/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-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 20:43:32,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 20:43:32,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 20:43:32,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 20:43:32,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 20:43:32,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 20:43:32,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 20:43:32,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 20:43:32,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 20:43:32,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 20:43:32,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 20:43:32,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 20:43:32,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 20:43:32,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 20:43:32,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 20:43:32,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 20:43:32,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 20:43:32,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 20:43:32,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 20:43:32,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 20:43:32,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 20:43:32,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 20:43:32,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 20:43:32,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 20:43:32,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 20:43:32,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 20:43:32,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 20:43:32,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 20:43:32,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 20:43:32,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 20:43:32,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 20:43:32,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 20:43:32,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 20:43:32,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 20:43:32,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 20:43:32,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 20:43:32,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 20:43:32,250 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 20:43:32,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 20:43:32,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 20:43:32,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 20:43:32,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 20:43:32,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 20:43:32,256 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 20:43:32,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 20:43:32,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 20:43:32,257 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 20:43:32,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 20:43:32,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 20:43:32,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 20:43:32,259 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 20:43:32,259 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 20:43:32,259 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 20:43:32,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 20:43:32,260 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 20:43:32,260 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 20:43:32,260 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 20:43:32,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 20:43:32,261 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 20:43:32,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 20:43:32,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 20:43:32,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 20:43:32,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 20:43:32,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 20:43:32,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 20:43:32,262 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 20:43:32,262 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 20:43:32,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 20:43:32,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 20:43:32,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 20:43:32,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 20:43:32,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 20:43:32,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 20:43:32,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 20:43:32,729 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 20:43:32,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2021-10-13 20:43:32,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e38f1a226/94d7ef055ddc4886b471ce01bfed7433/FLAG2a592471b [2021-10-13 20:43:33,464 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 20:43:33,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2021-10-13 20:43:33,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e38f1a226/94d7ef055ddc4886b471ce01bfed7433/FLAG2a592471b [2021-10-13 20:43:33,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e38f1a226/94d7ef055ddc4886b471ce01bfed7433 [2021-10-13 20:43:33,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 20:43:33,849 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 20:43:33,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 20:43:33,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 20:43:33,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 20:43:33,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:43:33" (1/1) ... [2021-10-13 20:43:33,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b1112f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:33, skipping insertion in model container [2021-10-13 20:43:33,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:43:33" (1/1) ... [2021-10-13 20:43:33,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 20:43:33,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 20:43:34,183 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-bad-counter-queue2.wvr.c[2271,2284] [2021-10-13 20:43:34,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 20:43:34,216 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 20:43:34,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 20:43:34,233 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-bad-counter-queue2.wvr.c[2271,2284] [2021-10-13 20:43:34,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 20:43:34,251 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 20:43:34,291 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-bad-counter-queue2.wvr.c[2271,2284] [2021-10-13 20:43:34,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 20:43:34,318 INFO L208 MainTranslator]: Completed translation [2021-10-13 20:43:34,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34 WrapperNode [2021-10-13 20:43:34,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 20:43:34,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 20:43:34,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 20:43:34,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 20:43:34,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 20:43:34,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 20:43:34,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 20:43:34,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 20:43:34,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 20:43:34,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 20:43:34,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 20:43:34,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 20:43:34,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (1/1) ... [2021-10-13 20:43:34,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 20:43:34,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 20:43:34,462 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) [2021-10-13 20:43:34,472 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 [2021-10-13 20:43:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 20:43:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 20:43:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 20:43:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 20:43:34,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 20:43:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 20:43:34,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 20:43:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 20:43:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 20:43:34,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 20:43:34,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 20:43:34,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 20:43:34,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 20:43:34,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 20:43:34,545 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 20:43:35,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 20:43:35,797 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-10-13 20:43:35,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:43:35 BoogieIcfgContainer [2021-10-13 20:43:35,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 20:43:35,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 20:43:35,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 20:43:35,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 20:43:35,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:43:33" (1/3) ... [2021-10-13 20:43:35,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d99c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:43:35, skipping insertion in model container [2021-10-13 20:43:35,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:43:34" (2/3) ... [2021-10-13 20:43:35,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d99c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:43:35, skipping insertion in model container [2021-10-13 20:43:35,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:43:35" (3/3) ... [2021-10-13 20:43:35,808 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2021-10-13 20:43:35,814 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 20:43:35,815 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-13 20:43:35,815 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 20:43:35,851 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,851 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,851 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,851 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,852 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,852 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,852 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,852 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,853 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,853 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,853 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,853 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,854 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,854 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,854 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,854 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,854 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,854 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,854 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,855 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,855 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,855 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,855 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,856 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,856 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,856 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,856 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,856 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,857 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,857 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,857 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,857 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,858 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,858 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,858 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,858 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,858 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,859 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,859 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,859 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,859 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,859 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,860 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,860 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,860 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,860 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,860 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,861 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,861 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,861 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,861 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,861 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,862 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,862 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,862 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,862 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,863 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,863 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,863 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,863 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,863 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,863 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,864 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,864 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,865 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,865 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,865 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,865 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,865 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,865 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,865 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,866 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,866 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,866 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,866 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,866 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,867 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,867 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,868 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,868 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,868 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,871 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,872 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,872 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,872 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,872 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,873 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,873 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,873 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,873 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,873 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,874 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,874 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,874 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,876 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,876 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,877 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,877 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,878 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,878 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,878 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,878 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,878 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,879 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:43:35,884 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 20:43:35,938 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 20:43:35,946 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 [2021-10-13 20:43:35,946 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-13 20:43:35,963 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 20:43:35,975 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 121 transitions, 258 flow [2021-10-13 20:43:35,979 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 121 transitions, 258 flow [2021-10-13 20:43:35,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 119 places, 121 transitions, 258 flow [2021-10-13 20:43:36,031 INFO L129 PetriNetUnfolder]: 9/119 cut-off events. [2021-10-13 20:43:36,032 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 20:43:36,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 119 events. 9/119 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2021-10-13 20:43:36,041 INFO L116 LiptonReduction]: Number of co-enabled transitions 840 [2021-10-13 20:43:52,799 INFO L131 LiptonReduction]: Checked pairs total: 1015 [2021-10-13 20:43:52,800 INFO L133 LiptonReduction]: Total number of compositions: 124 [2021-10-13 20:43:52,811 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 86 flow [2021-10-13 20:43:52,842 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 150 states, 106 states have (on average 3.452830188679245) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 106 states have (on average 3.452830188679245) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 20:43:52,851 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:43:52,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 20:43:52,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:43:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:43:52,858 INFO L82 PathProgramCache]: Analyzing trace with hash 18198, now seen corresponding path program 1 times [2021-10-13 20:43:52,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:43:52,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823356748] [2021-10-13 20:43:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:43:52,873 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:43:52,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:43:52,877 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) [2021-10-13 20:43:52,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 20:43:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:43:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 20:43:52,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:43:53,313 INFO L354 Elim1Store]: treesize reduction 145, result has 24.9 percent of original size [2021-10-13 20:43:53,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 70 [2021-10-13 20:43:53,330 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 71 treesize of output 69 [2021-10-13 20:43:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:53,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:43:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:53,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:43:53,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823356748] [2021-10-13 20:43:53,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823356748] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:43:53,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:43:53,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:43:53,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651183202] [2021-10-13 20:43:53,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:43:53,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:43:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:43:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:43:53,625 INFO L87 Difference]: Start difference. First operand has 150 states, 106 states have (on average 3.452830188679245) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 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) [2021-10-13 20:43:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:43:53,790 INFO L93 Difference]: Finished difference Result 123 states and 289 transitions. [2021-10-13 20:43:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:43:53,794 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 [2021-10-13 20:43:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:43:53,806 INFO L225 Difference]: With dead ends: 123 [2021-10-13 20:43:53,806 INFO L226 Difference]: Without dead ends: 123 [2021-10-13 20:43:53,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:43:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-13 20:43:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-10-13 20:43:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 90 states have (on average 3.2111111111111112) internal successors, (289), 122 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 289 transitions. [2021-10-13 20:43:53,875 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 289 transitions. Word has length 2 [2021-10-13 20:43:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:43:53,876 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 289 transitions. [2021-10-13 20:43:53,877 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) [2021-10-13 20:43:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 289 transitions. [2021-10-13 20:43:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 20:43:53,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:43:53,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 20:43:53,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 20:43:54,089 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 [2021-10-13 20:43:54,090 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:43:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:43:54,092 INFO L82 PathProgramCache]: Analyzing trace with hash 18108, now seen corresponding path program 1 times [2021-10-13 20:43:54,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:43:54,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214212255] [2021-10-13 20:43:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:43:54,094 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:43:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:43:54,095 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) [2021-10-13 20:43:54,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 20:43:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:43:54,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 20:43:54,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:43:54,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:43:54,383 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:43:54,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:43:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:54,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:43:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:54,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:43:54,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214212255] [2021-10-13 20:43:54,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214212255] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:43:54,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:43:54,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:43:54,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347703129] [2021-10-13 20:43:54,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:43:54,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:43:54,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:43:54,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:43:54,638 INFO L87 Difference]: Start difference. First operand 123 states and 289 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) [2021-10-13 20:43:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:43:55,000 INFO L93 Difference]: Finished difference Result 246 states and 580 transitions. [2021-10-13 20:43:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:43:55,006 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 [2021-10-13 20:43:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:43:55,012 INFO L225 Difference]: With dead ends: 246 [2021-10-13 20:43:55,012 INFO L226 Difference]: Without dead ends: 246 [2021-10-13 20:43:55,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:43:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-13 20:43:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 125. [2021-10-13 20:43:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 3.2282608695652173) internal successors, (297), 124 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 297 transitions. [2021-10-13 20:43:55,049 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 297 transitions. Word has length 2 [2021-10-13 20:43:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:43:55,049 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 297 transitions. [2021-10-13 20:43:55,054 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) [2021-10-13 20:43:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 297 transitions. [2021-10-13 20:43:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 20:43:55,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:43:55,055 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 20:43:55,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 20:43:55,271 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 [2021-10-13 20:43:55,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:43:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:43:55,273 INFO L82 PathProgramCache]: Analyzing trace with hash 18109, now seen corresponding path program 1 times [2021-10-13 20:43:55,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:43:55,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660906395] [2021-10-13 20:43:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:43:55,275 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:43:55,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:43:55,277 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) [2021-10-13 20:43:55,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 20:43:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:43:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 20:43:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:43:55,381 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 20:43:55,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-13 20:43:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:55,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:43:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:55,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:43:55,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660906395] [2021-10-13 20:43:55,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660906395] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:43:55,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:43:55,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 20:43:55,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349306875] [2021-10-13 20:43:55,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 20:43:55,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:43:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 20:43:55,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:43:55,417 INFO L87 Difference]: Start difference. First operand 125 states and 297 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) [2021-10-13 20:43:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:43:55,510 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2021-10-13 20:43:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:43:55,511 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 [2021-10-13 20:43:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:43:55,513 INFO L225 Difference]: With dead ends: 124 [2021-10-13 20:43:55,513 INFO L226 Difference]: Without dead ends: 124 [2021-10-13 20:43:55,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:43:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-13 20:43:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-13 20:43:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 123 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 294 transitions. [2021-10-13 20:43:55,525 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 294 transitions. Word has length 2 [2021-10-13 20:43:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:43:55,525 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 294 transitions. [2021-10-13 20:43:55,526 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) [2021-10-13 20:43:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 294 transitions. [2021-10-13 20:43:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 20:43:55,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:43:55,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 20:43:55,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 20:43:55,745 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 [2021-10-13 20:43:55,746 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:43:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:43:55,748 INFO L82 PathProgramCache]: Analyzing trace with hash 18196, now seen corresponding path program 1 times [2021-10-13 20:43:55,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:43:55,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158351017] [2021-10-13 20:43:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:43:55,749 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:43:55,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:43:55,750 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) [2021-10-13 20:43:55,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 20:43:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:43:55,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 20:43:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:43:55,849 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 20:43:55,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 30 [2021-10-13 20:43:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:55,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:43:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:55,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:43:55,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158351017] [2021-10-13 20:43:55,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158351017] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:43:55,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:43:55,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:43:55,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510875942] [2021-10-13 20:43:55,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:43:55,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:43:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:43:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:43:55,907 INFO L87 Difference]: Start difference. First operand 124 states and 294 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) [2021-10-13 20:43:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:43:56,004 INFO L93 Difference]: Finished difference Result 98 states and 216 transitions. [2021-10-13 20:43:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:43:56,006 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 [2021-10-13 20:43:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:43:56,007 INFO L225 Difference]: With dead ends: 98 [2021-10-13 20:43:56,007 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 20:43:56,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:43:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 20:43:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-13 20:43:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 2.8421052631578947) internal successors, (216), 97 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 216 transitions. [2021-10-13 20:43:56,016 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 216 transitions. Word has length 2 [2021-10-13 20:43:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:43:56,017 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 216 transitions. [2021-10-13 20:43:56,017 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) [2021-10-13 20:43:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 216 transitions. [2021-10-13 20:43:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 20:43:56,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:43:56,018 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 20:43:56,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 20:43:56,230 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 [2021-10-13 20:43:56,230 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:43:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:43:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash 17487228, now seen corresponding path program 1 times [2021-10-13 20:43:56,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:43:56,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297164178] [2021-10-13 20:43:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:43:56,234 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:43:56,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:43:56,235 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) [2021-10-13 20:43:56,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 20:43:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:43:56,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 20:43:56,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:43:56,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:43:56,515 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:43:56,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:43:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:56,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:43:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:57,209 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:43:57,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297164178] [2021-10-13 20:43:57,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297164178] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:43:57,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:43:57,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 20:43:57,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409554217] [2021-10-13 20:43:57,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 20:43:57,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:43:57,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 20:43:57,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 20:43:57,212 INFO L87 Difference]: Start difference. First operand 98 states and 216 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:43:58,618 INFO L93 Difference]: Finished difference Result 567 states and 1264 transitions. [2021-10-13 20:43:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 20:43:58,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 20:43:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:43:58,632 INFO L225 Difference]: With dead ends: 567 [2021-10-13 20:43:58,632 INFO L226 Difference]: Without dead ends: 567 [2021-10-13 20:43:58,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 831.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:43:58,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-10-13 20:43:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 102. [2021-10-13 20:43:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 2.8) internal successors, (224), 101 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 224 transitions. [2021-10-13 20:43:58,653 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 224 transitions. Word has length 4 [2021-10-13 20:43:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:43:58,654 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 224 transitions. [2021-10-13 20:43:58,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 224 transitions. [2021-10-13 20:43:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 20:43:58,655 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:43:58,655 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 20:43:58,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 20:43:58,866 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 [2021-10-13 20:43:58,867 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:43:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:43:58,868 INFO L82 PathProgramCache]: Analyzing trace with hash 17500574, now seen corresponding path program 1 times [2021-10-13 20:43:58,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:43:58,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085128478] [2021-10-13 20:43:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:43:58,870 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:43:58,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:43:58,871 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) [2021-10-13 20:43:58,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 20:43:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:43:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 20:43:58,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:43:59,115 INFO L354 Elim1Store]: treesize reduction 149, result has 22.8 percent of original size [2021-10-13 20:43:59,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 63 [2021-10-13 20:43:59,124 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 65 treesize of output 63 [2021-10-13 20:43:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:59,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:43:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:59,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:43:59,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085128478] [2021-10-13 20:43:59,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085128478] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:43:59,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:43:59,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:43:59,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180036157] [2021-10-13 20:43:59,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:43:59,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:43:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:43:59,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:43:59,551 INFO L87 Difference]: Start difference. First operand 102 states and 224 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:43:59,662 INFO L93 Difference]: Finished difference Result 92 states and 204 transitions. [2021-10-13 20:43:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:43:59,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 20:43:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:43:59,664 INFO L225 Difference]: With dead ends: 92 [2021-10-13 20:43:59,664 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 20:43:59,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:43:59,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 20:43:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-13 20:43:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 76 states have (on average 2.6842105263157894) internal successors, (204), 91 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 204 transitions. [2021-10-13 20:43:59,671 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 204 transitions. Word has length 4 [2021-10-13 20:43:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:43:59,671 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 204 transitions. [2021-10-13 20:43:59,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 204 transitions. [2021-10-13 20:43:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 20:43:59,672 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:43:59,673 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 20:43:59,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 20:43:59,884 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 [2021-10-13 20:43:59,885 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:43:59,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:43:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash 17500576, now seen corresponding path program 1 times [2021-10-13 20:43:59,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:43:59,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414346742] [2021-10-13 20:43:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:43:59,888 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:43:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:43:59,890 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) [2021-10-13 20:43:59,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 20:43:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:43:59,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 20:43:59,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:00,017 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 20:44:00,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-13 20:44:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:00,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:00,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:00,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414346742] [2021-10-13 20:44:00,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414346742] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:44:00,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:44:00,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 20:44:00,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084806345] [2021-10-13 20:44:00,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 20:44:00,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 20:44:00,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:44:00,071 INFO L87 Difference]: Start difference. First operand 92 states and 204 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-10-13 20:44:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:00,133 INFO L93 Difference]: Finished difference Result 82 states and 184 transitions. [2021-10-13 20:44:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:44:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 20:44:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:00,135 INFO L225 Difference]: With dead ends: 82 [2021-10-13 20:44:00,136 INFO L226 Difference]: Without dead ends: 82 [2021-10-13 20:44:00,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:44:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-13 20:44:00,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-13 20:44:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 2.5555555555555554) internal successors, (184), 81 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 184 transitions. [2021-10-13 20:44:00,145 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 184 transitions. Word has length 4 [2021-10-13 20:44:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:00,146 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 184 transitions. [2021-10-13 20:44:00,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-10-13 20:44:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 184 transitions. [2021-10-13 20:44:00,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 20:44:00,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:00,147 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 20:44:00,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:00,357 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 [2021-10-13 20:44:00,358 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:00,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:00,359 INFO L82 PathProgramCache]: Analyzing trace with hash 542514193, now seen corresponding path program 1 times [2021-10-13 20:44:00,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:00,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146133077] [2021-10-13 20:44:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:00,360 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:00,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:00,361 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) [2021-10-13 20:44:00,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 20:44:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:00,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 20:44:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:00,463 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 20:44:00,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-13 20:44:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:00,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:00,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:00,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146133077] [2021-10-13 20:44:00,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146133077] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:44:00,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:44:00,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 20:44:00,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860760305] [2021-10-13 20:44:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:44:00,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:44:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:44:00,519 INFO L87 Difference]: Start difference. First operand 82 states and 184 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:00,615 INFO L93 Difference]: Finished difference Result 60 states and 131 transitions. [2021-10-13 20:44:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:44:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have 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 [2021-10-13 20:44:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:00,617 INFO L225 Difference]: With dead ends: 60 [2021-10-13 20:44:00,617 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 20:44:00,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 20:44:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 20:44:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-13 20:44:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 2.381818181818182) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 131 transitions. [2021-10-13 20:44:00,621 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 131 transitions. Word has length 5 [2021-10-13 20:44:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:00,621 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 131 transitions. [2021-10-13 20:44:00,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 131 transitions. [2021-10-13 20:44:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 20:44:00,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:00,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 20:44:00,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:00,823 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 [2021-10-13 20:44:00,824 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash 542514194, now seen corresponding path program 1 times [2021-10-13 20:44:00,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:00,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612589420] [2021-10-13 20:44:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:00,826 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:00,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:00,827 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) [2021-10-13 20:44:00,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 20:44:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 20:44:00,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:00,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:01,130 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:01,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:01,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:01,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:01,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612589420] [2021-10-13 20:44:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612589420] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:44:01,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:44:01,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 20:44:01,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267394793] [2021-10-13 20:44:01,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 20:44:01,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 20:44:01,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 20:44:01,655 INFO L87 Difference]: Start difference. First operand 60 states and 131 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) [2021-10-13 20:44:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:02,099 INFO L93 Difference]: Finished difference Result 100 states and 231 transitions. [2021-10-13 20:44:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 20:44:02,101 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 [2021-10-13 20:44:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:02,102 INFO L225 Difference]: With dead ends: 100 [2021-10-13 20:44:02,103 INFO L226 Difference]: Without dead ends: 100 [2021-10-13 20:44:02,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 20:44:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-13 20:44:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-10-13 20:44:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 2.6533333333333333) internal successors, (199), 79 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2021-10-13 20:44:02,108 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 5 [2021-10-13 20:44:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:02,108 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2021-10-13 20:44:02,109 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) [2021-10-13 20:44:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2021-10-13 20:44:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 20:44:02,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:02,110 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-13 20:44:02,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-13 20:44:02,322 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 [2021-10-13 20:44:02,322 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:02,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1665187762, now seen corresponding path program 1 times [2021-10-13 20:44:02,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:02,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134683252] [2021-10-13 20:44:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:02,325 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:02,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:02,326 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) [2021-10-13 20:44:02,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 20:44:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:02,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 20:44:02,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:02,642 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:02,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:02,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:03,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:03,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134683252] [2021-10-13 20:44:03,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134683252] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:44:03,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:44:03,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 20:44:03,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088481218] [2021-10-13 20:44:03,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 20:44:03,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 20:44:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-13 20:44:03,578 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-10-13 20:44:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:06,356 INFO L93 Difference]: Finished difference Result 262 states and 585 transitions. [2021-10-13 20:44:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 20:44:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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 [2021-10-13 20:44:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:06,361 INFO L225 Difference]: With dead ends: 262 [2021-10-13 20:44:06,361 INFO L226 Difference]: Without dead ends: 262 [2021-10-13 20:44:06,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1377.5ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-13 20:44:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-13 20:44:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 132. [2021-10-13 20:44:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 2.543307086614173) internal successors, (323), 131 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 323 transitions. [2021-10-13 20:44:06,372 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 323 transitions. Word has length 7 [2021-10-13 20:44:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:06,372 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 323 transitions. [2021-10-13 20:44:06,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-10-13 20:44:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 323 transitions. [2021-10-13 20:44:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 20:44:06,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:06,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:44:06,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-13 20:44:06,585 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 [2021-10-13 20:44:06,585 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1668996708, now seen corresponding path program 1 times [2021-10-13 20:44:06,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:06,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839469331] [2021-10-13 20:44:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:06,588 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:06,589 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) [2021-10-13 20:44:06,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 20:44:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:06,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 20:44:06,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:06,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:06,898 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:06,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:07,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:07,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:07,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839469331] [2021-10-13 20:44:07,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839469331] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:44:07,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:44:07,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 20:44:07,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864812931] [2021-10-13 20:44:07,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 20:44:07,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 20:44:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 20:44:07,405 INFO L87 Difference]: Start difference. First operand 132 states and 323 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) [2021-10-13 20:44:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:07,806 INFO L93 Difference]: Finished difference Result 184 states and 479 transitions. [2021-10-13 20:44:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 20:44:07,807 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 [2021-10-13 20:44:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:07,809 INFO L225 Difference]: With dead ends: 184 [2021-10-13 20:44:07,809 INFO L226 Difference]: Without dead ends: 184 [2021-10-13 20:44:07,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 20:44:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-13 20:44:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 164. [2021-10-13 20:44:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 2.79874213836478) internal successors, (445), 163 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 445 transitions. [2021-10-13 20:44:07,820 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 445 transitions. Word has length 7 [2021-10-13 20:44:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:07,821 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 445 transitions. [2021-10-13 20:44:07,821 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) [2021-10-13 20:44:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 445 transitions. [2021-10-13 20:44:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 20:44:07,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:07,823 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 20:44:07,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:08,036 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 [2021-10-13 20:44:08,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash 827450108, now seen corresponding path program 2 times [2021-10-13 20:44:08,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:08,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139717372] [2021-10-13 20:44:08,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:44:08,039 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:08,040 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) [2021-10-13 20:44:08,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 20:44:08,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:44:08,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:44:08,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 20:44:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:08,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:08,410 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:08,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:08,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:10,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:10,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139717372] [2021-10-13 20:44:10,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139717372] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:44:10,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:44:10,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 20:44:10,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842794017] [2021-10-13 20:44:10,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 20:44:10,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 20:44:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 20:44:10,783 INFO L87 Difference]: Start difference. First operand 164 states and 445 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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) [2021-10-13 20:44:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:18,005 INFO L93 Difference]: Finished difference Result 1351 states and 3871 transitions. [2021-10-13 20:44:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 20:44:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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 [2021-10-13 20:44:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:18,019 INFO L225 Difference]: With dead ends: 1351 [2021-10-13 20:44:18,020 INFO L226 Difference]: Without dead ends: 1351 [2021-10-13 20:44:18,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 6195.7ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 20:44:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-10-13 20:44:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 172. [2021-10-13 20:44:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 2.7604790419161676) internal successors, (461), 171 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 461 transitions. [2021-10-13 20:44:18,045 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 461 transitions. Word has length 8 [2021-10-13 20:44:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:18,045 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 461 transitions. [2021-10-13 20:44:18,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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) [2021-10-13 20:44:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 461 transitions. [2021-10-13 20:44:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 20:44:18,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:18,046 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-13 20:44:18,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:18,259 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 [2021-10-13 20:44:18,259 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash 272722162, now seen corresponding path program 1 times [2021-10-13 20:44:18,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:18,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421998862] [2021-10-13 20:44:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:18,262 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:18,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:18,263 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) [2021-10-13 20:44:18,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 20:44:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 20:44:18,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:18,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:18,569 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:18,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 20:44:18,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 20:44:19,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:19,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421998862] [2021-10-13 20:44:19,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421998862] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:44:19,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:44:19,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 20:44:19,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753223974] [2021-10-13 20:44:19,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 20:44:19,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:19,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 20:44:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-13 20:44:19,706 INFO L87 Difference]: Start difference. First operand 172 states and 461 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-10-13 20:44:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:22,024 INFO L93 Difference]: Finished difference Result 396 states and 1043 transitions. [2021-10-13 20:44:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 20:44:22,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 9 [2021-10-13 20:44:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:22,030 INFO L225 Difference]: With dead ends: 396 [2021-10-13 20:44:22,030 INFO L226 Difference]: Without dead ends: 396 [2021-10-13 20:44:22,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2060.4ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-10-13 20:44:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-10-13 20:44:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 199. [2021-10-13 20:44:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 2.979381443298969) internal successors, (578), 198 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 578 transitions. [2021-10-13 20:44:22,041 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 578 transitions. Word has length 9 [2021-10-13 20:44:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:22,041 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 578 transitions. [2021-10-13 20:44:22,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-10-13 20:44:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 578 transitions. [2021-10-13 20:44:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 20:44:22,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:22,043 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:44:22,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:22,255 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 [2021-10-13 20:44:22,256 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:22,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1682335474, now seen corresponding path program 1 times [2021-10-13 20:44:22,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:22,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523583071] [2021-10-13 20:44:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:22,258 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:22,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:22,259 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) [2021-10-13 20:44:22,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 20:44:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:22,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 20:44:22,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:22,616 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:22,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:23,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:23,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:23,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523583071] [2021-10-13 20:44:23,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523583071] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:44:23,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:44:23,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 20:44:23,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567709599] [2021-10-13 20:44:23,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 20:44:23,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:23,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 20:44:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-13 20:44:23,896 INFO L87 Difference]: Start difference. First operand 199 states and 578 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 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) [2021-10-13 20:44:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:25,189 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2021-10-13 20:44:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 20:44:25,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 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 [2021-10-13 20:44:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:25,194 INFO L225 Difference]: With dead ends: 378 [2021-10-13 20:44:25,194 INFO L226 Difference]: Without dead ends: 378 [2021-10-13 20:44:25,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1227.3ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-13 20:44:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-10-13 20:44:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 282. [2021-10-13 20:44:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 3.046931407942238) internal successors, (844), 281 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 844 transitions. [2021-10-13 20:44:25,206 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 844 transitions. Word has length 10 [2021-10-13 20:44:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:25,207 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 844 transitions. [2021-10-13 20:44:25,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 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) [2021-10-13 20:44:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 844 transitions. [2021-10-13 20:44:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 20:44:25,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:25,208 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:44:25,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-13 20:44:25,421 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 [2021-10-13 20:44:25,421 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:25,422 INFO L82 PathProgramCache]: Analyzing trace with hash -541517948, now seen corresponding path program 2 times [2021-10-13 20:44:25,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:25,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186944231] [2021-10-13 20:44:25,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:44:25,424 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:25,425 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) [2021-10-13 20:44:25,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 20:44:25,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:44:25,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:44:25,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 20:44:25,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:25,790 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:25,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 20:44:26,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 20:44:27,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:27,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186944231] [2021-10-13 20:44:27,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186944231] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:44:27,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:44:27,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 20:44:27,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888661420] [2021-10-13 20:44:27,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 20:44:27,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:27,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 20:44:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-13 20:44:27,030 INFO L87 Difference]: Start difference. First operand 282 states and 844 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-10-13 20:44:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:29,328 INFO L93 Difference]: Finished difference Result 494 states and 1433 transitions. [2021-10-13 20:44:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 20:44:29,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 20:44:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:29,334 INFO L225 Difference]: With dead ends: 494 [2021-10-13 20:44:29,335 INFO L226 Difference]: Without dead ends: 494 [2021-10-13 20:44:29,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2097.7ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-10-13 20:44:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-10-13 20:44:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 370. [2021-10-13 20:44:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 3.276712328767123) internal successors, (1196), 369 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1196 transitions. [2021-10-13 20:44:29,351 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1196 transitions. Word has length 11 [2021-10-13 20:44:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:29,351 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1196 transitions. [2021-10-13 20:44:29,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-10-13 20:44:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1196 transitions. [2021-10-13 20:44:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 20:44:29,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:29,353 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-10-13 20:44:29,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-13 20:44:29,566 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 [2021-10-13 20:44:29,567 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:29,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1850663108, now seen corresponding path program 2 times [2021-10-13 20:44:29,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:29,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253348375] [2021-10-13 20:44:29,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:44:29,568 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:29,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:29,569 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) [2021-10-13 20:44:29,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 20:44:29,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:44:29,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:44:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 20:44:29,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:29,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:29,977 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:29,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 20:44:30,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:32,688 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:32,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253348375] [2021-10-13 20:44:32,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253348375] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:44:32,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:44:32,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-13 20:44:32,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912927502] [2021-10-13 20:44:32,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 20:44:32,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:32,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 20:44:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-10-13 20:44:32,690 INFO L87 Difference]: Start difference. First operand 370 states and 1196 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:43,588 INFO L93 Difference]: Finished difference Result 951 states and 2727 transitions. [2021-10-13 20:44:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 20:44:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 20:44:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:43,599 INFO L225 Difference]: With dead ends: 951 [2021-10-13 20:44:43,600 INFO L226 Difference]: Without dead ends: 951 [2021-10-13 20:44:43,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5893.9ms TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 20:44:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-13 20:44:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 369. [2021-10-13 20:44:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 364 states have (on average 3.241758241758242) internal successors, (1180), 368 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1180 transitions. [2021-10-13 20:44:43,624 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1180 transitions. Word has length 12 [2021-10-13 20:44:43,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:43,624 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1180 transitions. [2021-10-13 20:44:43,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1180 transitions. [2021-10-13 20:44:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 20:44:43,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:43,627 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1] [2021-10-13 20:44:43,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:43,841 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 [2021-10-13 20:44:43,842 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1517274865, now seen corresponding path program 3 times [2021-10-13 20:44:43,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:43,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173012968] [2021-10-13 20:44:43,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 20:44:43,844 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:43,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:43,845 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) [2021-10-13 20:44:43,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 20:44:44,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 20:44:44,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:44:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 20:44:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:44,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:44,349 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:44,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 20:44:44,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 20:44:45,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:45,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173012968] [2021-10-13 20:44:45,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173012968] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:44:45,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:44:45,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 20:44:45,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636413374] [2021-10-13 20:44:45,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 20:44:45,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:45,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 20:44:45,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-13 20:44:45,397 INFO L87 Difference]: Start difference. First operand 369 states and 1180 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) [2021-10-13 20:44:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:48,804 INFO L93 Difference]: Finished difference Result 630 states and 1840 transitions. [2021-10-13 20:44:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 20:44:48,805 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 14 [2021-10-13 20:44:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:48,810 INFO L225 Difference]: With dead ends: 630 [2021-10-13 20:44:48,810 INFO L226 Difference]: Without dead ends: 630 [2021-10-13 20:44:48,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1818.0ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-10-13 20:44:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-10-13 20:44:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 454. [2021-10-13 20:44:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 449 states have (on average 3.2984409799554566) internal successors, (1481), 453 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1481 transitions. [2021-10-13 20:44:48,830 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1481 transitions. Word has length 14 [2021-10-13 20:44:48,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:48,830 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1481 transitions. [2021-10-13 20:44:48,830 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) [2021-10-13 20:44:48,830 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1481 transitions. [2021-10-13 20:44:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 20:44:48,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:48,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:44:48,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:49,045 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 [2021-10-13 20:44:49,045 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash 217232250, now seen corresponding path program 1 times [2021-10-13 20:44:49,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:49,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555681094] [2021-10-13 20:44:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:49,047 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:49,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:49,048 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) [2021-10-13 20:44:49,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 20:44:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 20:44:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:49,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:49,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:49,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555681094] [2021-10-13 20:44:49,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555681094] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:44:49,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:44:49,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 20:44:49,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908187587] [2021-10-13 20:44:49,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 20:44:49,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 20:44:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:44:49,301 INFO L87 Difference]: Start difference. First operand 454 states and 1481 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2021-10-13 20:44:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:49,336 INFO L93 Difference]: Finished difference Result 509 states and 1594 transitions. [2021-10-13 20:44:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:44:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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 14 [2021-10-13 20:44:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:49,341 INFO L225 Difference]: With dead ends: 509 [2021-10-13 20:44:49,341 INFO L226 Difference]: Without dead ends: 477 [2021-10-13 20:44:49,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:44:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-10-13 20:44:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2021-10-13 20:44:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 472 states have (on average 3.2245762711864407) internal successors, (1522), 476 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1522 transitions. [2021-10-13 20:44:49,359 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1522 transitions. Word has length 14 [2021-10-13 20:44:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:49,360 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1522 transitions. [2021-10-13 20:44:49,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2021-10-13 20:44:49,360 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1522 transitions. [2021-10-13 20:44:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 20:44:49,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:49,362 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2021-10-13 20:44:49,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:49,575 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 [2021-10-13 20:44:49,575 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:44:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash -143158926, now seen corresponding path program 4 times [2021-10-13 20:44:49,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:49,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919240008] [2021-10-13 20:44:49,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 20:44:49,578 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:49,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:49,579 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) [2021-10-13 20:44:49,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 20:44:49,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 20:44:49,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:44:49,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 20:44:49,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:49,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:50,076 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:44:50,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:44:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:50,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:54,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:54,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919240008] [2021-10-13 20:44:54,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919240008] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:44:54,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:44:54,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-13 20:44:54,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892333756] [2021-10-13 20:44:54,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 20:44:54,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 20:44:54,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-10-13 20:44:54,814 INFO L87 Difference]: Start difference. First operand 477 states and 1522 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:45:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:45:16,263 INFO L93 Difference]: Finished difference Result 2029 states and 5687 transitions. [2021-10-13 20:45:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 20:45:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-10-13 20:45:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:45:16,281 INFO L225 Difference]: With dead ends: 2029 [2021-10-13 20:45:16,281 INFO L226 Difference]: Without dead ends: 2029 [2021-10-13 20:45:16,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 15677.0ms TimeCoverageRelationStatistics Valid=634, Invalid=2788, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 20:45:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-10-13 20:45:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 554. [2021-10-13 20:45:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 549 states have (on average 3.265938069216758) internal successors, (1793), 553 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:45:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1793 transitions. [2021-10-13 20:45:16,338 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1793 transitions. Word has length 15 [2021-10-13 20:45:16,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:45:16,341 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1793 transitions. [2021-10-13 20:45:16,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:45:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1793 transitions. [2021-10-13 20:45:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 20:45:16,342 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:45:16,343 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:45:16,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 20:45:16,556 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 [2021-10-13 20:45:16,556 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:45:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:45:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1442525372, now seen corresponding path program 3 times [2021-10-13 20:45:16,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:45:16,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47909591] [2021-10-13 20:45:16,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 20:45:16,558 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:45:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:45:16,560 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) [2021-10-13 20:45:16,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 20:45:16,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 20:45:16,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:45:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 20:45:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:45:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:45:17,156 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:45:17,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:45:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:45:17,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:45:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:45:21,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:45:21,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47909591] [2021-10-13 20:45:21,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47909591] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:45:21,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:45:21,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-10-13 20:45:21,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851992408] [2021-10-13 20:45:21,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 20:45:21,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:45:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 20:45:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-10-13 20:45:21,073 INFO L87 Difference]: Start difference. First operand 554 states and 1793 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:45:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:45:34,829 INFO L93 Difference]: Finished difference Result 1200 states and 3477 transitions. [2021-10-13 20:45:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 20:45:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-10-13 20:45:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:45:34,840 INFO L225 Difference]: With dead ends: 1200 [2021-10-13 20:45:34,840 INFO L226 Difference]: Without dead ends: 1200 [2021-10-13 20:45:34,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 9774.9ms TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 20:45:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-10-13 20:45:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 662. [2021-10-13 20:45:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 657 states have (on average 3.2207001522070016) internal successors, (2116), 661 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:45:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2116 transitions. [2021-10-13 20:45:34,872 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2116 transitions. Word has length 15 [2021-10-13 20:45:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:45:34,873 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 2116 transitions. [2021-10-13 20:45:34,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:45:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2116 transitions. [2021-10-13 20:45:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:45:34,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:45:34,875 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-13 20:45:34,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 20:45:35,088 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 [2021-10-13 20:45:35,089 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:45:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:45:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash 964148732, now seen corresponding path program 3 times [2021-10-13 20:45:35,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:45:35,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375420682] [2021-10-13 20:45:35,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 20:45:35,091 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:45:35,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:45:35,092 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) [2021-10-13 20:45:35,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 20:45:35,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 20:45:35,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:45:35,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 20:45:35,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:45:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:45:35,880 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:45:35,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:45:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:45:36,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:45:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:45:42,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:45:42,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375420682] [2021-10-13 20:45:42,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375420682] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:45:42,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:45:42,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 20:45:42,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683368382] [2021-10-13 20:45:42,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 20:45:42,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:45:42,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 20:45:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 20:45:42,396 INFO L87 Difference]: Start difference. First operand 662 states and 2116 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:45:53,246 WARN L207 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 20:46:01,408 WARN L207 SmtUtils]: Spent 7.35 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 20:46:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:46:40,548 INFO L93 Difference]: Finished difference Result 7070 states and 23656 transitions. [2021-10-13 20:46:40,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 20:46:40,550 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:46:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:46:40,602 INFO L225 Difference]: With dead ends: 7070 [2021-10-13 20:46:40,602 INFO L226 Difference]: Without dead ends: 7070 [2021-10-13 20:46:40,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 53572.3ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 20:46:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7070 states. [2021-10-13 20:46:40,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7070 to 678. [2021-10-13 20:46:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 673 states have (on average 3.1916790490341755) internal successors, (2148), 677 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2148 transitions. [2021-10-13 20:46:40,732 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2148 transitions. Word has length 16 [2021-10-13 20:46:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:46:40,733 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 2148 transitions. [2021-10-13 20:46:40,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2148 transitions. [2021-10-13 20:46:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:46:40,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:46:40,735 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:46:40,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 20:46:40,950 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 [2021-10-13 20:46:40,951 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:46:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:46:40,952 INFO L82 PathProgramCache]: Analyzing trace with hash -195292575, now seen corresponding path program 1 times [2021-10-13 20:46:40,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:46:40,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486569059] [2021-10-13 20:46:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:46:40,953 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:46:40,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:46:40,954 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) [2021-10-13 20:46:40,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 20:46:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:46:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 20:46:41,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:46:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:46:41,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:46:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:46:41,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:46:41,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486569059] [2021-10-13 20:46:41,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486569059] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:46:41,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:46:41,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 20:46:41,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849552929] [2021-10-13 20:46:41,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 20:46:41,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:46:41,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 20:46:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:46:41,469 INFO L87 Difference]: Start difference. First operand 678 states and 2148 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:46:41,762 INFO L93 Difference]: Finished difference Result 680 states and 2113 transitions. [2021-10-13 20:46:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 20:46:41,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:46:41,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:46:41,765 INFO L225 Difference]: With dead ends: 680 [2021-10-13 20:46:41,765 INFO L226 Difference]: Without dead ends: 680 [2021-10-13 20:46:41,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-10-13 20:46:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-10-13 20:46:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 640. [2021-10-13 20:46:41,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 635 states have (on average 3.220472440944882) internal successors, (2045), 639 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2045 transitions. [2021-10-13 20:46:41,786 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2045 transitions. Word has length 16 [2021-10-13 20:46:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:46:41,786 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 2045 transitions. [2021-10-13 20:46:41,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2045 transitions. [2021-10-13 20:46:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:46:41,788 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:46:41,788 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:46:41,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 20:46:42,002 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 [2021-10-13 20:46:42,003 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:46:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:46:42,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1370997941, now seen corresponding path program 1 times [2021-10-13 20:46:42,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:46:42,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970673316] [2021-10-13 20:46:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:46:42,006 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:46:42,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:46:42,007 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) [2021-10-13 20:46:42,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 20:46:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:46:42,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 20:46:42,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:46:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:46:42,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:46:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:46:42,554 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:46:42,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970673316] [2021-10-13 20:46:42,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970673316] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:46:42,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:46:42,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 20:46:42,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401697974] [2021-10-13 20:46:42,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 20:46:42,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:46:42,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 20:46:42,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:46:42,556 INFO L87 Difference]: Start difference. First operand 640 states and 2045 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:46:42,848 INFO L93 Difference]: Finished difference Result 678 states and 2075 transitions. [2021-10-13 20:46:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 20:46:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:46:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:46:42,851 INFO L225 Difference]: With dead ends: 678 [2021-10-13 20:46:42,851 INFO L226 Difference]: Without dead ends: 678 [2021-10-13 20:46:42,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-10-13 20:46:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-10-13 20:46:42,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 664. [2021-10-13 20:46:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 659 states have (on average 3.118361153262519) internal successors, (2055), 663 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2055 transitions. [2021-10-13 20:46:42,871 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2055 transitions. Word has length 16 [2021-10-13 20:46:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:46:42,871 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 2055 transitions. [2021-10-13 20:46:42,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2055 transitions. [2021-10-13 20:46:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 20:46:42,873 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:46:42,873 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2021-10-13 20:46:42,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 20:46:43,079 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 [2021-10-13 20:46:43,079 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:46:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:46:43,080 INFO L82 PathProgramCache]: Analyzing trace with hash -488965454, now seen corresponding path program 5 times [2021-10-13 20:46:43,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:46:43,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485030235] [2021-10-13 20:46:43,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 20:46:43,080 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:46:43,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:46:43,081 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) [2021-10-13 20:46:43,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 20:46:43,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 20:46:43,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:46:43,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 20:46:43,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:46:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:46:43,691 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:46:43,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:46:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:44,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:46:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:50,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:46:50,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485030235] [2021-10-13 20:46:50,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485030235] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:46:50,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:46:50,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 20:46:50,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10475062] [2021-10-13 20:46:50,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 20:46:50,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:46:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 20:46:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-10-13 20:46:50,220 INFO L87 Difference]: Start difference. First operand 664 states and 2055 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:48:00,126 INFO L93 Difference]: Finished difference Result 1847 states and 5187 transitions. [2021-10-13 20:48:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-13 20:48:00,129 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 20:48:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:48:00,134 INFO L225 Difference]: With dead ends: 1847 [2021-10-13 20:48:00,135 INFO L226 Difference]: Without dead ends: 1847 [2021-10-13 20:48:00,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 44855.9ms TimeCoverageRelationStatistics Valid=1140, Invalid=7049, Unknown=1, NotChecked=0, Total=8190 [2021-10-13 20:48:00,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-10-13 20:48:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 824. [2021-10-13 20:48:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 819 states have (on average 3.1343101343101343) internal successors, (2567), 823 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2567 transitions. [2021-10-13 20:48:00,173 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2567 transitions. Word has length 17 [2021-10-13 20:48:00,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:48:00,174 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2567 transitions. [2021-10-13 20:48:00,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2567 transitions. [2021-10-13 20:48:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 20:48:00,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:48:00,176 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1] [2021-10-13 20:48:00,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 20:48:00,389 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 [2021-10-13 20:48:00,390 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:48:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:48:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1283263035, now seen corresponding path program 6 times [2021-10-13 20:48:00,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:48:00,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987089443] [2021-10-13 20:48:00,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 20:48:00,392 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:48:00,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:48:00,393 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) [2021-10-13 20:48:00,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 20:48:00,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 20:48:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:48:00,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 20:48:00,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:48:00,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:48:01,090 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:48:01,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:48:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:48:02,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:48:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:48:07,274 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:48:07,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987089443] [2021-10-13 20:48:07,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987089443] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:48:07,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:48:07,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 20:48:07,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011930792] [2021-10-13 20:48:07,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 20:48:07,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:48:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 20:48:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-10-13 20:48:07,277 INFO L87 Difference]: Start difference. First operand 824 states and 2567 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:48:36,904 INFO L93 Difference]: Finished difference Result 2254 states and 6466 transitions. [2021-10-13 20:48:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-13 20:48:36,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 20:48:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:48:36,913 INFO L225 Difference]: With dead ends: 2254 [2021-10-13 20:48:36,913 INFO L226 Difference]: Without dead ends: 2254 [2021-10-13 20:48:36,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 22099.1ms TimeCoverageRelationStatistics Valid=895, Invalid=4361, Unknown=0, NotChecked=0, Total=5256 [2021-10-13 20:48:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-10-13 20:48:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 784. [2021-10-13 20:48:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 779 states have (on average 3.1296534017971758) internal successors, (2438), 783 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2438 transitions. [2021-10-13 20:48:36,954 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2438 transitions. Word has length 17 [2021-10-13 20:48:36,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:48:36,954 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2438 transitions. [2021-10-13 20:48:36,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:36,955 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2438 transitions. [2021-10-13 20:48:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 20:48:36,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:48:36,957 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:48:36,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 20:48:37,170 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 [2021-10-13 20:48:37,170 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:48:37,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:48:37,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1386049145, now seen corresponding path program 4 times [2021-10-13 20:48:37,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:48:37,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245353082] [2021-10-13 20:48:37,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 20:48:37,172 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:48:37,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:48:37,173 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) [2021-10-13 20:48:37,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 20:48:37,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 20:48:37,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:48:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 20:48:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:48:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:48:37,746 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 20:48:37,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 20:48:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 20:48:38,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:48:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:48:42,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:48:42,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245353082] [2021-10-13 20:48:42,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245353082] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:48:42,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:48:42,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 23 [2021-10-13 20:48:42,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573577092] [2021-10-13 20:48:42,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 20:48:42,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:48:42,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 20:48:42,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-10-13 20:48:42,500 INFO L87 Difference]: Start difference. First operand 784 states and 2438 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:48:48,151 INFO L93 Difference]: Finished difference Result 997 states and 2921 transitions. [2021-10-13 20:48:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 20:48:48,153 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 20:48:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:48:48,156 INFO L225 Difference]: With dead ends: 997 [2021-10-13 20:48:48,156 INFO L226 Difference]: Without dead ends: 997 [2021-10-13 20:48:48,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 6043.3ms TimeCoverageRelationStatistics Valid=261, Invalid=1221, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 20:48:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-13 20:48:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 863. [2021-10-13 20:48:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 858 states have (on average 3.114219114219114) internal successors, (2672), 862 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2672 transitions. [2021-10-13 20:48:48,194 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2672 transitions. Word has length 17 [2021-10-13 20:48:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:48:48,194 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2672 transitions. [2021-10-13 20:48:48,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2672 transitions. [2021-10-13 20:48:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 20:48:48,199 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:48:48,199 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:48:48,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 20:48:48,412 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 [2021-10-13 20:48:48,412 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:48:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:48:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash 417205564, now seen corresponding path program 1 times [2021-10-13 20:48:48,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:48:48,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383686617] [2021-10-13 20:48:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:48:48,415 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:48:48,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:48:48,416 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) [2021-10-13 20:48:48,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 20:48:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:48:48,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 20:48:48,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:48:48,934 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 20:48:48,934 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 156 treesize of output 46 [2021-10-13 20:48:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:48:48,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:48:49,459 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-13 20:48:49,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 187 treesize of output 91 [2021-10-13 20:48:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:48:57,283 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:48:57,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383686617] [2021-10-13 20:48:57,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383686617] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:48:57,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:48:57,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 20:48:57,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664501366] [2021-10-13 20:48:57,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 20:48:57,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:48:57,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 20:48:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 20:48:57,285 INFO L87 Difference]: Start difference. First operand 863 states and 2672 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:48:58,021 INFO L93 Difference]: Finished difference Result 1004 states and 3009 transitions. [2021-10-13 20:48:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 20:48:58,022 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 20:48:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:48:58,027 INFO L225 Difference]: With dead ends: 1004 [2021-10-13 20:48:58,027 INFO L226 Difference]: Without dead ends: 977 [2021-10-13 20:48:58,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 20:48:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-10-13 20:48:58,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 920. [2021-10-13 20:48:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 915 states have (on average 3.0830601092896175) internal successors, (2821), 919 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2821 transitions. [2021-10-13 20:48:58,052 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2821 transitions. Word has length 17 [2021-10-13 20:48:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:48:58,054 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 2821 transitions. [2021-10-13 20:48:58,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2821 transitions. [2021-10-13 20:48:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 20:48:58,056 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:48:58,056 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:48:58,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-10-13 20:48:58,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:48:58,270 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:48:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:48:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2097951766, now seen corresponding path program 2 times [2021-10-13 20:48:58,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:48:58,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372906501] [2021-10-13 20:48:58,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:48:58,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:48:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:48:58,274 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:48:58,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 20:48:58,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:48:58,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:48:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 20:48:58,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:48:58,924 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 20:48:58,924 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 128 treesize of output 40 [2021-10-13 20:48:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:48:58,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:48:59,271 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-13 20:48:59,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2021-10-13 20:49:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:49:18,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:49:18,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372906501] [2021-10-13 20:49:18,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372906501] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:49:18,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:49:18,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 20:49:18,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080621847] [2021-10-13 20:49:18,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 20:49:18,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:49:18,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 20:49:18,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 20:49:18,444 INFO L87 Difference]: Start difference. First operand 920 states and 2821 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:49:19,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:49:19,083 INFO L93 Difference]: Finished difference Result 997 states and 3019 transitions. [2021-10-13 20:49:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 20:49:19,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 20:49:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:49:19,089 INFO L225 Difference]: With dead ends: 997 [2021-10-13 20:49:19,089 INFO L226 Difference]: Without dead ends: 980 [2021-10-13 20:49:19,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 20:49:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-10-13 20:49:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 944. [2021-10-13 20:49:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 939 states have (on average 3.0681576144834932) internal successors, (2881), 943 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:49:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2881 transitions. [2021-10-13 20:49:19,117 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2881 transitions. Word has length 17 [2021-10-13 20:49:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:49:19,118 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 2881 transitions. [2021-10-13 20:49:19,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:49:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2881 transitions. [2021-10-13 20:49:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 20:49:19,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:49:19,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:49:19,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-13 20:49:19,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:49:19,334 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:49:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:49:19,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1302570808, now seen corresponding path program 3 times [2021-10-13 20:49:19,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:49:19,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196263882] [2021-10-13 20:49:19,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 20:49:19,336 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:49:19,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:49:19,338 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:49:19,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 20:49:19,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 20:49:19,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:49:19,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 20:49:19,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:49:19,927 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 20:49:19,927 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 156 treesize of output 46 [2021-10-13 20:49:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:49:19,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:49:20,249 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-13 20:49:20,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 99 [2021-10-13 20:49:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:49:34,424 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:49:34,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196263882] [2021-10-13 20:49:34,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196263882] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:49:34,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:49:34,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 20:49:34,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900597257] [2021-10-13 20:49:34,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 20:49:34,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:49:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 20:49:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 20:49:34,426 INFO L87 Difference]: Start difference. First operand 944 states and 2881 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-10-13 20:49:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:49:34,917 INFO L93 Difference]: Finished difference Result 1017 states and 3065 transitions. [2021-10-13 20:49:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 20:49:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 17 [2021-10-13 20:49:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:49:34,922 INFO L225 Difference]: With dead ends: 1017 [2021-10-13 20:49:34,922 INFO L226 Difference]: Without dead ends: 993 [2021-10-13 20:49:34,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 20:49:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-10-13 20:49:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 939. [2021-10-13 20:49:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 934 states have (on average 3.0728051391862956) internal successors, (2870), 938 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:49:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2870 transitions. [2021-10-13 20:49:34,944 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2870 transitions. Word has length 17 [2021-10-13 20:49:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:49:34,944 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 2870 transitions. [2021-10-13 20:49:34,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-10-13 20:49:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2870 transitions. [2021-10-13 20:49:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 20:49:34,946 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:49:34,947 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:49:34,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 20:49:35,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:49:35,161 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 20:49:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:49:35,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1482515990, now seen corresponding path program 4 times [2021-10-13 20:49:35,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:49:35,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884089476] [2021-10-13 20:49:35,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 20:49:35,163 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:49:35,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:49:35,165 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:49:35,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-13 20:49:35,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 20:49:35,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:49:35,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 20:49:35,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:49:35,620 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 15 treesize of output 13 [2021-10-13 20:49:35,750 INFO L354 Elim1Store]: treesize reduction 163, result has 15.1 percent of original size [2021-10-13 20:49:35,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 43 [2021-10-13 20:49:42,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:49:42,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:49:42,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:49:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:49:42,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:49:42,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:52:48,653 WARN L207 SmtUtils]: Spent 3.11 m on a formula simplification. DAG size of input: 347 DAG size of output: 126 [2021-10-13 20:52:48,655 INFO L354 Elim1Store]: treesize reduction 1645, result has 21.1 percent of original size [2021-10-13 20:52:48,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 108 treesize of output 484 Received shutdown request... [2021-10-13 20:57:40,702 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 20:57:40,702 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 20:57:41,688 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 20:57:41,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-13 20:57:41,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:57:41,895 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. [2021-10-13 20:57:41,902 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 20:57:41,905 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 20:57:41,906 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 20:57:41,906 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-13 20:57:41,913 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 20:57:41,913 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 20:57:41,913 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 20:57:41,914 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 20:57:41,914 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 20:57:41,914 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 20:57:41,914 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 20:57:41,914 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 20:57:41,915 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 20:57:41,915 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 20:57:41,915 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 20:57:41,915 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 20:57:41,915 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 20:57:41,916 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 20:57:41,919 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 20:57:41,919 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 20:57:41,919 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 20:57:41,920 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 20:57:41,931 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 20:57:41,931 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 20:57:41,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:57:41 BasicIcfg [2021-10-13 20:57:41,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 20:57:41,939 INFO L168 Benchmark]: Toolchain (without parser) took 848095.51 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.2 MB in the beginning and 79.6 MB in the end (delta: 45.6 MB). Peak memory consumption was 117.1 MB. Max. memory is 8.0 GB. [2021-10-13 20:57:41,940 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 20:57:41,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 465.77 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 112.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-13 20:57:41,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.61 ms. Allocated memory is still 151.0 MB. Free memory was 111.9 MB in the beginning and 110.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 20:57:41,946 INFO L168 Benchmark]: Boogie Preprocessor took 39.34 ms. Allocated memory is still 151.0 MB. Free memory was 110.0 MB in the beginning and 108.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 20:57:41,947 INFO L168 Benchmark]: RCFGBuilder took 1382.67 ms. Allocated memory is still 151.0 MB. Free memory was 108.3 MB in the beginning and 114.0 MB in the end (delta: -5.7 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-10-13 20:57:41,947 INFO L168 Benchmark]: TraceAbstraction took 846136.90 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 113.5 MB in the beginning and 79.6 MB in the end (delta: 33.9 MB). Peak memory consumption was 106.3 MB. Max. memory is 8.0 GB. [2021-10-13 20:57:41,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 465.77 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 112.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 55.61 ms. Allocated memory is still 151.0 MB. Free memory was 111.9 MB in the beginning and 110.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.34 ms. Allocated memory is still 151.0 MB. Free memory was 110.0 MB in the beginning and 108.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1382.67 ms. Allocated memory is still 151.0 MB. Free memory was 108.3 MB in the beginning and 114.0 MB in the end (delta: -5.7 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 846136.90 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 113.5 MB in the beginning and 79.6 MB in the end (delta: 33.9 MB). Peak memory consumption was 106.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 16821.0ms, 119 PlacesBefore, 39 PlacesAfterwards, 121 TransitionsBefore, 35 TransitionsAfterwards, 840 CoEnabledTransitionPairs, 6 FixpointIterations, 75 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 124 TotalNumberOfCompositions, 1015 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 980, positive: 969, positive conditional: 0, positive unconditional: 969, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 483, positive: 479, positive conditional: 0, positive unconditional: 479, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 483, positive: 479, positive conditional: 0, positive unconditional: 479, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 484, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 484, negative conditional: 0, negative unconditional: 484, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 980, positive: 490, positive conditional: 0, positive unconditional: 490, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 483, unknown conditional: 0, unknown unconditional: 483] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 45, Positive conditional cache size: 0, Positive unconditional cache size: 45, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-21-5-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 137 locations, 22 error locations. Started 1 CEGAR loops. OverallTime: 845988.8ms, OverallIterations: 30, TraceHistogramMax: 14, EmptinessCheckTime: 49.8ms, AutomataDifference: 234792.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16895.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1225 SDtfs, 13151 SDslu, 10299 SDs, 0 SdLazy, 15926 SolverSat, 821 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85706.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 798 GetRequests, 231 SyntacticMatches, 6 SemanticMatches, 561 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4807 ImplicationChecksByTransitivity, 175775.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=944occurred in iteration=28, InterpolantAutomatonStates: 411, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 726.3ms AutomataMinimizationTime, 29 MinimizatonAttempts, 14343 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 253.4ms SsaConstructionTime, 2823.2ms SatisfiabilityAnalysisTime, 94112.3ms InterpolantComputationTime, 302 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 546 ConstructedInterpolants, 72 QuantifiedInterpolants, 11711 SizeOfPredicates, 284 NumberOfNonLiveVariables, 2819 ConjunctsInSsa, 441 ConjunctsInUnsatCore, 58 InterpolantComputations, 20 PerfectInterpolantSequences, 143/776 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown