:59,077 INFO L225 Difference]: With dead ends: 4883 [2021-10-07 16:21:59,077 INFO L226 Difference]: Without dead ends: 4883 [2021-10-07 16:21:59,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 16124.4ms TimeCoverageRelationStatistics Valid=1051, Invalid=4205, Unknown=0, NotChecked=0, Total=5256 [2021-10-07 16:21:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2021-10-07 16:21:59,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 2487. [2021-10-07 16:21:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2482 states have (on average 3.693392425463336) internal successors, (9167), 2486 states have internal predecessors, (9167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 9167 transitions. [2021-10-07 16:21:59,190 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 9167 transitions. Word has length 19 [2021-10-07 16:21:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:21:59,191 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 9167 transitions. [2021-10-07 16:21:59,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 9167 transitions. [2021-10-07 16:21:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 16:21:59,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:21:59,196 INFO L512 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1] [2021-10-07 16:21:59,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 16:21:59,397 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 [2021-10-07 16:21:59,397 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:21:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:21:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash -867253631, now seen corresponding path program 7 times [2021-10-07 16:21:59,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:21:59,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251530009] [2021-10-07 16:21:59,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:21:59,400 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:21:59,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:21:59,401 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) [2021-10-07 16:21:59,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 16:21:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:21:59,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-07 16:21:59,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:21:59,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:59,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:00,013 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:22:00,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:22:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:22:00,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:22:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:22:07,683 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:07,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251530009] [2021-10-07 16:22:07,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251530009] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:22:07,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:22:07,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 35 [2021-10-07 16:22:07,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86752148] [2021-10-07 16:22:07,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 16:22:07,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:22:07,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 16:22:07,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:22:07,686 INFO L87 Difference]: Start difference. First operand 2487 states and 9167 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:22:47,629 INFO L93 Difference]: Finished difference Result 6605 states and 22947 transitions. [2021-10-07 16:22:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-07 16:22:47,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 16:22:47,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:22:47,654 INFO L225 Difference]: With dead ends: 6605 [2021-10-07 16:22:47,654 INFO L226 Difference]: Without dead ends: 6605 [2021-10-07 16:22:47,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 22597.8ms TimeCoverageRelationStatistics Valid=1004, Invalid=5316, Unknown=0, NotChecked=0, Total=6320 [2021-10-07 16:22:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6605 states. [2021-10-07 16:22:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6605 to 3595. [2021-10-07 16:22:47,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3590 states have (on average 3.7161559888579387) internal successors, (13341), 3594 states have internal predecessors, (13341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 13341 transitions. [2021-10-07 16:22:47,822 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 13341 transitions. Word has length 21 [2021-10-07 16:22:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:22:47,822 INFO L470 AbstractCegarLoop]: Abstraction has 3595 states and 13341 transitions. [2021-10-07 16:22:47,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 13341 transitions. [2021-10-07 16:22:47,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:22:47,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:22:47,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:22:47,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-07 16:22:48,043 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 [2021-10-07 16:22:48,044 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-07 16:22:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:48,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1637149272, now seen corresponding path program 1 times [2021-10-07 16:22:48,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:48,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819817649] [2021-10-07 16:22:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:22:48,047 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:48,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:48,048 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:48,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 16:22:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:22:48,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:22:48,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:48,413 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-07 16:22:48,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 63 treesize of output 19 [2021-10-07 16:22:48,467 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-07 16:22:48,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 170 treesize of output 65 [2021-10-07 16:22:48,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:48,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819817649] [2021-10-07 16:22:48,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-07 16:22:48,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2144356103] [2021-10-07 16:22:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:22:48,941 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-07 16:22:48,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-07 16:22:48,943 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-07 16:22:48,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-10-07 16:22:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:22:49,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:22:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:49,730 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-07 16:22:49,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 63 treesize of output 19 [2021-10-07 16:22:49,786 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-07 16:22:49,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 170 treesize of output 65 [2021-10-07 16:22:50,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-07 16:22:50,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598860017] [2021-10-07 16:22:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:22:50,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 16:22:50,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:22:50,290 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 16:22:50,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-07 16:22:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:22:50,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:22:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:50,994 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 22 treesize of output 20 [2021-10-07 16:22:51,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:51,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2021-10-07 16:22:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:55,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:22:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:55,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:22:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:55,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:22:55,300 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-07 16:22:55,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 129 treesize of output 111 [2021-10-07 16:22:59,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:59,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:59,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:59,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:26:06,222 WARN L207 SmtUtils]: Spent 3.10 m on a formula simplification. DAG size of input: 347 DAG size of output: 126 [2021-10-07 16:26:06,224 INFO L354 Elim1Store]: treesize reduction 1645, result has 21.1 percent of original size [2021-10-07 16:26:06,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 151 treesize of output 515 [2021-10-07 16:31:35,954 WARN L228 Executor]: External (MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-07 16:31:35,955 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 101 [2021-10-07 16:31:35,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-07 16:31:35,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:31:35,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-07 16:31:35,956 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-07 16:31:35,956 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-07 16:31:35,960 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:31:35,963 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:31:35,963 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:31:35,963 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:31:35,963 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:31:35,963 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:31:35,963 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:31:35,964 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:31:35,964 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:31:35,964 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:31:35,964 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:31:35,964 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:31:35,964 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:31:35,965 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:31:35,965 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:31:35,965 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:31:35,965 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:31:35,965 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:31:35,965 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:31:35,965 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:31:35,965 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:31:35,966 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:31:35,966 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:31:35,966 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-07 16:31:35,966 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-07 16:31:35,966 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-07 16:31:35,966 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-07 16:31:35,967 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:31:35,967 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:31:35,967 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:31:35,967 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:31:35,967 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:31:35,967 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:31:35,967 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:31:35,967 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:31:35,968 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:31:35,968 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:31:35,968 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:31:35,968 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:31:35,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-10-07 16:31:36,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-07 16:31:36,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 16:31:36,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:31:36,578 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:31:36,578 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:31:36,582 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) [2021-10-07 16:31:36,588 INFO L168 Benchmark]: Toolchain (without parser) took 776290.37 ms. Allocated memory was 160.4 MB in the beginning and 216.0 MB in the end (delta: 55.6 MB). Free memory was 134.5 MB in the beginning and 48.9 MB in the end (delta: 85.6 MB). Peak memory consumption was 163.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:31:36,588 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 160.4 MB. Free memory was 130.4 MB in the beginning and 130.0 MB in the end (delta: 435.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:31:36,589 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.36 ms. Allocated memory is still 160.4 MB. Free memory was 134.1 MB in the beginning and 121.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:31:36,590 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.38 ms. Allocated memory is still 160.4 MB. Free memory was 121.0 MB in the beginning and 119.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:31:36,590 INFO L168 Benchmark]: Boogie Preprocessor took 80.62 ms. Allocated memory is still 160.4 MB. Free memory was 119.3 MB in the beginning and 117.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:31:36,591 INFO L168 Benchmark]: RCFGBuilder took 1174.58 ms. Allocated memory is still 160.4 MB. Free memory was 117.5 MB in the beginning and 127.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:31:36,596 INFO L168 Benchmark]: TraceAbstraction took 774521.04 ms. Allocated memory was 160.4 MB in the beginning and 216.0 MB in the end (delta: 55.6 MB). Free memory was 126.7 MB in the beginning and 48.9 MB in the end (delta: 77.9 MB). Peak memory consumption was 155.5 MB. Max. memory is 8.0 GB. [2021-10-07 16:31:36,598 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 160.4 MB. Free memory was 130.4 MB in the beginning and 130.0 MB in the end (delta: 435.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 407.36 ms. Allocated memory is still 160.4 MB. Free memory was 134.1 MB in the beginning and 121.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 86.38 ms. Allocated memory is still 160.4 MB. Free memory was 121.0 MB in the beginning and 119.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 80.62 ms. Allocated memory is still 160.4 MB. Free memory was 119.3 MB in the beginning and 117.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1174.58 ms. Allocated memory is still 160.4 MB. Free memory was 117.5 MB in the beginning and 127.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 774521.04 ms. Allocated memory was 160.4 MB in the beginning and 216.0 MB in the end (delta: 55.6 MB). Free memory was 126.7 MB in the beginning and 48.9 MB in the end (delta: 77.9 MB). Peak memory consumption was 155.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 22306.4ms, 163 PlacesBefore, 60 PlacesAfterwards, 163 TransitionsBefore, 53 TransitionsAfterwards, 1742 CoEnabledTransitionPairs, 7 FixpointIterations, 100 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 7 ChoiceCompositions, 172 TotalNumberOfCompositions, 2687 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2342, positive: 2303, positive conditional: 0, positive unconditional: 2303, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 976, positive: 963, positive conditional: 0, positive unconditional: 963, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 976, positive: 963, positive conditional: 0, positive unconditional: 963, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 664, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 664, negative conditional: 0, negative unconditional: 664, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2342, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 976, unknown conditional: 0, unknown unconditional: 976] , Statistics on independence cache: Total cache size (in pairs): 119, Positive cache size: 116, Positive conditional cache size: 0, Positive unconditional cache size: 116, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - 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. Received shutdown request...