/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/unroll-cond-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:44:39,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:44:39,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:44:39,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 16:44:39,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:44:39,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:44:39,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:44:39,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:44:39,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:44:39,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:44:39,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:44:39,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:44:39,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:44:39,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:44:39,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:44:39,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:44:39,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:44:39,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 16:44:39,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 16:44:39,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 16:44:39,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 16:44:39,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 16:44:39,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 16:44:39,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 16:44:39,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 16:44:39,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:44:39,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:44:39,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:44:39,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:44:39,658 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:44:39,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:44:39,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:44:39,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:44:39,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:44:39,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:44:39,663 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:44:39,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:44:39,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:44:39,664 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:44:39,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:44:39,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:44:39,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:44:39,666 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:44:39,666 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:44:39,666 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:44:39,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:44:39,667 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:44:39,667 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:44:39,667 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:44:39,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:44:39,667 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:44:39,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:44:39,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:44:39,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:44:39,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:44:39,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:44:39,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:44:39,681 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:44:39,681 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:44:39,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:44:39,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:44:39,682 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:44:40,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:44:40,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:44:40,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:44:40,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:44:40,130 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:44:40,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-10-07 16:44:40,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e022ce609/675af26a0a044c5daa83f8073ec6e256/FLAG0aac5222f [2021-10-07 16:44:40,777 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:44:40,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-10-07 16:44:40,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e022ce609/675af26a0a044c5daa83f8073ec6e256/FLAG0aac5222f [2021-10-07 16:44:41,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e022ce609/675af26a0a044c5daa83f8073ec6e256 [2021-10-07 16:44:41,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:44:41,152 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:44:41,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:44:41,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:44:41,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:44:41,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b9cff76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41, skipping insertion in model container [2021-10-07 16:44:41,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:44:41,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:44:41,396 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/unroll-cond-2.wvr.c[2533,2546] [2021-10-07 16:44:41,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:44:41,420 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:44:41,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:44:41,440 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/unroll-cond-2.wvr.c[2533,2546] [2021-10-07 16:44:41,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:44:41,462 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:44:41,518 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/unroll-cond-2.wvr.c[2533,2546] [2021-10-07 16:44:41,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:44:41,560 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:44:41,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41 WrapperNode [2021-10-07 16:44:41,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:44:41,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:44:41,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:44:41,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:44:41,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:44:41,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:44:41,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:44:41,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:44:41,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:44:41,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:44:41,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:44:41,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:44:41,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (1/1) ... [2021-10-07 16:44:41,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:44:41,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:44:41,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 16:44:41,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 16:44:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:44:41,842 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:44:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:44:41,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:44:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:44:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:44:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 16:44:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 16:44:41,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:44:41,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:44:41,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:44:41,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:44:41,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:44:41,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:44:41,846 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:44:42,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:44:42,974 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-07 16:44:42,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:44:42 BoogieIcfgContainer [2021-10-07 16:44:42,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:44:42,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:44:42,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:44:42,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:44:42,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:44:41" (1/3) ... [2021-10-07 16:44:42,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785e84c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:44:42, skipping insertion in model container [2021-10-07 16:44:42,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:44:41" (2/3) ... [2021-10-07 16:44:42,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785e84c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:44:42, skipping insertion in model container [2021-10-07 16:44:42,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:44:42" (3/3) ... [2021-10-07 16:44:42,987 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2021-10-07 16:44:42,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:44:42,993 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-07 16:44:42,994 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:44:43,062 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,063 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,063 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,063 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,064 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,065 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,065 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,065 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,066 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,068 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,068 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,068 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,068 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,068 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,069 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,069 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,069 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,069 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,069 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,069 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,070 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,071 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,071 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,071 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,072 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,072 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,073 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,073 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,073 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,074 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,074 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,074 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,074 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,074 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,075 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,075 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,075 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,075 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,077 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,077 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,077 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,077 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,078 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,078 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,078 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,078 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,079 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,079 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,079 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,079 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,080 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,080 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,080 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,080 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,081 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,081 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,082 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,082 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,082 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,082 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,087 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,087 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,088 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,088 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,088 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,088 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,089 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,089 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,089 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,089 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,093 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:44:43,099 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-07 16:44:43,176 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:44:43,184 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 16:44:43,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2021-10-07 16:44:43,207 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:44:43,219 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 137 transitions, 290 flow [2021-10-07 16:44:43,222 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 137 transitions, 290 flow [2021-10-07 16:44:43,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions, 290 flow [2021-10-07 16:44:43,281 INFO L129 PetriNetUnfolder]: 11/135 cut-off events. [2021-10-07 16:44:43,281 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-07 16:44:43,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 135 events. 11/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 153 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2021-10-07 16:44:43,289 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2021-10-07 16:45:02,999 INFO L131 LiptonReduction]: Checked pairs total: 1551 [2021-10-07 16:45:02,999 INFO L133 LiptonReduction]: Total number of compositions: 154 [2021-10-07 16:45:03,011 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 37 transitions, 90 flow [2021-10-07 16:45:03,033 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 186 states, 98 states have (on average 4.683673469387755) internal successors, (459), 185 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 98 states have (on average 4.683673469387755) internal successors, (459), 185 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:03,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:45:03,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:45:03,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:45:03,043 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-07 16:45:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:45:03,048 INFO L82 PathProgramCache]: Analyzing trace with hash 19808, now seen corresponding path program 1 times [2021-10-07 16:45:03,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:45:03,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93380233] [2021-10-07 16:45:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:45:03,063 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:45:03,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:45:03,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:45:03,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:45:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:45:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:45:03,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:45:03,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:45:03,536 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 16:45:03,538 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 [2021-10-07 16:45:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:03,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:45:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:03,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:45:03,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93380233] [2021-10-07 16:45:03,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93380233] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:45:03,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:45:03,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:45:03,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196455923] [2021-10-07 16:45:03,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:45:03,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:45:03,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:45:03,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:45:03,763 INFO L87 Difference]: Start difference. First operand has 186 states, 98 states have (on average 4.683673469387755) internal successors, (459), 185 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:45:04,327 INFO L93 Difference]: Finished difference Result 330 states and 815 transitions. [2021-10-07 16:45:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:45:04,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:45:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:45:04,357 INFO L225 Difference]: With dead ends: 330 [2021-10-07 16:45:04,358 INFO L226 Difference]: Without dead ends: 330 [2021-10-07 16:45:04,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:45:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-10-07 16:45:04,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 167. [2021-10-07 16:45:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 91 states have (on average 4.571428571428571) internal successors, (416), 166 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2021-10-07 16:45:04,415 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 2 [2021-10-07 16:45:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:45:04,416 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2021-10-07 16:45:04,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2021-10-07 16:45:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:45:04,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:45:04,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:45:04,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 16:45:04,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:45:04,619 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-07 16:45:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:45:04,621 INFO L82 PathProgramCache]: Analyzing trace with hash 19809, now seen corresponding path program 1 times [2021-10-07 16:45:04,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:45:04,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752242163] [2021-10-07 16:45:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:45:04,622 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:45:04,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:45:04,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:45:04,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:45:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:45:04,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:45:04,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:45:04,730 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-07 16:45:04,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-07 16:45:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:04,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:45:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:04,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:45:04,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752242163] [2021-10-07 16:45:04,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752242163] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:45:04,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:45:04,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:45:04,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383676761] [2021-10-07 16:45:04,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:45:04,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:45:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:45:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:45:04,781 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:45:04,955 INFO L93 Difference]: Finished difference Result 166 states and 413 transitions. [2021-10-07 16:45:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:45:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:45:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:45:04,958 INFO L225 Difference]: With dead ends: 166 [2021-10-07 16:45:04,959 INFO L226 Difference]: Without dead ends: 166 [2021-10-07 16:45:04,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:45:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-07 16:45:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-10-07 16:45:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 91 states have (on average 4.538461538461538) internal successors, (413), 165 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2021-10-07 16:45:04,975 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 2 [2021-10-07 16:45:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:45:04,976 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2021-10-07 16:45:04,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2021-10-07 16:45:04,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:45:04,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:45:04,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:45:04,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:45:05,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:45:05,190 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-07 16:45:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:45:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash 19917, now seen corresponding path program 1 times [2021-10-07 16:45:05,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:45:05,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547980666] [2021-10-07 16:45:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:45:05,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:45:05,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:45:05,195 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:45:05,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:45:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:45:05,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:45:05,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:45:05,466 INFO L354 Elim1Store]: treesize reduction 145, result has 24.9 percent of original size [2021-10-07 16:45:05,467 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 37 treesize of output 71 [2021-10-07 16:45:05,483 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 72 treesize of output 70 [2021-10-07 16:45:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:05,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:45:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:05,675 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:45:05,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547980666] [2021-10-07 16:45:05,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547980666] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:45:05,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:45:05,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:45:05,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281726104] [2021-10-07 16:45:05,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:45:05,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:45:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:45:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:45:05,678 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:45:05,840 INFO L93 Difference]: Finished difference Result 137 states and 326 transitions. [2021-10-07 16:45:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:45:05,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:45:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:45:05,843 INFO L225 Difference]: With dead ends: 137 [2021-10-07 16:45:05,843 INFO L226 Difference]: Without dead ends: 137 [2021-10-07 16:45:05,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:45:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-07 16:45:05,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-10-07 16:45:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 81 states have (on average 4.0246913580246915) internal successors, (326), 136 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:05,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 326 transitions. [2021-10-07 16:45:05,855 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 326 transitions. Word has length 2 [2021-10-07 16:45:05,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:45:05,856 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 326 transitions. [2021-10-07 16:45:05,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:05,856 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 326 transitions. [2021-10-07 16:45:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:45:05,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:45:05,857 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:45:05,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:45:06,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:45:06,069 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-07 16:45:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:45:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash 19918, now seen corresponding path program 1 times [2021-10-07 16:45:06,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:45:06,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347686662] [2021-10-07 16:45:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:45:06,072 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:45:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:45:06,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:45:06,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:45:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:45:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:45:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:45:06,191 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-07 16:45:06,191 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 24 treesize of output 31 [2021-10-07 16:45:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:06,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:45:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:06,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:45:06,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347686662] [2021-10-07 16:45:06,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347686662] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:45:06,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:45:06,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:45:06,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575400833] [2021-10-07 16:45:06,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:45:06,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:45:06,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:45:06,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:45:06,260 INFO L87 Difference]: Start difference. First operand 137 states and 326 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:45:06,416 INFO L93 Difference]: Finished difference Result 108 states and 239 transitions. [2021-10-07 16:45:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:45:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:45:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:45:06,419 INFO L225 Difference]: With dead ends: 108 [2021-10-07 16:45:06,419 INFO L226 Difference]: Without dead ends: 108 [2021-10-07 16:45:06,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:45:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-07 16:45:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-07 16:45:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 3.3661971830985915) internal successors, (239), 107 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 239 transitions. [2021-10-07 16:45:06,463 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 239 transitions. Word has length 2 [2021-10-07 16:45:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:45:06,463 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 239 transitions. [2021-10-07 16:45:06,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 239 transitions. [2021-10-07 16:45:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:45:06,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:45:06,464 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:45:06,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 16:45:06,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:45:06,671 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-07 16:45:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:45:06,673 INFO L82 PathProgramCache]: Analyzing trace with hash 19141600, now seen corresponding path program 1 times [2021-10-07 16:45:06,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:45:06,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950299651] [2021-10-07 16:45:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:45:06,674 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:45:06,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:45:06,675 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:45:06,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:45:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:45:06,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:45:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:45:06,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:45:06,947 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 16:45:06,948 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 [2021-10-07 16:45:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:07,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:45:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:07,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:45:07,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950299651] [2021-10-07 16:45:07,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950299651] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:45:07,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:45:07,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:45:07,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774094132] [2021-10-07 16:45:07,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:45:07,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:45:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:45:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:45:07,634 INFO L87 Difference]: Start difference. First operand 108 states and 239 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) [2021-10-07 16:45:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:45:09,286 INFO L93 Difference]: Finished difference Result 627 states and 1402 transitions. [2021-10-07 16:45:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:45:09,292 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 [2021-10-07 16:45:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:45:09,297 INFO L225 Difference]: With dead ends: 627 [2021-10-07 16:45:09,297 INFO L226 Difference]: Without dead ends: 627 [2021-10-07 16:45:09,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 840.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:45:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-10-07 16:45:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 112. [2021-10-07 16:45:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 3.2933333333333334) internal successors, (247), 111 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 247 transitions. [2021-10-07 16:45:09,309 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 247 transitions. Word has length 4 [2021-10-07 16:45:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:45:09,310 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 247 transitions. [2021-10-07 16:45:09,310 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) [2021-10-07 16:45:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 247 transitions. [2021-10-07 16:45:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:45:09,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:45:09,311 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:45:09,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 16:45:09,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:45:09,523 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-07 16:45:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:45:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash 19156268, now seen corresponding path program 1 times [2021-10-07 16:45:09,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:45:09,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164542177] [2021-10-07 16:45:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:45:09,526 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:45:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:45:09,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:45:09,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:45:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:45:09,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:45:09,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:45:09,623 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-07 16:45:09,624 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 [2021-10-07 16:45:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:09,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:45:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:09,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:45:09,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164542177] [2021-10-07 16:45:09,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164542177] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:45:09,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:45:09,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:45:09,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65766714] [2021-10-07 16:45:09,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:45:09,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:45:09,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:45:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:45:09,672 INFO L87 Difference]: Start difference. First operand 112 states and 247 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) [2021-10-07 16:45:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:45:09,783 INFO L93 Difference]: Finished difference Result 101 states and 225 transitions. [2021-10-07 16:45:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:45:09,784 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 [2021-10-07 16:45:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:45:09,787 INFO L225 Difference]: With dead ends: 101 [2021-10-07 16:45:09,787 INFO L226 Difference]: Without dead ends: 101 [2021-10-07 16:45:09,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:45:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-07 16:45:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-07 16:45:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 3.0821917808219177) internal successors, (225), 100 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2021-10-07 16:45:09,793 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 4 [2021-10-07 16:45:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:45:09,794 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2021-10-07 16:45:09,794 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) [2021-10-07 16:45:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2021-10-07 16:45:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:45:09,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:45:09,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:45:09,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:45:10,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:45:10,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-07 16:45:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:45:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash 19156269, now seen corresponding path program 1 times [2021-10-07 16:45:10,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:45:10,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075040233] [2021-10-07 16:45:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:45:10,011 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:45:10,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:45:10,012 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:45:10,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:45:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:45:10,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:45:10,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:45:10,231 INFO L354 Elim1Store]: treesize reduction 149, result has 22.8 percent of original size [2021-10-07 16:45:10,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 64 [2021-10-07 16:45:10,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2021-10-07 16:45:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:10,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:45:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:10,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:45:10,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075040233] [2021-10-07 16:45:10,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075040233] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:45:10,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:45:10,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:45:10,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989432926] [2021-10-07 16:45:10,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:45:10,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:45:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:45:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:45:10,673 INFO L87 Difference]: Start difference. First operand 101 states and 225 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) [2021-10-07 16:45:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:45:10,837 INFO L93 Difference]: Finished difference Result 90 states and 203 transitions. [2021-10-07 16:45:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:45:10,838 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 [2021-10-07 16:45:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:45:10,839 INFO L225 Difference]: With dead ends: 90 [2021-10-07 16:45:10,840 INFO L226 Difference]: Without dead ends: 90 [2021-10-07 16:45:10,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:45:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-07 16:45:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-07 16:45:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 2.859154929577465) internal successors, (203), 89 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 203 transitions. [2021-10-07 16:45:10,845 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 203 transitions. Word has length 4 [2021-10-07 16:45:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:45:10,845 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 203 transitions. [2021-10-07 16:45:10,845 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) [2021-10-07 16:45:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 203 transitions. [2021-10-07 16:45:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:45:10,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:45:10,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:45:10,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 16:45:11,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:45:11,055 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-07 16:45:11,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:45:11,056 INFO L82 PathProgramCache]: Analyzing trace with hash 19156165, now seen corresponding path program 1 times [2021-10-07 16:45:11,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:45:11,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260180945] [2021-10-07 16:45:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:45:11,058 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:45:11,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:45:11,059 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:45:11,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:45:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:45:11,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:45:11,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:45:11,145 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-07 16:45:11,145 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 [2021-10-07 16:45:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:11,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:45:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:45:11,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:45:11,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260180945] [2021-10-07 16:45:11,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260180945] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:45:11,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:45:11,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:45:11,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074947028] [2021-10-07 16:45:11,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:45:11,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:45:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:45:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:45:11,196 INFO L87 Difference]: Start difference. First operand 90 states and 203 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:45:11,367 INFO L93 Difference]: Finished difference Result 58 states and 126 transitions. [2021-10-07 16:45:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:45:11,368 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 4 [2021-10-07 16:45:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:45:11,368 INFO L225 Difference]: With dead ends: 58 [2021-10-07 16:45:11,368 INFO L226 Difference]: Without dead ends: 58 [2021-10-07 16:45:11,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:45:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-07 16:45:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-07 16:45:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 126 transitions. [2021-10-07 16:45:11,372 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 126 transitions. Word has length 4 [2021-10-07 16:45:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:45:11,372 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 126 transitions. [2021-10-07 16:45:11,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:45:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 126 transitions. [2021-10-07 16:45:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:45:11,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:45:11,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:45:11,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 16:45:11,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:45:11,582 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-07 16:45:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:45:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash 19156166, now seen corresponding path program 1 times [2021-10-07 16:45:11,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:45:11,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806381239] [2021-10-07 16:45:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:45:11,585 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:45:11,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:45:11,586 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:45:11,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:45:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-07 16:45:11,653 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-07 16:45:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-07 16:45:11,741 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-07 16:45:11,742 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-07 16:45:11,743 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:45:11,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:45:11,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:45:11,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:45:11,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:45:11,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:45:11,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:45:11,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATION [2021-10-07 16:45:11,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATION [2021-10-07 16:45:11,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:45:11,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:45:11,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:45:11,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:45:11,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:45:11,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:45:11,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:45:11,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:45:11,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:45:11,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:45:11,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:45:11,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:45:11,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:45:11,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:45:11,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:45:11,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:45:11,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:45:11,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:45:11,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:45:11,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATION [2021-10-07 16:45:11,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATION [2021-10-07 16:45:11,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:45:11,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:45:11,965 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:45:11,965 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:45:11,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:45:11 BasicIcfg [2021-10-07 16:45:11,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:45:11,988 INFO L168 Benchmark]: Toolchain (without parser) took 30842.85 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 127.9 MB in the beginning and 123.8 MB in the end (delta: 4.1 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2021-10-07 16:45:11,988 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 129.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:45:11,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.11 ms. Allocated memory is still 153.1 MB. Free memory was 127.5 MB in the beginning and 113.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:45:11,989 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.67 ms. Allocated memory is still 153.1 MB. Free memory was 113.9 MB in the beginning and 111.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:45:11,990 INFO L168 Benchmark]: Boogie Preprocessor took 78.52 ms. Allocated memory is still 153.1 MB. Free memory was 111.9 MB in the beginning and 110.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:45:11,990 INFO L168 Benchmark]: RCFGBuilder took 1235.36 ms. Allocated memory is still 153.1 MB. Free memory was 110.2 MB in the beginning and 119.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:45:11,991 INFO L168 Benchmark]: TraceAbstraction took 29007.71 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 118.9 MB in the beginning and 123.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 8.0 GB. [2021-10-07 16:45:11,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 129.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 408.11 ms. Allocated memory is still 153.1 MB. Free memory was 127.5 MB in the beginning and 113.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 95.67 ms. Allocated memory is still 153.1 MB. Free memory was 113.9 MB in the beginning and 111.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 78.52 ms. Allocated memory is still 153.1 MB. Free memory was 111.9 MB in the beginning and 110.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1235.36 ms. Allocated memory is still 153.1 MB. Free memory was 110.2 MB in the beginning and 119.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 29007.71 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 118.9 MB in the beginning and 123.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 19777.2ms, 133 PlacesBefore, 41 PlacesAfterwards, 137 TransitionsBefore, 37 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 8 FixpointIterations, 82 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 10 ConcurrentYvCompositions, 8 ChoiceCompositions, 154 TotalNumberOfCompositions, 1551 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1505, positive: 1489, positive conditional: 0, positive unconditional: 1489, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 672, positive: 669, positive conditional: 0, positive unconditional: 669, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 672, positive: 669, positive conditional: 0, positive unconditional: 669, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 218, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 218, negative conditional: 0, negative unconditional: 218, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1505, positive: 820, positive conditional: 0, positive unconditional: 820, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 672, unknown conditional: 0, unknown unconditional: 672] , Statistics on independence cache: Total cache size (in pairs): 52, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, 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 - CounterExampleResult [Line: 51]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L41] 0 int *f; [L42] 0 int x1, x2, size; [L43] 0 unsigned int i1, i2, n; [L79] 0 pthread_t t1, t2; [L82] 0 n = __VERIFIER_nondet_uint() [L83] 0 size = __VERIFIER_nondet_int() [L38] COND FALSE 0 !(!cond) [L38] COND FALSE 0 !(!cond) [L102] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L103] 0 int i = 0; VAL [f={0:0}, i1=0, i2=0, size=0, x1=0, x2=0] [L103] COND FALSE 0 !(i < size) [L106] 0 return arr; [L84] 0 f = create_fresh_int_array(size) [L87] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [f={1:0}, i1=0, i2=0, size=0, x1=0, x2=0] [L49] COND TRUE 1 i1 < n [L51] 1 f[x1] - UnprovableResult [Line: 51]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 65]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 65]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 71]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 71]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 104]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 104]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 87]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 87]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 89]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 89]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 90]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 90]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 93]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 78]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 87]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 159 locations, 30 error locations. Started 1 CEGAR loops. OverallTime: 28792.9ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 11.4ms, AutomataDifference: 3245.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19848.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 115 SDtfs, 676 SDslu, 100 SDs, 0 SdLazy, 293 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2365.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1127.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 136.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 678 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 86.2ms SsaConstructionTime, 240.4ms SatisfiabilityAnalysisTime, 2839.4ms InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 32 ConstructedInterpolants, 5 QuantifiedInterpolants, 527 SizeOfPredicates, 39 NumberOfNonLiveVariables, 377 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 0/6 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 proved your program to be incorrect! [2021-10-07 16:45:12,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...