/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/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 18:12:26,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 18:12:26,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 18:12:26,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-08 18:12:26,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 18:12:26,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 18:12:26,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 18:12:26,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 18:12:26,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 18:12:26,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 18:12:26,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 18:12:26,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 18:12:26,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 18:12:26,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 18:12:26,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 18:12:26,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 18:12:26,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-08 18:12:26,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 18:12:26,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 18:12:26,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 18:12:26,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 18:12:26,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 18:12:26,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 18:12:26,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 18:12:26,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 18:12:26,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 18:12:26,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 18:12:26,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 18:12:26,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 18:12:26,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 18:12:26,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 18:12:26,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 18:12:26,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 18:12:26,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 18:12:26,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 18:12:26,553 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 18:12:26,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 18:12:26,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 18:12:26,555 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 18:12:26,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 18:12:26,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 18:12:26,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 18:12:26,556 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 18:12:26,556 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 18:12:26,557 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 18:12:26,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 18:12:26,557 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 18:12:26,557 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 18:12:26,558 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 18:12:26,558 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 18:12:26,558 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 18:12:26,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 18:12:26,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 18:12:26,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 18:12:26,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 18:12:26,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 18:12:26,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 18:12:26,559 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 18:12:26,559 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 18:12:26,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 18:12:26,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 18:12:26,560 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 18:12:26,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 18:12:27,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 18:12:27,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 18:12:27,005 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 18:12:27,006 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 18:12:27,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2021-10-08 18:12:27,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/290b21c3f/fc1bd72841584df38200ece93b976f39/FLAGbba9d4dac [2021-10-08 18:12:27,754 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 18:12:27,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2021-10-08 18:12:27,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/290b21c3f/fc1bd72841584df38200ece93b976f39/FLAGbba9d4dac [2021-10-08 18:12:28,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/290b21c3f/fc1bd72841584df38200ece93b976f39 [2021-10-08 18:12:28,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 18:12:28,130 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 18:12:28,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 18:12:28,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 18:12:28,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 18:12:28,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72fda212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28, skipping insertion in model container [2021-10-08 18:12:28,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 18:12:28,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 18:12:28,454 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/test-context1.wvr.c[2428,2441] [2021-10-08 18:12:28,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:12:28,478 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-08 18:12:28,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 18:12:28,496 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/test-context1.wvr.c[2428,2441] [2021-10-08 18:12:28,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:12:28,506 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 18:12:28,531 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/test-context1.wvr.c[2428,2441] [2021-10-08 18:12:28,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:12:28,561 INFO L208 MainTranslator]: Completed translation [2021-10-08 18:12:28,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28 WrapperNode [2021-10-08 18:12:28,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 18:12:28,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 18:12:28,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 18:12:28,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 18:12:28,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 18:12:28,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 18:12:28,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 18:12:28,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 18:12:28,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 18:12:28,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 18:12:28,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 18:12:28,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 18:12:28,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (1/1) ... [2021-10-08 18:12:28,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 18:12:28,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 18:12:28,699 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 18:12:28,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 18:12:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 18:12:28,772 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 18:12:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 18:12:28,773 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 18:12:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 18:12:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 18:12:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 18:12:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 18:12:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 18:12:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 18:12:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 18:12:28,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 18:12:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 18:12:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 18:12:28,780 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 18:12:29,841 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 18:12:29,841 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-08 18:12:29,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 06:12:29 BoogieIcfgContainer [2021-10-08 18:12:29,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 18:12:29,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 18:12:29,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 18:12:29,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 18:12:29,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 06:12:28" (1/3) ... [2021-10-08 18:12:29,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d93cc7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 06:12:29, skipping insertion in model container [2021-10-08 18:12:29,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:12:28" (2/3) ... [2021-10-08 18:12:29,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d93cc7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 06:12:29, skipping insertion in model container [2021-10-08 18:12:29,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 06:12:29" (3/3) ... [2021-10-08 18:12:29,852 INFO L111 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2021-10-08 18:12:29,858 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 18:12:29,858 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-08 18:12:29,858 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 18:12:29,893 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,894 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,894 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,894 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,895 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,895 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,895 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,895 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,895 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,896 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,897 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,897 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,897 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,898 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,898 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,898 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,899 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,899 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,899 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,900 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,900 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,900 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,901 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,901 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,902 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,903 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,903 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,904 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,904 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,904 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,904 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,904 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,905 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,905 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,905 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,905 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,905 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,906 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,906 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,906 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,906 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,906 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,907 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,907 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,907 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,907 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,907 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,908 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,908 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,909 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,909 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,909 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,909 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,910 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,914 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,914 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,914 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,915 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,916 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,916 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,916 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,919 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,920 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,920 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,920 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,920 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,920 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,920 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,921 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:12:29,926 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-08 18:12:29,978 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 18:12:29,986 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-08 18:12:29,986 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-08 18:12:30,008 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 18:12:30,021 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 120 transitions, 256 flow [2021-10-08 18:12:30,024 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 120 transitions, 256 flow [2021-10-08 18:12:30,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2021-10-08 18:12:30,117 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2021-10-08 18:12:30,119 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-08 18:12:30,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 110 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2021-10-08 18:12:30,133 INFO L116 LiptonReduction]: Number of co-enabled transitions 660 [2021-10-08 18:12:44,897 INFO L131 LiptonReduction]: Checked pairs total: 973 [2021-10-08 18:12:44,897 INFO L133 LiptonReduction]: Total number of compositions: 135 [2021-10-08 18:12:44,911 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 82 flow [2021-10-08 18:12:44,929 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:12:44,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:44,937 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:12:44,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:12:44,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash 17761, now seen corresponding path program 1 times [2021-10-08 18:12:44,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:44,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633982126] [2021-10-08 18:12:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:44,956 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:44,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:44,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:44,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 18:12:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:45,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 18:12:45,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:45,281 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-08 18:12:45,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-08 18:12:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:45,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:45,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:45,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633982126] [2021-10-08 18:12:45,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633982126] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:45,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:45,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 18:12:45,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087980973] [2021-10-08 18:12:45,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 18:12:45,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:45,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 18:12:45,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:12:45,830 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:45,927 INFO L93 Difference]: Finished difference Result 104 states and 249 transitions. [2021-10-08 18:12:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:12:45,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:12:45,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:45,940 INFO L225 Difference]: With dead ends: 104 [2021-10-08 18:12:45,941 INFO L226 Difference]: Without dead ends: 104 [2021-10-08 18:12:45,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:12:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-08 18:12:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-08 18:12:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 4.016129032258065) internal successors, (249), 103 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 249 transitions. [2021-10-08 18:12:45,988 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 249 transitions. Word has length 2 [2021-10-08 18:12:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:45,989 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 249 transitions. [2021-10-08 18:12:45,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 249 transitions. [2021-10-08 18:12:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:12:45,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:45,990 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:12:46,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:46,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:46,210 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:12:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:46,212 INFO L82 PathProgramCache]: Analyzing trace with hash 17839, now seen corresponding path program 1 times [2021-10-08 18:12:46,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:46,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176210438] [2021-10-08 18:12:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:46,214 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:46,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:46,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:46,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 18:12:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:46,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-08 18:12:46,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:46,501 INFO L354 Elim1Store]: treesize reduction 151, result has 21.8 percent of original size [2021-10-08 18:12:46,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 74 [2021-10-08 18:12:46,513 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 178 treesize of output 176 [2021-10-08 18:12:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:46,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:46,964 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:46,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176210438] [2021-10-08 18:12:46,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176210438] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:46,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:46,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:12:46,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113667981] [2021-10-08 18:12:46,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:12:46,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:46,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:12:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:12:46,968 INFO L87 Difference]: Start difference. First operand 104 states and 249 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) [2021-10-08 18:12:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:47,080 INFO L93 Difference]: Finished difference Result 87 states and 200 transitions. [2021-10-08 18:12:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:12:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:12:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:47,084 INFO L225 Difference]: With dead ends: 87 [2021-10-08 18:12:47,084 INFO L226 Difference]: Without dead ends: 87 [2021-10-08 18:12:47,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:12:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-08 18:12:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-08 18:12:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 3.6363636363636362) internal successors, (200), 86 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 200 transitions. [2021-10-08 18:12:47,095 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 200 transitions. Word has length 2 [2021-10-08 18:12:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:47,096 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 200 transitions. [2021-10-08 18:12:47,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 200 transitions. [2021-10-08 18:12:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:12:47,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:47,097 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:12:47,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:47,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:47,310 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:12:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash 17760, now seen corresponding path program 1 times [2021-10-08 18:12:47,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:47,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594806987] [2021-10-08 18:12:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:47,313 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:47,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:47,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:47,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 18:12:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:47,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 18:12:47,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:47,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:12:47,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:12:47,562 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:12:47,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:12:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:47,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:47,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:47,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594806987] [2021-10-08 18:12:47,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594806987] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:47,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:47,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:12:47,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593979374] [2021-10-08 18:12:47,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:12:47,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:47,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:12:47,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:12:47,735 INFO L87 Difference]: Start difference. First operand 87 states and 200 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) [2021-10-08 18:12:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:48,030 INFO L93 Difference]: Finished difference Result 173 states and 401 transitions. [2021-10-08 18:12:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:12:48,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:12:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:48,034 INFO L225 Difference]: With dead ends: 173 [2021-10-08 18:12:48,034 INFO L226 Difference]: Without dead ends: 173 [2021-10-08 18:12:48,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:12:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-08 18:12:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 89. [2021-10-08 18:12:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 3.6140350877192984) internal successors, (206), 88 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 206 transitions. [2021-10-08 18:12:48,047 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 206 transitions. Word has length 2 [2021-10-08 18:12:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:48,048 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 206 transitions. [2021-10-08 18:12:48,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 206 transitions. [2021-10-08 18:12:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:12:48,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:48,049 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:12:48,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:48,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:48,261 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:12:48,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:48,262 INFO L82 PathProgramCache]: Analyzing trace with hash 17840, now seen corresponding path program 1 times [2021-10-08 18:12:48,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:48,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215028439] [2021-10-08 18:12:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:48,264 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:48,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:48,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:48,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 18:12:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 18:12:48,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:48,470 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-08 18:12:48,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 261 [2021-10-08 18:12:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:49,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:49,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:49,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215028439] [2021-10-08 18:12:49,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215028439] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:49,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:49,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:12:49,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493033333] [2021-10-08 18:12:49,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:12:49,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:49,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:12:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:12:49,877 INFO L87 Difference]: Start difference. First operand 89 states and 206 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) [2021-10-08 18:12:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:49,975 INFO L93 Difference]: Finished difference Result 72 states and 155 transitions. [2021-10-08 18:12:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:12:49,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:12:49,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:49,978 INFO L225 Difference]: With dead ends: 72 [2021-10-08 18:12:49,978 INFO L226 Difference]: Without dead ends: 72 [2021-10-08 18:12:49,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:12:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-08 18:12:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-08 18:12:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 3.1) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-10-08 18:12:49,994 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 2 [2021-10-08 18:12:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:49,994 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-10-08 18:12:49,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-10-08 18:12:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:12:49,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:49,998 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-08 18:12:50,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:50,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:50,210 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:12:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash 17142656, now seen corresponding path program 1 times [2021-10-08 18:12:50,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:50,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121497598] [2021-10-08 18:12:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:50,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:50,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:50,214 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:50,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-08 18:12:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:50,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 18:12:50,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:50,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:12:50,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:12:50,454 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:12:50,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:12:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:50,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:51,083 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:51,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121497598] [2021-10-08 18:12:51,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121497598] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:12:51,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:12:51,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 18:12:51,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182144836] [2021-10-08 18:12:51,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:12:51,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:51,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:12:51,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:12:51,086 INFO L87 Difference]: Start difference. First operand 72 states and 155 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) [2021-10-08 18:12:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:52,369 INFO L93 Difference]: Finished difference Result 411 states and 898 transitions. [2021-10-08 18:12:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 18:12:52,370 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 [2021-10-08 18:12:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:52,377 INFO L225 Difference]: With dead ends: 411 [2021-10-08 18:12:52,377 INFO L226 Difference]: Without dead ends: 411 [2021-10-08 18:12:52,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 830.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:12:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-10-08 18:12:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 76. [2021-10-08 18:12:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 3.0185185185185186) internal successors, (163), 75 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 163 transitions. [2021-10-08 18:12:52,397 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 163 transitions. Word has length 4 [2021-10-08 18:12:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:52,397 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 163 transitions. [2021-10-08 18:12:52,400 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) [2021-10-08 18:12:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 163 transitions. [2021-10-08 18:12:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:12:52,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:52,401 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 18:12:52,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:52,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:52,605 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:12:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash 17154876, now seen corresponding path program 1 times [2021-10-08 18:12:52,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:52,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080168308] [2021-10-08 18:12:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:52,608 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:52,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:52,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:52,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-08 18:12:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:52,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 18:12:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:52,820 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-08 18:12:52,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-08 18:12:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:53,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:53,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:53,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080168308] [2021-10-08 18:12:53,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080168308] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:53,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:53,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 18:12:53,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044827352] [2021-10-08 18:12:53,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 18:12:53,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:53,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 18:12:53,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:12:53,203 INFO L87 Difference]: Start difference. First operand 76 states and 163 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) [2021-10-08 18:12:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:53,263 INFO L93 Difference]: Finished difference Result 68 states and 147 transitions. [2021-10-08 18:12:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:12:53,264 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 [2021-10-08 18:12:53,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:53,266 INFO L225 Difference]: With dead ends: 68 [2021-10-08 18:12:53,266 INFO L226 Difference]: Without dead ends: 68 [2021-10-08 18:12:53,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:12:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-08 18:12:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-08 18:12:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 2.826923076923077) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 147 transitions. [2021-10-08 18:12:53,272 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 147 transitions. Word has length 4 [2021-10-08 18:12:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:53,272 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 147 transitions. [2021-10-08 18:12:53,272 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) [2021-10-08 18:12:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 147 transitions. [2021-10-08 18:12:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:12:53,273 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:53,273 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 18:12:53,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:53,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:53,475 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:12:53,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash 17154829, now seen corresponding path program 1 times [2021-10-08 18:12:53,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:53,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428704734] [2021-10-08 18:12:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:53,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:53,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:53,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-08 18:12:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:12:53,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:53,680 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-08 18:12:53,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-08 18:12:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:54,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:54,040 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:54,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428704734] [2021-10-08 18:12:54,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428704734] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:54,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:54,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-08 18:12:54,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782268222] [2021-10-08 18:12:54,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:12:54,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:12:54,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:12:54,043 INFO L87 Difference]: Start difference. First operand 68 states and 147 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) [2021-10-08 18:12:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:54,115 INFO L93 Difference]: Finished difference Result 48 states and 100 transitions. [2021-10-08 18:12:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:12:54,116 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 [2021-10-08 18:12:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:54,116 INFO L225 Difference]: With dead ends: 48 [2021-10-08 18:12:54,117 INFO L226 Difference]: Without dead ends: 48 [2021-10-08 18:12:54,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 18:12:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-08 18:12:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-08 18:12:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 100 transitions. [2021-10-08 18:12:54,121 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 100 transitions. Word has length 4 [2021-10-08 18:12:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:54,121 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 100 transitions. [2021-10-08 18:12:54,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 100 transitions. [2021-10-08 18:12:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:12:54,122 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:54,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 18:12:54,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:54,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:54,332 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:12:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash 17154877, now seen corresponding path program 1 times [2021-10-08 18:12:54,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:54,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122478201] [2021-10-08 18:12:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:54,334 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:54,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:54,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 18:12:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:54,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:12:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:54,525 INFO L354 Elim1Store]: treesize reduction 155, result has 19.7 percent of original size [2021-10-08 18:12:54,526 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 44 treesize of output 68 [2021-10-08 18:12:54,532 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 95 treesize of output 93 [2021-10-08 18:12:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:56,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:56,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:56,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122478201] [2021-10-08 18:12:56,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122478201] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:56,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:56,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:12:56,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206484777] [2021-10-08 18:12:56,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:12:56,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:56,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:12:56,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:12:56,962 INFO L87 Difference]: Start difference. First operand 48 states and 100 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) [2021-10-08 18:12:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:57,046 INFO L93 Difference]: Finished difference Result 42 states and 88 transitions. [2021-10-08 18:12:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:12:57,047 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 [2021-10-08 18:12:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:57,048 INFO L225 Difference]: With dead ends: 42 [2021-10-08 18:12:57,048 INFO L226 Difference]: Without dead ends: 42 [2021-10-08 18:12:57,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2036.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:12:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-08 18:12:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-08 18:12:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 88 transitions. [2021-10-08 18:12:57,051 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 88 transitions. Word has length 4 [2021-10-08 18:12:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:57,052 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 88 transitions. [2021-10-08 18:12:57,052 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) [2021-10-08 18:12:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 88 transitions. [2021-10-08 18:12:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:12:57,052 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:57,052 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 18:12:57,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:57,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:57,254 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:12:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash 17154830, now seen corresponding path program 1 times [2021-10-08 18:12:57,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:57,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389585758] [2021-10-08 18:12:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:57,256 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:57,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:57,257 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:57,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 18:12:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:57,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 18:12:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:57,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:12:57,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:12:57,513 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:12:57,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:12:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:57,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:57,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:57,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389585758] [2021-10-08 18:12:57,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389585758] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:57,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:57,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 18:12:57,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726293882] [2021-10-08 18:12:57,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:12:57,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:58,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:12:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:12:58,000 INFO L87 Difference]: Start difference. First operand 42 states and 88 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:02,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:13:02,556 INFO L93 Difference]: Finished difference Result 84 states and 172 transitions. [2021-10-08 18:13:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 18:13:02,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-08 18:13:02,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:13:02,559 INFO L225 Difference]: With dead ends: 84 [2021-10-08 18:13:02,559 INFO L226 Difference]: Without dead ends: 84 [2021-10-08 18:13:02,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:13:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-08 18:13:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-10-08 18:13:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 2.491228070175439) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 142 transitions. [2021-10-08 18:13:02,573 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 142 transitions. Word has length 4 [2021-10-08 18:13:02,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:13:02,573 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 142 transitions. [2021-10-08 18:13:02,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 142 transitions. [2021-10-08 18:13:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 18:13:02,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:13:02,575 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-10-08 18:13:02,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:02,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:13:02,788 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:13:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:13:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash -694065042, now seen corresponding path program 1 times [2021-10-08 18:13:02,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:13:02,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278557776] [2021-10-08 18:13:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:13:02,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:13:02,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:13:02,792 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:13:02,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 18:13:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:13:02,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 18:13:02,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:13:02,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:13:02,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:13:03,038 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:13:03,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:13:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:13:03,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:13:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:13:04,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:13:04,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278557776] [2021-10-08 18:13:04,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278557776] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:13:04,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:13:04,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 18:13:04,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880053162] [2021-10-08 18:13:04,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 18:13:04,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:13:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 18:13:04,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-08 18:13:04,165 INFO L87 Difference]: Start difference. First operand 62 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:13:09,600 INFO L93 Difference]: Finished difference Result 148 states and 306 transitions. [2021-10-08 18:13:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 18:13:09,602 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 18:13:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:13:09,604 INFO L225 Difference]: With dead ends: 148 [2021-10-08 18:13:09,604 INFO L226 Difference]: Without dead ends: 148 [2021-10-08 18:13:09,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 988.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-08 18:13:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-08 18:13:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 82. [2021-10-08 18:13:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 2.5454545454545454) internal successors, (196), 81 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 196 transitions. [2021-10-08 18:13:09,612 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 196 transitions. Word has length 6 [2021-10-08 18:13:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:13:09,612 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 196 transitions. [2021-10-08 18:13:09,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 196 transitions. [2021-10-08 18:13:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 18:13:09,614 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:13:09,614 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-08 18:13:09,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:09,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:13:09,823 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:13:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:13:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash 425793472, now seen corresponding path program 2 times [2021-10-08 18:13:09,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:13:09,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593057425] [2021-10-08 18:13:09,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:13:09,826 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:13:09,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:13:09,827 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:13:09,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-08 18:13:09,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:13:09,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:13:09,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 18:13:09,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:13:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:13:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:13:10,098 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:13:10,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:13:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:13:10,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:13:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:13:11,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:13:11,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593057425] [2021-10-08 18:13:11,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593057425] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:13:11,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:13:11,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 18:13:11,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756969263] [2021-10-08 18:13:11,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 18:13:11,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:13:11,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 18:13:11,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-08 18:13:11,999 INFO L87 Difference]: Start difference. First operand 82 states and 196 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:13:18,404 INFO L93 Difference]: Finished difference Result 733 states and 1724 transitions. [2021-10-08 18:13:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 18:13:18,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 18:13:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:13:18,412 INFO L225 Difference]: With dead ends: 733 [2021-10-08 18:13:18,412 INFO L226 Difference]: Without dead ends: 733 [2021-10-08 18:13:18,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5454.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-08 18:13:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-10-08 18:13:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 90. [2021-10-08 18:13:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 2.4941176470588236) internal successors, (212), 89 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 212 transitions. [2021-10-08 18:13:18,425 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 212 transitions. Word has length 8 [2021-10-08 18:13:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:13:18,425 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 212 transitions. [2021-10-08 18:13:18,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 212 transitions. [2021-10-08 18:13:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 18:13:18,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:13:18,426 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-08 18:13:18,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:18,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:13:18,639 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:13:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:13:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash 437429902, now seen corresponding path program 1 times [2021-10-08 18:13:18,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:13:18,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526462914] [2021-10-08 18:13:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:13:18,642 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:13:18,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:13:18,643 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:13:18,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-08 18:13:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:13:18,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 18:13:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:13:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:13:18,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:13:18,937 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:13:18,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:13:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:13:19,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:13:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:13:20,347 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:13:20,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526462914] [2021-10-08 18:13:20,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526462914] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:13:20,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:13:20,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 18:13:20,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404744533] [2021-10-08 18:13:20,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 18:13:20,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:13:20,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 18:13:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:13:20,350 INFO L87 Difference]: Start difference. First operand 90 states and 212 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:13:43,106 INFO L93 Difference]: Finished difference Result 222 states and 484 transitions. [2021-10-08 18:13:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-08 18:13:43,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 18:13:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:13:43,109 INFO L225 Difference]: With dead ends: 222 [2021-10-08 18:13:43,109 INFO L226 Difference]: Without dead ends: 222 [2021-10-08 18:13:43,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2386.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-10-08 18:13:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-08 18:13:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 111. [2021-10-08 18:13:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 2.6226415094339623) internal successors, (278), 110 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 278 transitions. [2021-10-08 18:13:43,116 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 278 transitions. Word has length 8 [2021-10-08 18:13:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:13:43,116 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 278 transitions. [2021-10-08 18:13:43,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 278 transitions. [2021-10-08 18:13:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 18:13:43,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:13:43,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:13:43,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:43,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:13:43,324 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:13:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:13:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1344309230, now seen corresponding path program 1 times [2021-10-08 18:13:43,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:13:43,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601879434] [2021-10-08 18:13:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:13:43,327 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:13:43,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:13:43,328 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:13:43,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-08 18:13:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:13:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:13:43,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:13:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:13:43,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:13:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:13:43,518 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:13:43,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601879434] [2021-10-08 18:13:43,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601879434] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:13:43,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:13:43,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-08 18:13:43,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957103156] [2021-10-08 18:13:43,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:13:43,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:13:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:13:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:13:43,520 INFO L87 Difference]: Start difference. First operand 111 states and 278 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:13:43,599 INFO L93 Difference]: Finished difference Result 171 states and 415 transitions. [2021-10-08 18:13:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:13:43,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-08 18:13:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:13:43,602 INFO L225 Difference]: With dead ends: 171 [2021-10-08 18:13:43,602 INFO L226 Difference]: Without dead ends: 171 [2021-10-08 18:13:43,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:13:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-08 18:13:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2021-10-08 18:13:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 2.78125) internal successors, (356), 132 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 356 transitions. [2021-10-08 18:13:43,609 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 356 transitions. Word has length 9 [2021-10-08 18:13:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:13:43,609 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 356 transitions. [2021-10-08 18:13:43,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 356 transitions. [2021-10-08 18:13:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 18:13:43,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:13:43,611 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:13:43,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:43,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:13:43,812 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:13:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:13:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1277863902, now seen corresponding path program 1 times [2021-10-08 18:13:43,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:13:43,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512747202] [2021-10-08 18:13:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:13:43,814 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:13:43,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:13:43,815 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:13:43,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-08 18:13:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:13:43,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 18:13:43,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:13:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:13:44,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:13:44,262 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 38 treesize of output 34 [2021-10-08 18:13:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:13:45,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:13:45,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512747202] [2021-10-08 18:13:45,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512747202] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:13:45,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:13:45,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 18:13:45,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641074653] [2021-10-08 18:13:45,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 18:13:45,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:13:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 18:13:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:13:45,002 INFO L87 Difference]: Start difference. First operand 133 states and 356 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:13:48,648 INFO L93 Difference]: Finished difference Result 245 states and 555 transitions. [2021-10-08 18:13:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 18:13:48,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 18:13:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:13:48,653 INFO L225 Difference]: With dead ends: 245 [2021-10-08 18:13:48,653 INFO L226 Difference]: Without dead ends: 245 [2021-10-08 18:13:48,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1388.4ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-10-08 18:13:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-10-08 18:13:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 143. [2021-10-08 18:13:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 2.9057971014492754) internal successors, (401), 142 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 401 transitions. [2021-10-08 18:13:48,662 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 401 transitions. Word has length 10 [2021-10-08 18:13:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:13:48,662 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 401 transitions. [2021-10-08 18:13:48,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 401 transitions. [2021-10-08 18:13:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 18:13:48,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:13:48,665 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:13:48,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:48,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:13:48,878 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:13:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:13:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash 959075689, now seen corresponding path program 1 times [2021-10-08 18:13:48,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:13:48,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952088996] [2021-10-08 18:13:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:13:48,882 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:13:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:13:48,883 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:13:48,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 18:13:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:13:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-08 18:13:49,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:13:49,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:13:49,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:13:49,241 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:13:49,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:13:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:13:49,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:13:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:13:51,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:13:51,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952088996] [2021-10-08 18:13:51,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952088996] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:13:51,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:13:51,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-08 18:13:51,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983331533] [2021-10-08 18:13:51,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 18:13:51,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:13:51,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 18:13:51,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:13:51,029 INFO L87 Difference]: Start difference. First operand 143 states and 401 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:14:02,409 INFO L93 Difference]: Finished difference Result 260 states and 628 transitions. [2021-10-08 18:14:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 18:14:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 18:14:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:14:02,414 INFO L225 Difference]: With dead ends: 260 [2021-10-08 18:14:02,414 INFO L226 Difference]: Without dead ends: 260 [2021-10-08 18:14:02,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2740.1ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-08 18:14:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-08 18:14:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 166. [2021-10-08 18:14:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 2.987577639751553) internal successors, (481), 165 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 481 transitions. [2021-10-08 18:14:02,424 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 481 transitions. Word has length 11 [2021-10-08 18:14:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:14:02,426 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 481 transitions. [2021-10-08 18:14:02,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 481 transitions. [2021-10-08 18:14:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 18:14:02,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:14:02,431 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:14:02,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-08 18:14:02,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:14:02,635 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:14:02,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:14:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash 903990208, now seen corresponding path program 2 times [2021-10-08 18:14:02,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:14:02,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213030197] [2021-10-08 18:14:02,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:14:02,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:14:02,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:14:02,638 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:14:02,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 18:14:02,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 18:14:02,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:14:02,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 18:14:02,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:14:02,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:02,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:02,962 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:14:02,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:14:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-08 18:14:03,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:14:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-08 18:14:17,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:14:17,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213030197] [2021-10-08 18:14:17,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213030197] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:14:17,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:14:17,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 18:14:17,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502928482] [2021-10-08 18:14:17,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:14:17,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:14:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:14:17,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=16, Unknown=3, NotChecked=0, Total=30 [2021-10-08 18:14:17,337 INFO L87 Difference]: Start difference. First operand 166 states and 481 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:14:17,773 INFO L93 Difference]: Finished difference Result 142 states and 407 transitions. [2021-10-08 18:14:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:14:17,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 18:14:17,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:14:17,777 INFO L225 Difference]: With dead ends: 142 [2021-10-08 18:14:17,777 INFO L226 Difference]: Without dead ends: 142 [2021-10-08 18:14:17,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11243.5ms TimeCoverageRelationStatistics Valid=17, Invalid=22, Unknown=3, NotChecked=0, Total=42 [2021-10-08 18:14:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-08 18:14:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 74. [2021-10-08 18:14:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 2.2777777777777777) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 164 transitions. [2021-10-08 18:14:17,783 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 164 transitions. Word has length 11 [2021-10-08 18:14:17,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:14:17,783 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 164 transitions. [2021-10-08 18:14:17,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 164 transitions. [2021-10-08 18:14:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 18:14:17,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:14:17,784 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:14:17,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 18:14:17,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:14:17,996 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:14:17,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:14:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash 817817824, now seen corresponding path program 1 times [2021-10-08 18:14:17,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:14:17,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164326657] [2021-10-08 18:14:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:14:17,999 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:14:17,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:14:18,000 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:14:18,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 18:14:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:14:18,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:14:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:14:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:14:18,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:14:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:14:18,511 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:14:18,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164326657] [2021-10-08 18:14:18,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164326657] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:14:18,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:14:18,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 18:14:18,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125846429] [2021-10-08 18:14:18,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 18:14:18,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:14:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 18:14:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:14:18,514 INFO L87 Difference]: Start difference. First operand 74 states and 164 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:14:18,552 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2021-10-08 18:14:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:14:18,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 18:14:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:14:18,553 INFO L225 Difference]: With dead ends: 99 [2021-10-08 18:14:18,553 INFO L226 Difference]: Without dead ends: 77 [2021-10-08 18:14:18,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:14:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-08 18:14:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-10-08 18:14:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 2.1866666666666665) internal successors, (164), 76 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 164 transitions. [2021-10-08 18:14:18,558 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 164 transitions. Word has length 12 [2021-10-08 18:14:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:14:18,558 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 164 transitions. [2021-10-08 18:14:18,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 164 transitions. [2021-10-08 18:14:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 18:14:18,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:14:18,559 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:14:18,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-08 18:14:18,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:14:18,767 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:14:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:14:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1170720396, now seen corresponding path program 1 times [2021-10-08 18:14:18,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:14:18,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875708782] [2021-10-08 18:14:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:14:18,769 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:14:18,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:14:18,771 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:14:18,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 18:14:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:14:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 18:14:18,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:14:19,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-08 18:14:19,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 19 [2021-10-08 18:14:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:14:20,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:14:20,910 INFO L354 Elim1Store]: treesize reduction 570, result has 0.9 percent of original size [2021-10-08 18:14:20,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2021-10-08 18:14:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:14:21,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:14:21,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875708782] [2021-10-08 18:14:21,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875708782] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:14:21,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:14:21,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 7 [2021-10-08 18:14:21,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560747400] [2021-10-08 18:14:21,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 18:14:21,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:14:21,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 18:14:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-08 18:14:21,134 INFO L87 Difference]: Start difference. First operand 77 states and 164 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:14:22,126 INFO L93 Difference]: Finished difference Result 121 states and 270 transitions. [2021-10-08 18:14:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 18:14:22,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 18:14:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:14:22,129 INFO L225 Difference]: With dead ends: 121 [2021-10-08 18:14:22,129 INFO L226 Difference]: Without dead ends: 105 [2021-10-08 18:14:22,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1218.0ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-08 18:14:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-08 18:14:22,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2021-10-08 18:14:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 2.1538461538461537) internal successors, (196), 92 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 196 transitions. [2021-10-08 18:14:22,134 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 196 transitions. Word has length 15 [2021-10-08 18:14:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:14:22,134 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 196 transitions. [2021-10-08 18:14:22,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 196 transitions. [2021-10-08 18:14:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 18:14:22,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:14:22,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:14:22,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-08 18:14:22,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:14:22,346 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-08 18:14:22,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:14:22,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1035414710, now seen corresponding path program 2 times [2021-10-08 18:14:22,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:14:22,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064985757] [2021-10-08 18:14:22,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:14:22,349 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:14:22,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:14:22,350 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:14:22,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 18:14:22,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:14:22,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:14:22,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 18:14:22,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:14:22,627 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 50 treesize of output 48 [2021-10-08 18:14:23,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:23,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 18:14:23,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:23,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:23,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 18:14:23,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:23,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:23,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 18:14:23,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 18:14:23,863 INFO L354 Elim1Store]: treesize reduction 87, result has 35.6 percent of original size [2021-10-08 18:14:23,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 93 [2021-10-08 18:14:29,106 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-08 18:14:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 39 [2021-10-08 18:14:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:14:29,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:14:33,603 INFO L354 Elim1Store]: treesize reduction 534, result has 7.1 percent of original size [2021-10-08 18:14:33,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 25060831259 treesize of output 23886426132 Received shutdown request... [2021-10-08 18:26:53,788 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 18:26:53,788 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:26:53,805 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 18:26:53,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-08 18:26:54,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:26:54,010 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. [2021-10-08 18:26:54,012 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:26:54,013 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:26:54,013 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:26:54,013 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:26:54,013 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 18:26:54,013 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 18:26:54,013 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 18:26:54,014 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 18:26:54,014 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 18:26:54,014 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 18:26:54,014 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 18:26:54,014 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 18:26:54,015 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 18:26:54,015 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 18:26:54,015 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:26:54,015 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 18:26:54,015 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 18:26:54,016 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:26:54,016 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:26:54,016 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:26:54,016 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:26:54,023 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 18:26:54,023 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 18:26:54,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 06:26:54 BasicIcfg [2021-10-08 18:26:54,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 18:26:54,026 INFO L168 Benchmark]: Toolchain (without parser) took 865903.56 ms. Allocated memory was 155.2 MB in the beginning and 504.4 MB in the end (delta: 349.2 MB). Free memory was 131.3 MB in the beginning and 326.9 MB in the end (delta: -195.6 MB). Peak memory consumption was 315.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:26:54,026 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 155.2 MB. Free memory was 126.3 MB in the beginning and 126.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 18:26:54,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 431.02 ms. Allocated memory is still 155.2 MB. Free memory was 130.9 MB in the beginning and 118.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-08 18:26:54,027 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.92 ms. Allocated memory is still 155.2 MB. Free memory was 118.3 MB in the beginning and 116.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:26:54,027 INFO L168 Benchmark]: Boogie Preprocessor took 34.29 ms. Allocated memory is still 155.2 MB. Free memory was 116.4 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:26:54,028 INFO L168 Benchmark]: RCFGBuilder took 1197.50 ms. Allocated memory is still 155.2 MB. Free memory was 114.8 MB in the beginning and 124.5 MB in the end (delta: -9.7 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2021-10-08 18:26:54,028 INFO L168 Benchmark]: TraceAbstraction took 864179.76 ms. Allocated memory was 155.2 MB in the beginning and 504.4 MB in the end (delta: 349.2 MB). Free memory was 124.5 MB in the beginning and 326.9 MB in the end (delta: -202.3 MB). Peak memory consumption was 308.2 MB. Max. memory is 8.0 GB. [2021-10-08 18:26:54,030 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 155.2 MB. Free memory was 126.3 MB in the beginning and 126.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 431.02 ms. Allocated memory is still 155.2 MB. Free memory was 130.9 MB in the beginning and 118.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.92 ms. Allocated memory is still 155.2 MB. Free memory was 118.3 MB in the beginning and 116.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.29 ms. Allocated memory is still 155.2 MB. Free memory was 116.4 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1197.50 ms. Allocated memory is still 155.2 MB. Free memory was 114.8 MB in the beginning and 124.5 MB in the end (delta: -9.7 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 864179.76 ms. Allocated memory was 155.2 MB in the beginning and 504.4 MB in the end (delta: 349.2 MB). Free memory was 124.5 MB in the beginning and 326.9 MB in the end (delta: -202.3 MB). Peak memory consumption was 308.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 14872.9ms, 118 PlacesBefore, 37 PlacesAfterwards, 120 TransitionsBefore, 33 TransitionsAfterwards, 660 CoEnabledTransitionPairs, 7 FixpointIterations, 81 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 7 ConcurrentYvCompositions, 6 ChoiceCompositions, 135 TotalNumberOfCompositions, 973 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 923, positive: 907, positive conditional: 0, positive unconditional: 907, 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: 418, positive: 414, positive conditional: 0, positive unconditional: 414, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 418, positive: 414, positive conditional: 0, positive unconditional: 414, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 243, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 243, negative conditional: 0, negative unconditional: 243, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 923, positive: 493, positive conditional: 0, positive unconditional: 493, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 418, unknown conditional: 0, unknown unconditional: 418] , Statistics on independence cache: Total cache size (in pairs): 41, Positive cache size: 40, Positive conditional cache size: 0, Positive unconditional cache size: 40, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-7-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 132 locations, 22 error locations. Started 1 CEGAR loops. OverallTime: 864043.4ms, OverallIterations: 19, TraceHistogramMax: 6, EmptinessCheckTime: 27.7ms, AutomataDifference: 57948.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14942.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 331 SDtfs, 2114 SDslu, 938 SDs, 0 SdLazy, 1352 SolverSat, 88 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 47032.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 28951.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=15, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 171.4ms AutomataMinimizationTime, 18 MinimizatonAttempts, 1575 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 137.9ms SsaConstructionTime, 637.1ms SatisfiabilityAnalysisTime, 33740.5ms InterpolantComputationTime, 118 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 200 ConstructedInterpolants, 26 QuantifiedInterpolants, 4451 SizeOfPredicates, 124 NumberOfNonLiveVariables, 1196 ConjunctsInSsa, 176 ConjunctsInUnsatCore, 36 InterpolantComputations, 20 PerfectInterpolantSequences, 29/108 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown