/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/parallel-parallel-sum-1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 15:49:07,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 15:49:07,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 15:49:07,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-07 15:49:07,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-07 15:49:07,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-07 15:49:07,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-07 15:49:07,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-07 15:49:07,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-07 15:49:07,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-07 15:49:07,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-07 15:49:07,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-07 15:49:07,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 15:49:07,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 15:49:07,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 15:49:07,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 15:49:07,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 15:49:07,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 15:49:07,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 15:49:07,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 15:49:07,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 15:49:07,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 15:49:07,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 15:49:07,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 15:49:07,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 15:49:07,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 15:49:07,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 15:49:07,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 15:49:07,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 15:49:07,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 15:49:07,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 15:49:07,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 15:49:07,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 15:49:07,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 15:49:07,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 15:49:07,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 15:49:07,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 15:49:07,591 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 15:49:07,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 15:49:07,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 15:49:07,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 15:49:07,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 15:49:07,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 15:49:07,598 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 15:49:07,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 15:49:07,599 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 15:49:07,599 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 15:49:07,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 15:49:07,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 15:49:07,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 15:49:07,601 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 15:49:07,601 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 15:49:07,601 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 15:49:07,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 15:49:07,602 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 15:49:07,602 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 15:49:07,602 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 15:49:07,603 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 15:49:07,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 15:49:07,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 15:49:07,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 15:49:07,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 15:49:07,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:49:07,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 15:49:07,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 15:49:07,604 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 15:49:07,604 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 15:49:07,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 15:49:07,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 15:49:07,605 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 15:49:08,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 15:49:08,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 15:49:08,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 15:49:08,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 15:49:08,090 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 15:49:08,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2021-10-07 15:49:08,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52fe96a63/6886c2ae907b4a14a7e652b1cffbf149/FLAGb46fa4b63 [2021-10-07 15:49:08,841 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 15:49:08,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2021-10-07 15:49:08,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52fe96a63/6886c2ae907b4a14a7e652b1cffbf149/FLAGb46fa4b63 [2021-10-07 15:49:09,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52fe96a63/6886c2ae907b4a14a7e652b1cffbf149 [2021-10-07 15:49:09,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 15:49:09,193 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 15:49:09,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 15:49:09,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 15:49:09,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 15:49:09,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cffe7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09, skipping insertion in model container [2021-10-07 15:49:09,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 15:49:09,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:49:09,457 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/parallel-parallel-sum-1.wvr.c[3310,3323] [2021-10-07 15:49:09,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:49:09,496 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 15:49:09,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:49:09,561 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/parallel-parallel-sum-1.wvr.c[3310,3323] [2021-10-07 15:49:09,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:49:09,587 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 15:49:09,644 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/parallel-parallel-sum-1.wvr.c[3310,3323] [2021-10-07 15:49:09,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:49:09,677 INFO L208 MainTranslator]: Completed translation [2021-10-07 15:49:09,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09 WrapperNode [2021-10-07 15:49:09,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 15:49:09,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 15:49:09,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 15:49:09,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 15:49:09,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 15:49:09,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 15:49:09,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 15:49:09,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 15:49:09,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 15:49:09,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 15:49:09,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 15:49:09,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 15:49:09,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (1/1) ... [2021-10-07 15:49:09,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:49:09,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:49:09,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 15:49:09,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 15:49:09,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 15:49:09,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 15:49:09,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 15:49:09,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 15:49:09,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 15:49:09,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 15:49:09,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 15:49:09,940 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 15:49:09,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 15:49:09,940 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-07 15:49:09,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-07 15:49:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 15:49:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 15:49:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 15:49:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 15:49:09,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 15:49:09,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 15:49:09,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 15:49:09,944 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 15:49:11,301 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 15:49:11,301 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-10-07 15:49:11,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:49:11 BoogieIcfgContainer [2021-10-07 15:49:11,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 15:49:11,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 15:49:11,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 15:49:11,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 15:49:11,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:49:09" (1/3) ... [2021-10-07 15:49:11,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e921bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:49:11, skipping insertion in model container [2021-10-07 15:49:11,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:49:09" (2/3) ... [2021-10-07 15:49:11,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e921bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:49:11, skipping insertion in model container [2021-10-07 15:49:11,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:49:11" (3/3) ... [2021-10-07 15:49:11,313 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2021-10-07 15:49:11,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 15:49:11,319 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-07 15:49:11,319 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 15:49:11,359 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,360 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,360 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,360 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,361 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,361 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,361 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,361 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,361 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,362 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,362 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,362 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,362 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,362 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,363 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,363 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,363 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,363 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,363 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,364 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,364 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,364 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,364 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,364 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,365 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,365 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,365 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,365 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,366 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,366 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,366 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,366 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,367 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,367 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,367 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,367 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,368 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,368 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,368 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,368 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,368 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,369 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,370 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,370 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,370 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,370 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,370 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,371 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,371 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,371 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,371 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,372 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,372 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,372 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,372 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,372 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,373 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,373 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,373 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,373 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,374 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,374 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,374 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,374 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,375 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,375 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,375 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,375 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,375 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,376 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,376 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,376 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,376 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,376 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,377 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,377 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,377 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,377 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,378 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,378 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,378 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,378 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,378 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,379 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,379 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,379 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,379 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,380 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,380 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,380 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,380 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,380 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,381 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,381 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,382 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,382 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,382 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,382 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,382 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,383 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,383 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,383 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,383 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,383 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,383 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,384 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,384 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,384 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,384 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,384 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,385 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,385 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,385 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,385 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,385 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,385 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,386 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,386 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,386 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,386 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,387 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,387 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,387 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,387 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,391 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,392 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,392 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,394 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,394 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,394 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,395 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,395 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,395 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,395 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,397 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,397 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,397 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,398 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,398 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,398 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,398 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,400 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,400 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,401 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,401 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,401 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,402 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,402 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:49:11,414 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-07 15:49:11,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 15:49:11,513 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 15:49:11,513 INFO L340 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2021-10-07 15:49:11,548 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 15:49:11,565 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 204 transitions, 440 flow [2021-10-07 15:49:11,574 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 204 transitions, 440 flow [2021-10-07 15:49:11,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 203 places, 204 transitions, 440 flow [2021-10-07 15:49:11,736 INFO L129 PetriNetUnfolder]: 14/200 cut-off events. [2021-10-07 15:49:11,737 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-07 15:49:11,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 200 events. 14/200 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2021-10-07 15:49:11,753 INFO L116 LiptonReduction]: Number of co-enabled transitions 3608 [2021-10-07 15:49:42,947 INFO L131 LiptonReduction]: Checked pairs total: 5030 [2021-10-07 15:49:42,947 INFO L133 LiptonReduction]: Total number of compositions: 212 [2021-10-07 15:49:42,962 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 59 transitions, 150 flow [2021-10-07 15:49:43,068 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1706 states, 1302 states have (on average 5.661290322580645) internal successors, (7371), 1705 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 1706 states, 1302 states have (on average 5.661290322580645) internal successors, (7371), 1705 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:49:43,085 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:43,085 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:49:43,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:49:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash 27792, now seen corresponding path program 1 times [2021-10-07 15:49:43,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:43,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584265925] [2021-10-07 15:49:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:49:43,108 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:43,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:43,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:43,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 15:49:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:49:43,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:49:43,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:43,997 INFO L354 Elim1Store]: treesize reduction 349, result has 18.3 percent of original size [2021-10-07 15:49:43,999 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 6 case distinctions, treesize of input 75 treesize of output 133 [2021-10-07 15:49:44,023 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-07 15:49:44,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 133 [2021-10-07 15:49:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:48,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:48,151 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:48,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584265925] [2021-10-07 15:49:48,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584265925] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:49:48,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:49:48,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:49:48,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523255716] [2021-10-07 15:49:48,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:49:48,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:48,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:49:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:49:48,186 INFO L87 Difference]: Start difference. First operand has 1706 states, 1302 states have (on average 5.661290322580645) internal successors, (7371), 1705 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:48,688 INFO L93 Difference]: Finished difference Result 1448 states and 6089 transitions. [2021-10-07 15:49:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:49:48,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:49:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:48,748 INFO L225 Difference]: With dead ends: 1448 [2021-10-07 15:49:48,748 INFO L226 Difference]: Without dead ends: 1448 [2021-10-07 15:49:48,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:49:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-10-07 15:49:48,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1448. [2021-10-07 15:49:48,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1127 states have (on average 5.402839396628217) internal successors, (6089), 1447 states have internal predecessors, (6089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 6089 transitions. [2021-10-07 15:49:48,927 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 6089 transitions. Word has length 2 [2021-10-07 15:49:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:48,928 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 6089 transitions. [2021-10-07 15:49:48,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 6089 transitions. [2021-10-07 15:49:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:49:48,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:48,929 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:49:48,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:49,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:49,131 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:49:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:49,132 INFO L82 PathProgramCache]: Analyzing trace with hash 27793, now seen corresponding path program 1 times [2021-10-07 15:49:49,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:49,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303098155] [2021-10-07 15:49:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:49:49,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:49,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:49,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:49,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 15:49:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:49:49,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:49:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:49,325 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-10-07 15:49:49,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 80 [2021-10-07 15:49:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:49,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:49,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:49,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303098155] [2021-10-07 15:49:49,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303098155] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:49:49,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:49:49,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:49:49,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383998891] [2021-10-07 15:49:49,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:49:49,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:49,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:49:49,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:49:49,495 INFO L87 Difference]: Start difference. First operand 1448 states and 6089 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:49,789 INFO L93 Difference]: Finished difference Result 1191 states and 4808 transitions. [2021-10-07 15:49:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:49:49,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:49:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:49,806 INFO L225 Difference]: With dead ends: 1191 [2021-10-07 15:49:49,806 INFO L226 Difference]: Without dead ends: 1191 [2021-10-07 15:49:49,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:49:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-10-07 15:49:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1191. [2021-10-07 15:49:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 952 states have (on average 5.050420168067227) internal successors, (4808), 1190 states have internal predecessors, (4808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 4808 transitions. [2021-10-07 15:49:49,911 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 4808 transitions. Word has length 2 [2021-10-07 15:49:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:49,912 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 4808 transitions. [2021-10-07 15:49:49,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 4808 transitions. [2021-10-07 15:49:49,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:49:49,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:49,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:49:49,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:50,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:50,126 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:49:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:50,127 INFO L82 PathProgramCache]: Analyzing trace with hash 27667, now seen corresponding path program 1 times [2021-10-07 15:49:50,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:50,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847431288] [2021-10-07 15:49:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:49:50,129 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:50,130 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:50,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 15:49:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:49:50,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:49:50,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:50,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:49:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:49:50,650 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:49:50,650 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:49:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:50,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:50,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:50,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847431288] [2021-10-07 15:49:50,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847431288] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:49:50,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:49:50,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:49:50,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885447230] [2021-10-07 15:49:50,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:49:50,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:49:50,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:49:50,827 INFO L87 Difference]: Start difference. First operand 1191 states and 4808 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:51,492 INFO L93 Difference]: Finished difference Result 2382 states and 9617 transitions. [2021-10-07 15:49:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:49:51,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:49:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:51,524 INFO L225 Difference]: With dead ends: 2382 [2021-10-07 15:49:51,525 INFO L226 Difference]: Without dead ends: 2382 [2021-10-07 15:49:51,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:49:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-10-07 15:49:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1193. [2021-10-07 15:49:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 954 states have (on average 5.046121593291405) internal successors, (4814), 1192 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 4814 transitions. [2021-10-07 15:49:51,601 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 4814 transitions. Word has length 2 [2021-10-07 15:49:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:51,602 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 4814 transitions. [2021-10-07 15:49:51,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 4814 transitions. [2021-10-07 15:49:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:49:51,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:51,603 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:49:51,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:51,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:51,815 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:49:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash 27668, now seen corresponding path program 1 times [2021-10-07 15:49:51,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:51,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318401041] [2021-10-07 15:49:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:49:51,818 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:51,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:51,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:51,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 15:49:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:49:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:49:51,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:51,976 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-07 15:49:51,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 38 [2021-10-07 15:49:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:52,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:52,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:52,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318401041] [2021-10-07 15:49:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318401041] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:49:52,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:49:52,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:49:52,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182817516] [2021-10-07 15:49:52,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:49:52,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:49:52,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:49:52,011 INFO L87 Difference]: Start difference. First operand 1193 states and 4814 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:52,172 INFO L93 Difference]: Finished difference Result 1192 states and 4811 transitions. [2021-10-07 15:49:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:49:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:49:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:52,188 INFO L225 Difference]: With dead ends: 1192 [2021-10-07 15:49:52,188 INFO L226 Difference]: Without dead ends: 1192 [2021-10-07 15:49:52,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:49:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-10-07 15:49:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1192. [2021-10-07 15:49:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 954 states have (on average 5.0429769392033545) internal successors, (4811), 1191 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 4811 transitions. [2021-10-07 15:49:52,243 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 4811 transitions. Word has length 2 [2021-10-07 15:49:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:52,244 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 4811 transitions. [2021-10-07 15:49:52,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 4811 transitions. [2021-10-07 15:49:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:49:52,245 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:52,245 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 15:49:52,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:52,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:52,453 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:49:52,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash 26701555, now seen corresponding path program 1 times [2021-10-07 15:49:52,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:52,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830087384] [2021-10-07 15:49:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:49:52,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:52,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:52,457 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:52,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 15:49:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:49:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:49:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:49:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:49:52,950 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:49:52,951 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:49:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:53,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:53,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:53,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830087384] [2021-10-07 15:49:53,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830087384] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:53,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:53,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:49:53,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808203277] [2021-10-07 15:49:53,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:49:53,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:53,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:49:53,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:49:53,601 INFO L87 Difference]: Start difference. First operand 1192 states and 4811 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:55,791 INFO L93 Difference]: Finished difference Result 7131 states and 28834 transitions. [2021-10-07 15:49:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:49:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:49:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:55,898 INFO L225 Difference]: With dead ends: 7131 [2021-10-07 15:49:55,898 INFO L226 Difference]: Without dead ends: 7131 [2021-10-07 15:49:55,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 727.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:49:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7131 states. [2021-10-07 15:49:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7131 to 1196. [2021-10-07 15:49:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 958 states have (on average 5.030271398747391) internal successors, (4819), 1195 states have internal predecessors, (4819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 4819 transitions. [2021-10-07 15:49:56,039 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 4819 transitions. Word has length 4 [2021-10-07 15:49:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:56,039 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 4819 transitions. [2021-10-07 15:49:56,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 4819 transitions. [2021-10-07 15:49:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:49:56,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:56,040 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 15:49:56,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:56,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:56,259 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:49:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:56,260 INFO L82 PathProgramCache]: Analyzing trace with hash 26729945, now seen corresponding path program 1 times [2021-10-07 15:49:56,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:56,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947652575] [2021-10-07 15:49:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:49:56,262 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:56,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:56,263 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:56,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 15:49:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:49:56,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:49:56,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:56,831 INFO L354 Elim1Store]: treesize reduction 349, result has 18.3 percent of original size [2021-10-07 15:49:56,832 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 6 case distinctions, treesize of input 63 treesize of output 121 [2021-10-07 15:49:56,842 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 15:49:56,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 122 [2021-10-07 15:50:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:04,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:04,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:04,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947652575] [2021-10-07 15:50:04,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947652575] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:50:04,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:50:04,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:50:04,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891877027] [2021-10-07 15:50:04,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:50:04,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:50:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:04,919 INFO L87 Difference]: Start difference. First operand 1196 states and 4819 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:05,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:05,238 INFO L93 Difference]: Finished difference Result 1128 states and 4555 transitions. [2021-10-07 15:50:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:50:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:50:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:05,246 INFO L225 Difference]: With dead ends: 1128 [2021-10-07 15:50:05,246 INFO L226 Difference]: Without dead ends: 1128 [2021-10-07 15:50:05,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-10-07 15:50:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1128. [2021-10-07 15:50:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 920 states have (on average 4.951086956521739) internal successors, (4555), 1127 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 4555 transitions. [2021-10-07 15:50:05,293 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 4555 transitions. Word has length 4 [2021-10-07 15:50:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:05,294 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 4555 transitions. [2021-10-07 15:50:05,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 4555 transitions. [2021-10-07 15:50:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:50:05,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:05,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 15:50:05,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:05,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:05,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash 26729947, now seen corresponding path program 1 times [2021-10-07 15:50:05,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:05,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57372232] [2021-10-07 15:50:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:05,510 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:05,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:05,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:05,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 15:50:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:50:05,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:05,698 INFO L354 Elim1Store]: treesize reduction 160, result has 17.1 percent of original size [2021-10-07 15:50:05,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 69 [2021-10-07 15:50:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:05,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:06,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:06,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57372232] [2021-10-07 15:50:06,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57372232] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:50:06,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:50:06,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:50:06,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662577470] [2021-10-07 15:50:06,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:50:06,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:06,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:50:06,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:06,022 INFO L87 Difference]: Start difference. First operand 1128 states and 4555 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:06,264 INFO L93 Difference]: Finished difference Result 1060 states and 4291 transitions. [2021-10-07 15:50:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:50:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:50:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:06,272 INFO L225 Difference]: With dead ends: 1060 [2021-10-07 15:50:06,272 INFO L226 Difference]: Without dead ends: 1060 [2021-10-07 15:50:06,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-10-07 15:50:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2021-10-07 15:50:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 882 states have (on average 4.865079365079365) internal successors, (4291), 1059 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 4291 transitions. [2021-10-07 15:50:06,319 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 4291 transitions. Word has length 4 [2021-10-07 15:50:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:06,320 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 4291 transitions. [2021-10-07 15:50:06,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 4291 transitions. [2021-10-07 15:50:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:50:06,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:06,322 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 15:50:06,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:06,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:06,541 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:06,542 INFO L82 PathProgramCache]: Analyzing trace with hash 26729919, now seen corresponding path program 1 times [2021-10-07 15:50:06,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:06,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842505015] [2021-10-07 15:50:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:06,543 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:06,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:06,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:06,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 15:50:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:06,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 15:50:06,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:06,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:06,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:07,111 INFO L354 Elim1Store]: treesize reduction 357, result has 18.7 percent of original size [2021-10-07 15:50:07,112 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 6 case distinctions, treesize of input 28 treesize of output 91 [2021-10-07 15:50:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:07,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:07,511 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:07,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842505015] [2021-10-07 15:50:07,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842505015] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:50:07,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:50:07,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 15:50:07,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395061703] [2021-10-07 15:50:07,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:50:07,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:50:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:50:07,512 INFO L87 Difference]: Start difference. First operand 1060 states and 4291 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) [2021-10-07 15:50:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:09,078 INFO L93 Difference]: Finished difference Result 2017 states and 8389 transitions. [2021-10-07 15:50:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:50:09,078 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 [2021-10-07 15:50:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:09,090 INFO L225 Difference]: With dead ends: 2017 [2021-10-07 15:50:09,090 INFO L226 Difference]: Without dead ends: 2017 [2021-10-07 15:50:09,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:50:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-10-07 15:50:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1550. [2021-10-07 15:50:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1372 states have (on average 5.236880466472303) internal successors, (7185), 1549 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 7185 transitions. [2021-10-07 15:50:09,159 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 7185 transitions. Word has length 4 [2021-10-07 15:50:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:09,159 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 7185 transitions. [2021-10-07 15:50:09,160 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) [2021-10-07 15:50:09,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 7185 transitions. [2021-10-07 15:50:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:50:09,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:09,160 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 15:50:09,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:09,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:09,377 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash 26729920, now seen corresponding path program 1 times [2021-10-07 15:50:09,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:09,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677883447] [2021-10-07 15:50:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:09,379 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:09,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:09,380 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:09,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 15:50:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:09,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:50:09,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:09,559 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-07 15:50:09,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 38 [2021-10-07 15:50:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:09,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:09,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:09,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677883447] [2021-10-07 15:50:09,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677883447] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:50:09,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:50:09,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 15:50:09,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819474847] [2021-10-07 15:50:09,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:50:09,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:50:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:09,615 INFO L87 Difference]: Start difference. First operand 1550 states and 7185 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:09,752 INFO L93 Difference]: Finished difference Result 674 states and 2826 transitions. [2021-10-07 15:50:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:50:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:50:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:09,756 INFO L225 Difference]: With dead ends: 674 [2021-10-07 15:50:09,756 INFO L226 Difference]: Without dead ends: 674 [2021-10-07 15:50:09,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:50:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-10-07 15:50:09,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 674. [2021-10-07 15:50:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 621 states have (on average 4.550724637681159) internal successors, (2826), 673 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2826 transitions. [2021-10-07 15:50:09,778 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2826 transitions. Word has length 4 [2021-10-07 15:50:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:09,779 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 2826 transitions. [2021-10-07 15:50:09,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2826 transitions. [2021-10-07 15:50:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 15:50:09,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:09,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 15:50:09,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:09,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:09,992 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:09,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:09,992 INFO L82 PathProgramCache]: Analyzing trace with hash -82305611, now seen corresponding path program 1 times [2021-10-07 15:50:09,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:09,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64922924] [2021-10-07 15:50:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:09,994 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:09,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:09,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:09,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 15:50:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:10,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:50:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:10,178 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-07 15:50:10,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 57 [2021-10-07 15:50:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:10,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:10,587 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:10,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64922924] [2021-10-07 15:50:10,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64922924] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:50:10,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:50:10,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:50:10,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861833464] [2021-10-07 15:50:10,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:50:10,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:10,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:50:10,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:10,590 INFO L87 Difference]: Start difference. First operand 674 states and 2826 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:10,718 INFO L93 Difference]: Finished difference Result 650 states and 2750 transitions. [2021-10-07 15:50:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:50:10,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 15:50:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:10,727 INFO L225 Difference]: With dead ends: 650 [2021-10-07 15:50:10,727 INFO L226 Difference]: Without dead ends: 650 [2021-10-07 15:50:10,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-10-07 15:50:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2021-10-07 15:50:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 605 states have (on average 4.545454545454546) internal successors, (2750), 649 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2750 transitions. [2021-10-07 15:50:10,754 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2750 transitions. Word has length 6 [2021-10-07 15:50:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:10,755 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 2750 transitions. [2021-10-07 15:50:10,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2750 transitions. [2021-10-07 15:50:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 15:50:10,756 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:10,756 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 15:50:10,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:10,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:10,970 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:10,970 INFO L82 PathProgramCache]: Analyzing trace with hash -82305610, now seen corresponding path program 1 times [2021-10-07 15:50:10,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:10,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688576840] [2021-10-07 15:50:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:10,971 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:10,975 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:11,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 15:50:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:11,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:50:11,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:11,667 INFO L354 Elim1Store]: treesize reduction 349, result has 18.3 percent of original size [2021-10-07 15:50:11,668 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 6 case distinctions, treesize of input 51 treesize of output 109 [2021-10-07 15:50:11,676 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 112 treesize of output 110 [2021-10-07 15:50:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:21,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:21,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:21,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688576840] [2021-10-07 15:50:21,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688576840] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:50:21,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:50:21,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:50:21,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985612834] [2021-10-07 15:50:21,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:50:21,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:50:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:21,210 INFO L87 Difference]: Start difference. First operand 650 states and 2750 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:21,442 INFO L93 Difference]: Finished difference Result 626 states and 2674 transitions. [2021-10-07 15:50:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:50:21,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 15:50:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:21,446 INFO L225 Difference]: With dead ends: 626 [2021-10-07 15:50:21,446 INFO L226 Difference]: Without dead ends: 626 [2021-10-07 15:50:21,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-10-07 15:50:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2021-10-07 15:50:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 589 states have (on average 4.539898132427844) internal successors, (2674), 625 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2674 transitions. [2021-10-07 15:50:21,468 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2674 transitions. Word has length 6 [2021-10-07 15:50:21,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:21,468 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 2674 transitions. [2021-10-07 15:50:21,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2674 transitions. [2021-10-07 15:50:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 15:50:21,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:21,470 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-10-07 15:50:21,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:21,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:21,683 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:21,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:21,684 INFO L82 PathProgramCache]: Analyzing trace with hash -82286689, now seen corresponding path program 1 times [2021-10-07 15:50:21,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:21,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962290610] [2021-10-07 15:50:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:21,685 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:21,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:21,686 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:21,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 15:50:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:21,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 15:50:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:21,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:22,161 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:50:22,161 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:50:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:50:22,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:22,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:22,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962290610] [2021-10-07 15:50:22,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962290610] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 15:50:22,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:50:22,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2021-10-07 15:50:22,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101608902] [2021-10-07 15:50:22,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:50:22,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:50:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:50:22,839 INFO L87 Difference]: Start difference. First operand 626 states and 2674 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:23,165 INFO L93 Difference]: Finished difference Result 827 states and 3195 transitions. [2021-10-07 15:50:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:50:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 15:50:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:23,169 INFO L225 Difference]: With dead ends: 827 [2021-10-07 15:50:23,169 INFO L226 Difference]: Without dead ends: 827 [2021-10-07 15:50:23,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:50:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-10-07 15:50:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 789. [2021-10-07 15:50:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 752 states have (on average 4.2087765957446805) internal successors, (3165), 788 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 3165 transitions. [2021-10-07 15:50:23,197 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 3165 transitions. Word has length 6 [2021-10-07 15:50:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:23,198 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 3165 transitions. [2021-10-07 15:50:23,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 3165 transitions. [2021-10-07 15:50:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:50:23,199 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:23,199 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-07 15:50:23,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:23,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:23,411 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash 927808566, now seen corresponding path program 1 times [2021-10-07 15:50:23,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:23,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026385936] [2021-10-07 15:50:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:23,414 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:23,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:23,415 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:23,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 15:50:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:23,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 15:50:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:23,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:23,901 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:50:23,902 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:50:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:50:24,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:24,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:24,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026385936] [2021-10-07 15:50:24,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026385936] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:24,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:24,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-10-07 15:50:24,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993969931] [2021-10-07 15:50:24,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:50:24,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:50:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:50:24,772 INFO L87 Difference]: Start difference. First operand 789 states and 3165 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:25,987 INFO L93 Difference]: Finished difference Result 1028 states and 3820 transitions. [2021-10-07 15:50:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:50:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 15:50:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:26,005 INFO L225 Difference]: With dead ends: 1028 [2021-10-07 15:50:26,005 INFO L226 Difference]: Without dead ends: 1028 [2021-10-07 15:50:26,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 654.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:50:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-10-07 15:50:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 864. [2021-10-07 15:50:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 827 states have (on average 4.243047158403869) internal successors, (3509), 863 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 3509 transitions. [2021-10-07 15:50:26,038 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 3509 transitions. Word has length 7 [2021-10-07 15:50:26,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:26,039 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 3509 transitions. [2021-10-07 15:50:26,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 3509 transitions. [2021-10-07 15:50:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:50:26,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:26,040 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 15:50:26,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:26,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:26,253 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:26,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2146186061, now seen corresponding path program 2 times [2021-10-07 15:50:26,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:26,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794237050] [2021-10-07 15:50:26,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:50:26,256 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:26,257 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:26,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 15:50:26,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:50:26,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:50:26,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 15:50:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:26,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:26,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:26,862 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:50:26,863 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:50:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:27,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:28,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:28,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794237050] [2021-10-07 15:50:28,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794237050] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:28,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:28,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:50:28,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276377453] [2021-10-07 15:50:28,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:50:28,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:28,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:50:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:50:28,659 INFO L87 Difference]: Start difference. First operand 864 states and 3509 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) [2021-10-07 15:50:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:38,093 INFO L93 Difference]: Finished difference Result 7823 states and 33074 transitions. [2021-10-07 15:50:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:50:38,094 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 [2021-10-07 15:50:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:38,142 INFO L225 Difference]: With dead ends: 7823 [2021-10-07 15:50:38,142 INFO L226 Difference]: Without dead ends: 7823 [2021-10-07 15:50:38,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5785.5ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:50:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7823 states. [2021-10-07 15:50:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7823 to 872. [2021-10-07 15:50:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 835 states have (on average 4.221556886227545) internal successors, (3525), 871 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 3525 transitions. [2021-10-07 15:50:38,273 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 3525 transitions. Word has length 8 [2021-10-07 15:50:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:38,273 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 3525 transitions. [2021-10-07 15:50:38,273 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) [2021-10-07 15:50:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 3525 transitions. [2021-10-07 15:50:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:50:38,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:38,276 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-07 15:50:38,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:38,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:38,491 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:38,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2118976897, now seen corresponding path program 2 times [2021-10-07 15:50:38,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:38,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959389016] [2021-10-07 15:50:38,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:50:38,493 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:38,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:38,494 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:38,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 15:50:38,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:50:38,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:50:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 15:50:38,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:38,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:38,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:39,071 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:50:39,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:50:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:39,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:40,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:40,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959389016] [2021-10-07 15:50:40,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959389016] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:40,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:40,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 15:50:40,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657210614] [2021-10-07 15:50:40,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:50:40,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:50:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:50:40,559 INFO L87 Difference]: Start difference. First operand 872 states and 3525 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:42,612 INFO L93 Difference]: Finished difference Result 1437 states and 5233 transitions. [2021-10-07 15:50:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:50:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 15:50:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:42,617 INFO L225 Difference]: With dead ends: 1437 [2021-10-07 15:50:42,617 INFO L226 Difference]: Without dead ends: 1437 [2021-10-07 15:50:42,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1404.0ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:50:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-10-07 15:50:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 991. [2021-10-07 15:50:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 954 states have (on average 4.290356394129979) internal successors, (4093), 990 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4093 transitions. [2021-10-07 15:50:42,657 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4093 transitions. Word has length 8 [2021-10-07 15:50:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:42,658 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 4093 transitions. [2021-10-07 15:50:42,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4093 transitions. [2021-10-07 15:50:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:50:42,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:42,659 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:42,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:42,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:42,873 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:42,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1786261890, now seen corresponding path program 1 times [2021-10-07 15:50:42,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:42,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129078904] [2021-10-07 15:50:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:42,875 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:42,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:42,877 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:42,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 15:50:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:43,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 15:50:43,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:43,488 INFO L354 Elim1Store]: treesize reduction 357, result has 18.7 percent of original size [2021-10-07 15:50:43,489 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 6 case distinctions, treesize of input 28 treesize of output 91 [2021-10-07 15:50:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:43,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:44,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:44,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129078904] [2021-10-07 15:50:44,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129078904] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:50:44,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:50:44,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 15:50:44,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874673948] [2021-10-07 15:50:44,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:50:44,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:50:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:50:44,019 INFO L87 Difference]: Start difference. First operand 991 states and 4093 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:45,168 INFO L93 Difference]: Finished difference Result 1774 states and 7461 transitions. [2021-10-07 15:50:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:50:45,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 15:50:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:45,174 INFO L225 Difference]: With dead ends: 1774 [2021-10-07 15:50:45,175 INFO L226 Difference]: Without dead ends: 1774 [2021-10-07 15:50:45,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:50:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-10-07 15:50:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1563. [2021-10-07 15:50:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1526 states have (on average 4.565530799475754) internal successors, (6967), 1562 states have internal predecessors, (6967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:45,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 6967 transitions. [2021-10-07 15:50:45,234 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 6967 transitions. Word has length 8 [2021-10-07 15:50:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:45,234 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 6967 transitions. [2021-10-07 15:50:45,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:45,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 6967 transitions. [2021-10-07 15:50:45,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:50:45,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:45,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:45,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:45,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:45,451 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1786261823, now seen corresponding path program 1 times [2021-10-07 15:50:45,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:45,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331076592] [2021-10-07 15:50:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:45,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:45,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:45,454 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:45,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 15:50:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:50:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:46,022 INFO L354 Elim1Store]: treesize reduction 361, result has 15.5 percent of original size [2021-10-07 15:50:46,023 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 6 case distinctions, treesize of input 47 treesize of output 93 [2021-10-07 15:50:46,029 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 97 treesize of output 95 [2021-10-07 15:50:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:49,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:49,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:49,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331076592] [2021-10-07 15:50:49,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331076592] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:50:49,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:50:49,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:50:49,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180383644] [2021-10-07 15:50:49,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:50:49,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:50:49,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:49,197 INFO L87 Difference]: Start difference. First operand 1563 states and 6967 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:49,354 INFO L93 Difference]: Finished difference Result 1448 states and 6413 transitions. [2021-10-07 15:50:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:50:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 15:50:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:49,360 INFO L225 Difference]: With dead ends: 1448 [2021-10-07 15:50:49,360 INFO L226 Difference]: Without dead ends: 1448 [2021-10-07 15:50:49,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2082.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:50:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-10-07 15:50:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1448. [2021-10-07 15:50:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1421 states have (on average 4.513019000703729) internal successors, (6413), 1447 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 6413 transitions. [2021-10-07 15:50:49,419 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 6413 transitions. Word has length 8 [2021-10-07 15:50:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:49,419 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 6413 transitions. [2021-10-07 15:50:49,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 6413 transitions. [2021-10-07 15:50:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:50:49,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:49,423 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:49,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-07 15:50:49,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:49,637 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1786261822, now seen corresponding path program 1 times [2021-10-07 15:50:49,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:49,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567922070] [2021-10-07 15:50:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:49,639 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:49,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:49,640 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:49,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 15:50:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:50:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:49,908 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-07 15:50:49,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 38 [2021-10-07 15:50:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:49,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:49,988 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:49,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567922070] [2021-10-07 15:50:49,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567922070] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:50:49,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:50:49,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:50:49,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634988316] [2021-10-07 15:50:49,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:50:49,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:50:49,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:50:49,990 INFO L87 Difference]: Start difference. First operand 1448 states and 6413 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:50,089 INFO L93 Difference]: Finished difference Result 1333 states and 5859 transitions. [2021-10-07 15:50:50,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:50:50,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 8 [2021-10-07 15:50:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:50,095 INFO L225 Difference]: With dead ends: 1333 [2021-10-07 15:50:50,096 INFO L226 Difference]: Without dead ends: 1333 [2021-10-07 15:50:50,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:50:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-10-07 15:50:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1333. [2021-10-07 15:50:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1316 states have (on average 4.452127659574468) internal successors, (5859), 1332 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 5859 transitions. [2021-10-07 15:50:50,131 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 5859 transitions. Word has length 8 [2021-10-07 15:50:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:50,132 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 5859 transitions. [2021-10-07 15:50:50,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 5859 transitions. [2021-10-07 15:50:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:50:50,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:50,133 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2021-10-07 15:50:50,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:50,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:50,346 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:50,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2080045738, now seen corresponding path program 3 times [2021-10-07 15:50:50,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:50,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037531166] [2021-10-07 15:50:50,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:50:50,347 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:50,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:50,349 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:50,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 15:50:50,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:50:50,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:50:50,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 15:50:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:51,042 INFO L354 Elim1Store]: treesize reduction 357, result has 18.7 percent of original size [2021-10-07 15:50:51,042 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 6 case distinctions, treesize of input 28 treesize of output 91 [2021-10-07 15:50:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:50:51,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:50:52,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:52,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037531166] [2021-10-07 15:50:52,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037531166] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:52,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:52,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 15:50:52,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946663559] [2021-10-07 15:50:52,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:50:52,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:52,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:50:52,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:50:52,399 INFO L87 Difference]: Start difference. First operand 1333 states and 5859 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:59,332 INFO L93 Difference]: Finished difference Result 2898 states and 12018 transitions. [2021-10-07 15:50:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:50:59,333 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 9 [2021-10-07 15:50:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:59,342 INFO L225 Difference]: With dead ends: 2898 [2021-10-07 15:50:59,342 INFO L226 Difference]: Without dead ends: 2898 [2021-10-07 15:50:59,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1764.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:50:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-10-07 15:50:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2021. [2021-10-07 15:50:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2004 states have (on average 4.666167664670659) internal successors, (9351), 2020 states have internal predecessors, (9351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 9351 transitions. [2021-10-07 15:50:59,414 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 9351 transitions. Word has length 9 [2021-10-07 15:50:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:59,415 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 9351 transitions. [2021-10-07 15:50:59,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 9351 transitions. [2021-10-07 15:50:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 15:50:59,416 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:59,416 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:59,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:59,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:59,630 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:50:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash 147401461, now seen corresponding path program 1 times [2021-10-07 15:50:59,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:59,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837729929] [2021-10-07 15:50:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:50:59,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:59,634 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:59,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 15:50:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:59,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 15:50:59,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:59,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:50:59,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:51:00,238 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:51:00,239 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:51:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:51:00,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:01,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:01,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837729929] [2021-10-07 15:51:01,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837729929] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:01,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:01,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-10-07 15:51:01,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262714045] [2021-10-07 15:51:01,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:51:01,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:51:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:51:01,435 INFO L87 Difference]: Start difference. First operand 2021 states and 9351 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:02,458 INFO L93 Difference]: Finished difference Result 2129 states and 9581 transitions. [2021-10-07 15:51:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:51:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 15:51:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:02,466 INFO L225 Difference]: With dead ends: 2129 [2021-10-07 15:51:02,466 INFO L226 Difference]: Without dead ends: 2129 [2021-10-07 15:51:02,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 704.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:51:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-10-07 15:51:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2020. [2021-10-07 15:51:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2003 states have (on average 4.667998002995507) internal successors, (9350), 2019 states have internal predecessors, (9350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 9350 transitions. [2021-10-07 15:51:02,525 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 9350 transitions. Word has length 11 [2021-10-07 15:51:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:02,526 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 9350 transitions. [2021-10-07 15:51:02,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 9350 transitions. [2021-10-07 15:51:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:51:02,527 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:02,527 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:02,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 15:51:02,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:02,741 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:51:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash 304389310, now seen corresponding path program 2 times [2021-10-07 15:51:02,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:02,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894265701] [2021-10-07 15:51:02,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:51:02,743 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:02,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:02,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:02,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 15:51:02,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:51:02,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-07 15:51:03,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:03,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:51:03,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:51:03,364 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:51:03,365 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:51:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:03,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:05,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:05,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894265701] [2021-10-07 15:51:05,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894265701] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:05,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:05,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 15:51:05,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112031057] [2021-10-07 15:51:05,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:51:05,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:51:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:51:05,471 INFO L87 Difference]: Start difference. First operand 2020 states and 9350 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:15,556 INFO L93 Difference]: Finished difference Result 4424 states and 20112 transitions. [2021-10-07 15:51:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:51:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 15:51:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:15,570 INFO L225 Difference]: With dead ends: 4424 [2021-10-07 15:51:15,570 INFO L226 Difference]: Without dead ends: 4424 [2021-10-07 15:51:15,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 5077.6ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:51:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-10-07 15:51:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 2133. [2021-10-07 15:51:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2116 states have (on average 4.675330812854442) internal successors, (9893), 2132 states have internal predecessors, (9893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9893 transitions. [2021-10-07 15:51:15,686 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9893 transitions. Word has length 12 [2021-10-07 15:51:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:15,686 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 9893 transitions. [2021-10-07 15:51:15,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9893 transitions. [2021-10-07 15:51:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:51:15,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:15,688 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1] [2021-10-07 15:51:15,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 15:51:15,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:15,902 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:51:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:15,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1215266198, now seen corresponding path program 4 times [2021-10-07 15:51:15,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:15,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287007293] [2021-10-07 15:51:15,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:51:15,904 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:15,906 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:15,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 15:51:16,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:51:16,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 15:51:16,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:51:16,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:51:16,520 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:51:16,520 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:51:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:51:16,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:19,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:19,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287007293] [2021-10-07 15:51:19,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287007293] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:19,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:19,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 19 [2021-10-07 15:51:19,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455559910] [2021-10-07 15:51:19,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:51:19,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:51:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:51:19,314 INFO L87 Difference]: Start difference. First operand 2133 states and 9893 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:23,021 INFO L93 Difference]: Finished difference Result 3351 states and 14363 transitions. [2021-10-07 15:51:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:51:23,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 15:51:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:23,032 INFO L225 Difference]: With dead ends: 3351 [2021-10-07 15:51:23,032 INFO L226 Difference]: Without dead ends: 3351 [2021-10-07 15:51:23,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3075.4ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:51:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-10-07 15:51:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 2700. [2021-10-07 15:51:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2683 states have (on average 4.705553484904957) internal successors, (12625), 2699 states have internal predecessors, (12625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 12625 transitions. [2021-10-07 15:51:23,132 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 12625 transitions. Word has length 13 [2021-10-07 15:51:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:23,132 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 12625 transitions. [2021-10-07 15:51:23,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 12625 transitions. [2021-10-07 15:51:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:51:23,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:23,135 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1] [2021-10-07 15:51:23,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 15:51:23,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:23,344 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:51:23,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:23,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1756733727, now seen corresponding path program 5 times [2021-10-07 15:51:23,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:23,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362990360] [2021-10-07 15:51:23,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:51:23,347 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:23,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:23,349 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:23,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 15:51:23,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:51:23,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-07 15:51:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:23,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:51:23,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:51:24,105 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:51:24,106 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:51:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:51:24,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:28,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:28,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362990360] [2021-10-07 15:51:28,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362990360] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:28,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:28,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2021-10-07 15:51:28,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625831978] [2021-10-07 15:51:28,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:51:28,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:51:28,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:51:28,130 INFO L87 Difference]: Start difference. First operand 2700 states and 12625 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:52:35,175 INFO L93 Difference]: Finished difference Result 10699 states and 46684 transitions. [2021-10-07 15:52:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-07 15:52:35,178 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:52:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:52:35,234 INFO L225 Difference]: With dead ends: 10699 [2021-10-07 15:52:35,234 INFO L226 Difference]: Without dead ends: 10699 [2021-10-07 15:52:35,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 31249.4ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-10-07 15:52:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10699 states. [2021-10-07 15:52:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10699 to 3100. [2021-10-07 15:52:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 3083 states have (on average 4.757379176127149) internal successors, (14667), 3099 states have internal predecessors, (14667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 14667 transitions. [2021-10-07 15:52:35,418 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 14667 transitions. Word has length 14 [2021-10-07 15:52:35,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:52:35,419 INFO L470 AbstractCegarLoop]: Abstraction has 3100 states and 14667 transitions. [2021-10-07 15:52:35,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 14667 transitions. [2021-10-07 15:52:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:52:35,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:52:35,421 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:52:35,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 15:52:35,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:52:35,621 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:52:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:52:35,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1387602210, now seen corresponding path program 3 times [2021-10-07 15:52:35,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:52:35,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899355785] [2021-10-07 15:52:35,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:52:35,624 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:52:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:52:35,625 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:52:35,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 15:52:36,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:52:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:52:36,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 15:52:36,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:52:36,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:52:36,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:52:36,471 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:52:36,472 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:52:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:37,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:52:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:38,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:52:38,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899355785] [2021-10-07 15:52:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899355785] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:52:38,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:52:38,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 15:52:38,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376461446] [2021-10-07 15:52:38,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:52:38,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:52:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:52:38,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:52:38,560 INFO L87 Difference]: Start difference. First operand 3100 states and 14667 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:52:53,293 INFO L93 Difference]: Finished difference Result 4705 states and 20348 transitions. [2021-10-07 15:52:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:52:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:52:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:52:53,311 INFO L225 Difference]: With dead ends: 4705 [2021-10-07 15:52:53,312 INFO L226 Difference]: Without dead ends: 4705 [2021-10-07 15:52:53,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 4913.5ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:52:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4705 states. [2021-10-07 15:52:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4705 to 3760. [2021-10-07 15:52:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3760 states, 3743 states have (on average 4.736574939887791) internal successors, (17729), 3759 states have internal predecessors, (17729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 17729 transitions. [2021-10-07 15:52:53,451 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 17729 transitions. Word has length 14 [2021-10-07 15:52:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:52:53,451 INFO L470 AbstractCegarLoop]: Abstraction has 3760 states and 17729 transitions. [2021-10-07 15:52:53,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 17729 transitions. [2021-10-07 15:52:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:52:53,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:52:53,456 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:52:53,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 15:52:53,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:52:53,669 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:52:53,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:52:53,670 INFO L82 PathProgramCache]: Analyzing trace with hash 993226425, now seen corresponding path program 4 times [2021-10-07 15:52:53,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:52:53,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724287592] [2021-10-07 15:52:53,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:52:53,672 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:52:53,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:52:53,673 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:52:53,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 15:52:54,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:52:54,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:52:54,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 15:52:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:52:54,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:52:54,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:52:54,521 INFO L354 Elim1Store]: treesize reduction 357, result has 18.7 percent of original size [2021-10-07 15:52:54,522 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 6 case distinctions, treesize of input 28 treesize of output 91 [2021-10-07 15:52:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:52:54,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:52:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:52:56,197 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:52:56,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724287592] [2021-10-07 15:52:56,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724287592] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:52:56,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:52:56,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:52:56,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240538692] [2021-10-07 15:52:56,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:52:56,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:52:56,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:52:56,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:52:56,202 INFO L87 Difference]: Start difference. First operand 3760 states and 17729 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:53:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:53:08,542 INFO L93 Difference]: Finished difference Result 8624 states and 40185 transitions. [2021-10-07 15:53:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:53:08,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:53:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:53:08,577 INFO L225 Difference]: With dead ends: 8624 [2021-10-07 15:53:08,577 INFO L226 Difference]: Without dead ends: 8624 [2021-10-07 15:53:08,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2557.2ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:53:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8624 states. [2021-10-07 15:53:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8624 to 5801. [2021-10-07 15:53:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5801 states, 5784 states have (on average 4.946403872752421) internal successors, (28610), 5800 states have internal predecessors, (28610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:53:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5801 states to 5801 states and 28610 transitions. [2021-10-07 15:53:08,920 INFO L78 Accepts]: Start accepts. Automaton has 5801 states and 28610 transitions. Word has length 15 [2021-10-07 15:53:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:53:08,921 INFO L470 AbstractCegarLoop]: Abstraction has 5801 states and 28610 transitions. [2021-10-07 15:53:08,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:53:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 5801 states and 28610 transitions. [2021-10-07 15:53:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:53:08,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:53:08,930 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 15:53:08,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 15:53:09,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:53:09,131 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:53:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:53:09,132 INFO L82 PathProgramCache]: Analyzing trace with hash -607262669, now seen corresponding path program 3 times [2021-10-07 15:53:09,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:53:09,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836598304] [2021-10-07 15:53:09,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:53:09,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:53:09,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:53:09,135 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:53:09,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 15:53:09,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 15:53:09,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:53:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 15:53:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:53:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:53:09,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:53:10,112 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:53:10,113 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:53:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:53:10,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:53:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:53:16,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:53:16,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836598304] [2021-10-07 15:53:16,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836598304] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:53:16,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:53:16,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:53:16,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922175274] [2021-10-07 15:53:16,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:53:16,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:53:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:53:16,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:53:16,504 INFO L87 Difference]: Start difference. First operand 5801 states and 28610 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:53:26,865 WARN L207 SmtUtils]: Spent 7.28 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 15:53:34,416 WARN L207 SmtUtils]: Spent 6.54 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 15:53:41,252 WARN L207 SmtUtils]: Spent 5.95 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 15:53:47,494 WARN L207 SmtUtils]: Spent 5.17 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-07 15:54:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:54:17,940 INFO L93 Difference]: Finished difference Result 89965 states and 449465 transitions. [2021-10-07 15:54:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:54:17,944 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:54:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:54:19,462 INFO L225 Difference]: With dead ends: 89965 [2021-10-07 15:54:19,463 INFO L226 Difference]: Without dead ends: 89965 [2021-10-07 15:54:19,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 49478.2ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:54:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89965 states. [2021-10-07 15:54:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89965 to 5817. [2021-10-07 15:54:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5817 states, 5800 states have (on average 4.9382758620689655) internal successors, (28642), 5816 states have internal predecessors, (28642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:54:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5817 states to 5817 states and 28642 transitions. [2021-10-07 15:54:21,374 INFO L78 Accepts]: Start accepts. Automaton has 5817 states and 28642 transitions. Word has length 16 [2021-10-07 15:54:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:54:21,374 INFO L470 AbstractCegarLoop]: Abstraction has 5817 states and 28642 transitions. [2021-10-07 15:54:21,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:54:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 5817 states and 28642 transitions. [2021-10-07 15:54:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:54:21,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:54:21,391 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2021-10-07 15:54:21,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-07 15:54:21,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:54:21,606 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:54:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:54:21,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2021610495, now seen corresponding path program 6 times [2021-10-07 15:54:21,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:54:21,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753828833] [2021-10-07 15:54:21,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:54:21,608 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:54:21,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:54:21,609 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:54:21,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 15:54:22,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:54:22,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:54:22,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-07 15:54:22,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:54:22,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:54:22,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:54:22,578 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:54:22,579 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:54:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:54:23,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:54:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:54:27,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:54:27,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753828833] [2021-10-07 15:54:27,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753828833] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:54:27,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:54:27,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 15:54:27,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687488406] [2021-10-07 15:54:27,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-07 15:54:27,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:54:27,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-07 15:54:27,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:54:27,297 INFO L87 Difference]: Start difference. First operand 5817 states and 28642 transitions. Second operand has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:54:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:54:41,265 INFO L93 Difference]: Finished difference Result 14362 states and 62873 transitions. [2021-10-07 15:54:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:54:41,265 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:54:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:54:41,319 INFO L225 Difference]: With dead ends: 14362 [2021-10-07 15:54:41,320 INFO L226 Difference]: Without dead ends: 14362 [2021-10-07 15:54:41,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 8518.3ms TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2021-10-07 15:54:41,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14362 states. [2021-10-07 15:54:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14362 to 6567. [2021-10-07 15:54:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6567 states, 6550 states have (on average 4.977709923664122) internal successors, (32604), 6566 states have internal predecessors, (32604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:54:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6567 states to 6567 states and 32604 transitions. [2021-10-07 15:54:41,552 INFO L78 Accepts]: Start accepts. Automaton has 6567 states and 32604 transitions. Word has length 16 [2021-10-07 15:54:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:54:41,552 INFO L470 AbstractCegarLoop]: Abstraction has 6567 states and 32604 transitions. [2021-10-07 15:54:41,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:54:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6567 states and 32604 transitions. [2021-10-07 15:54:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:54:41,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:54:41,558 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2021-10-07 15:54:41,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-10-07 15:54:41,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:54:41,773 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:54:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:54:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash 983603158, now seen corresponding path program 7 times [2021-10-07 15:54:41,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:54:41,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344254860] [2021-10-07 15:54:41,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:54:41,837 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:54:41,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:54:41,838 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:54:41,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 15:54:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:54:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-07 15:54:42,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:54:42,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:54:42,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:54:42,671 INFO L354 Elim1Store]: treesize reduction 357, result has 18.7 percent of original size [2021-10-07 15:54:42,671 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 6 case distinctions, treesize of input 28 treesize of output 91 [2021-10-07 15:54:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-07 15:54:43,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:54:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-07 15:54:45,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:54:45,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344254860] [2021-10-07 15:54:45,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344254860] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:54:45,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:54:45,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 15:54:45,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396845358] [2021-10-07 15:54:45,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:54:45,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:54:45,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:54:45,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:54:45,956 INFO L87 Difference]: Start difference. First operand 6567 states and 32604 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2021-10-07 15:55:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:55:47,820 INFO L93 Difference]: Finished difference Result 22794 states and 107139 transitions. [2021-10-07 15:55:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:55:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 17 [2021-10-07 15:55:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:55:47,971 INFO L225 Difference]: With dead ends: 22794 [2021-10-07 15:55:47,971 INFO L226 Difference]: Without dead ends: 22794 [2021-10-07 15:55:47,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 12804.6ms TimeCoverageRelationStatistics Valid=402, Invalid=1004, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:55:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22794 states. [2021-10-07 15:55:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22794 to 9734. [2021-10-07 15:55:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 9717 states have (on average 5.261809200370485) internal successors, (51129), 9733 states have internal predecessors, (51129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:55:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 51129 transitions. [2021-10-07 15:55:48,447 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 51129 transitions. Word has length 17 [2021-10-07 15:55:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:55:48,447 INFO L470 AbstractCegarLoop]: Abstraction has 9734 states and 51129 transitions. [2021-10-07 15:55:48,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2021-10-07 15:55:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 51129 transitions. [2021-10-07 15:55:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:55:48,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:55:48,455 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:55:48,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-07 15:55:48,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:55:48,656 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:55:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:55:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash -483907138, now seen corresponding path program 5 times [2021-10-07 15:55:48,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:55:48,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747333848] [2021-10-07 15:55:48,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:55:48,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:55:48,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:55:48,661 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:55:48,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 15:55:49,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-07 15:55:49,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:55:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-07 15:55:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:55:49,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:55:49,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:55:49,616 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:55:49,616 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:55:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:55:50,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:55:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:55:55,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:55:55,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747333848] [2021-10-07 15:55:55,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747333848] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:55:55,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:55:55,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 27 [2021-10-07 15:55:55,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388501654] [2021-10-07 15:55:55,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:55:55,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:55:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:55:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:55:55,198 INFO L87 Difference]: Start difference. First operand 9734 states and 51129 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:56:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:56:38,488 INFO L93 Difference]: Finished difference Result 23090 states and 116696 transitions. [2021-10-07 15:56:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:56:38,491 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-07 15:56:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:56:38,718 INFO L225 Difference]: With dead ends: 23090 [2021-10-07 15:56:38,718 INFO L226 Difference]: Without dead ends: 23090 [2021-10-07 15:56:38,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 20792.3ms TimeCoverageRelationStatistics Valid=517, Invalid=2033, Unknown=0, NotChecked=0, Total=2550 [2021-10-07 15:56:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23090 states. [2021-10-07 15:56:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23090 to 15669. [2021-10-07 15:56:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15669 states, 15652 states have (on average 5.400332225913621) internal successors, (84526), 15668 states have internal predecessors, (84526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:56:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15669 states to 15669 states and 84526 transitions. [2021-10-07 15:56:39,375 INFO L78 Accepts]: Start accepts. Automaton has 15669 states and 84526 transitions. Word has length 20 [2021-10-07 15:56:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:56:39,375 INFO L470 AbstractCegarLoop]: Abstraction has 15669 states and 84526 transitions. [2021-10-07 15:56:39,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:56:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 15669 states and 84526 transitions. [2021-10-07 15:56:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:56:39,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:56:39,389 INFO L512 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1] [2021-10-07 15:56:39,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-07 15:56:39,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:56:39,601 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:56:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:56:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash -605539180, now seen corresponding path program 1 times [2021-10-07 15:56:39,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:56:39,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822798256] [2021-10-07 15:56:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:56:39,603 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:56:39,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:56:39,605 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:56:39,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 15:56:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:56:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 15:56:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:56:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:56:40,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:56:40,416 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:56:40,416 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:56:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:56:41,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:56:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:56:47,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:56:47,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822798256] [2021-10-07 15:56:47,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822798256] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:56:47,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:56:47,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 34 [2021-10-07 15:56:47,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533335959] [2021-10-07 15:56:47,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-07 15:56:47,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:56:47,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-07 15:56:47,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:56:47,978 INFO L87 Difference]: Start difference. First operand 15669 states and 84526 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:09,699 INFO L93 Difference]: Finished difference Result 24088 states and 110471 transitions. [2021-10-07 15:57:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-07 15:57:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 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 22 [2021-10-07 15:57:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:09,804 INFO L225 Difference]: With dead ends: 24088 [2021-10-07 15:57:09,804 INFO L226 Difference]: Without dead ends: 24088 [2021-10-07 15:57:09,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 13458.5ms TimeCoverageRelationStatistics Valid=626, Invalid=3406, Unknown=0, NotChecked=0, Total=4032 [2021-10-07 15:57:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24088 states. [2021-10-07 15:57:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24088 to 11401. [2021-10-07 15:57:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11401 states, 11384 states have (on average 5.2352424455375965) internal successors, (59598), 11400 states have internal predecessors, (59598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11401 states to 11401 states and 59598 transitions. [2021-10-07 15:57:10,356 INFO L78 Accepts]: Start accepts. Automaton has 11401 states and 59598 transitions. Word has length 22 [2021-10-07 15:57:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:10,356 INFO L470 AbstractCegarLoop]: Abstraction has 11401 states and 59598 transitions. [2021-10-07 15:57:10,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 11401 states and 59598 transitions. [2021-10-07 15:57:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:57:10,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:10,366 INFO L512 BasicCegarLoop]: trace histogram [9, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:57:10,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-07 15:57:10,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:10,567 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:57:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1343251678, now seen corresponding path program 6 times [2021-10-07 15:57:10,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:10,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453040167] [2021-10-07 15:57:10,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:57:10,569 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:10,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:10,570 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:10,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-07 15:57:11,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 15:57:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:57:11,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-07 15:57:11,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:11,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:57:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:57:11,976 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:57:11,977 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:57:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:12,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:18,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:18,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453040167] [2021-10-07 15:57:18,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453040167] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:57:18,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:57:18,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2021-10-07 15:57:18,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273261991] [2021-10-07 15:57:18,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-07 15:57:18,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:18,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-07 15:57:18,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:57:18,375 INFO L87 Difference]: Start difference. First operand 11401 states and 59598 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:01,180 INFO L93 Difference]: Finished difference Result 27203 states and 136109 transitions. [2021-10-07 15:58:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-07 15:58:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 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 22 [2021-10-07 15:58:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:01,462 INFO L225 Difference]: With dead ends: 27203 [2021-10-07 15:58:01,462 INFO L226 Difference]: Without dead ends: 27203 [2021-10-07 15:58:01,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 18629.5ms TimeCoverageRelationStatistics Valid=823, Invalid=3083, Unknown=0, NotChecked=0, Total=3906 [2021-10-07 15:58:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27203 states. [2021-10-07 15:58:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27203 to 19898. [2021-10-07 15:58:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19898 states, 19881 states have (on average 5.400583471656355) internal successors, (107369), 19897 states have internal predecessors, (107369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19898 states to 19898 states and 107369 transitions. [2021-10-07 15:58:02,570 INFO L78 Accepts]: Start accepts. Automaton has 19898 states and 107369 transitions. Word has length 22 [2021-10-07 15:58:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:02,570 INFO L470 AbstractCegarLoop]: Abstraction has 19898 states and 107369 transitions. [2021-10-07 15:58:02,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 19898 states and 107369 transitions. [2021-10-07 15:58:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:58:02,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:02,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:58:02,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-07 15:58:02,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:02,815 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:58:02,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:02,816 INFO L82 PathProgramCache]: Analyzing trace with hash 37577670, now seen corresponding path program 1 times [2021-10-07 15:58:02,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:02,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188798630] [2021-10-07 15:58:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:58:02,817 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:02,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:02,819 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:02,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-07 15:58:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:58:03,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:58:03,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:03,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:03,619 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:03,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188798630] [2021-10-07 15:58:03,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188798630] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:58:03,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:58:03,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-07 15:58:03,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861289710] [2021-10-07 15:58:03,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:58:03,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:58:03,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:58:03,621 INFO L87 Difference]: Start difference. First operand 19898 states and 107369 transitions. Second operand has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:04,181 INFO L93 Difference]: Finished difference Result 21022 states and 111650 transitions. [2021-10-07 15:58:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:58:04,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 22 [2021-10-07 15:58:04,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:04,357 INFO L225 Difference]: With dead ends: 21022 [2021-10-07 15:58:04,357 INFO L226 Difference]: Without dead ends: 20857 [2021-10-07 15:58:04,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:58:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20857 states. [2021-10-07 15:58:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20857 to 20857. [2021-10-07 15:58:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20857 states, 20840 states have (on average 5.320057581573896) internal successors, (110870), 20856 states have internal predecessors, (110870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20857 states to 20857 states and 110870 transitions. [2021-10-07 15:58:05,480 INFO L78 Accepts]: Start accepts. Automaton has 20857 states and 110870 transitions. Word has length 22 [2021-10-07 15:58:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:05,480 INFO L470 AbstractCegarLoop]: Abstraction has 20857 states and 110870 transitions. [2021-10-07 15:58:05,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 20857 states and 110870 transitions. [2021-10-07 15:58:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:58:05,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:05,499 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1] [2021-10-07 15:58:05,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-07 15:58:05,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:05,712 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:58:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:05,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1881602859, now seen corresponding path program 2 times [2021-10-07 15:58:05,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:05,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233498333] [2021-10-07 15:58:05,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:58:05,715 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:05,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:05,716 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:05,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-07 15:58:06,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:58:06,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:58:06,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 15:58:06,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:06,703 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:58:06,703 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:58:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:07,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:14,888 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:14,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233498333] [2021-10-07 15:58:14,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233498333] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:14,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:14,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2021-10-07 15:58:14,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003467576] [2021-10-07 15:58:14,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-07 15:58:14,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:14,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-07 15:58:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:58:14,890 INFO L87 Difference]: Start difference. First operand 20857 states and 110870 transitions. Second operand has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:19,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:59:19,787 INFO L93 Difference]: Finished difference Result 46202 states and 216809 transitions. [2021-10-07 15:59:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-07 15:59:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2021-10-07 15:59:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:59:20,102 INFO L225 Difference]: With dead ends: 46202 [2021-10-07 15:59:20,102 INFO L226 Difference]: Without dead ends: 46202 [2021-10-07 15:59:20,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 29443.8ms TimeCoverageRelationStatistics Valid=1276, Invalid=5864, Unknown=0, NotChecked=0, Total=7140 [2021-10-07 15:59:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46202 states. [2021-10-07 15:59:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46202 to 24868. [2021-10-07 15:59:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24868 states, 24851 states have (on average 5.329886121282846) internal successors, (132453), 24867 states have internal predecessors, (132453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24868 states to 24868 states and 132453 transitions. [2021-10-07 15:59:21,751 INFO L78 Accepts]: Start accepts. Automaton has 24868 states and 132453 transitions. Word has length 23 [2021-10-07 15:59:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:59:21,751 INFO L470 AbstractCegarLoop]: Abstraction has 24868 states and 132453 transitions. [2021-10-07 15:59:21,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 24868 states and 132453 transitions. [2021-10-07 15:59:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:59:21,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:59:21,770 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:59:21,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-07 15:59:21,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:59:21,976 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 15:59:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:59:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1203723585, now seen corresponding path program 1 times [2021-10-07 15:59:21,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:59:21,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431236606] [2021-10-07 15:59:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:59:21,978 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:59:21,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:59:21,980 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:59:21,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-07 15:59:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:59:22,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-07 15:59:22,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:59:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:59:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:59:22,904 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 15:59:22,905 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 15:59:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:59:24,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:59:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:59:29,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:59:29,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431236606] [2021-10-07 15:59:29,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431236606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:59:29,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:59:29,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:59:29,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824094317] [2021-10-07 15:59:29,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:59:29,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:59:29,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:59:29,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:59:29,101 INFO L87 Difference]: Start difference. First operand 24868 states and 132453 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:00:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:00:03,885 INFO L93 Difference]: Finished difference Result 29574 states and 150382 transitions. [2021-10-07 16:00:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-07 16:00:03,890 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2021-10-07 16:00:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:00:04,092 INFO L225 Difference]: With dead ends: 29574 [2021-10-07 16:00:04,093 INFO L226 Difference]: Without dead ends: 29574 [2021-10-07 16:00:04,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 17459.3ms TimeCoverageRelationStatistics Valid=676, Invalid=2864, Unknown=0, NotChecked=0, Total=3540 [2021-10-07 16:00:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29574 states. [2021-10-07 16:00:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29574 to 24852. [2021-10-07 16:00:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24852 states, 24835 states have (on average 5.310891886450574) internal successors, (131896), 24851 states have internal predecessors, (131896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:00:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24852 states to 24852 states and 131896 transitions. [2021-10-07 16:00:05,275 INFO L78 Accepts]: Start accepts. Automaton has 24852 states and 131896 transitions. Word has length 23 [2021-10-07 16:00:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:00:05,276 INFO L470 AbstractCegarLoop]: Abstraction has 24852 states and 131896 transitions. [2021-10-07 16:00:05,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:00:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 24852 states and 131896 transitions. [2021-10-07 16:00:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:00:05,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:00:05,294 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:00:05,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-07 16:00:05,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:00:05,495 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 16:00:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:00:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash 514918270, now seen corresponding path program 7 times [2021-10-07 16:00:05,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:00:05,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655207554] [2021-10-07 16:00:05,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:00:05,498 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:00:05,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:00:05,499 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:00:05,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-07 16:00:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:00:06,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 16:00:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:00:06,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:00:06,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:00:06,490 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 16:00:06,491 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 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 16:00:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:00:07,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:00:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:00:16,409 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:00:16,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655207554] [2021-10-07 16:00:16,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655207554] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:00:16,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:00:16,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2021-10-07 16:00:16,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916995228] [2021-10-07 16:00:16,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 16:00:16,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:00:16,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 16:00:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:00:16,411 INFO L87 Difference]: Start difference. First operand 24852 states and 131896 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:01:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:01:36,894 INFO L93 Difference]: Finished difference Result 29332 states and 143342 transitions. [2021-10-07 16:01:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-07 16:01:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 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 24 [2021-10-07 16:01:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:01:37,246 INFO L225 Difference]: With dead ends: 29332 [2021-10-07 16:01:37,246 INFO L226 Difference]: Without dead ends: 29332 [2021-10-07 16:01:37,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 43570.2ms TimeCoverageRelationStatistics Valid=1105, Invalid=6205, Unknown=0, NotChecked=0, Total=7310 [2021-10-07 16:01:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29332 states. [2021-10-07 16:01:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29332 to 22314. [2021-10-07 16:01:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22314 states, 22297 states have (on average 5.261515002018209) internal successors, (117316), 22313 states have internal predecessors, (117316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:01:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22314 states to 22314 states and 117316 transitions. [2021-10-07 16:01:38,063 INFO L78 Accepts]: Start accepts. Automaton has 22314 states and 117316 transitions. Word has length 24 [2021-10-07 16:01:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:01:38,063 INFO L470 AbstractCegarLoop]: Abstraction has 22314 states and 117316 transitions. [2021-10-07 16:01:38,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:01:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 22314 states and 117316 transitions. [2021-10-07 16:01:38,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 16:01:38,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:01:38,367 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2021-10-07 16:01:38,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-07 16:01:38,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:01:38,582 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 16:01:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:01:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash -479689653, now seen corresponding path program 3 times [2021-10-07 16:01:38,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:01:38,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514797535] [2021-10-07 16:01:38,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:01:38,584 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:01:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:01:38,586 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:01:38,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-07 16:01:39,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-07 16:01:39,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:01:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-07 16:01:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:01:39,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:01:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:01:40,125 INFO L354 Elim1Store]: treesize reduction 357, result has 18.7 percent of original size [2021-10-07 16:01:40,125 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 6 case distinctions, treesize of input 28 treesize of output 91 [2021-10-07 16:01:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-07 16:01:41,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:01:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-07 16:01:44,782 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:01:44,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514797535] [2021-10-07 16:01:44,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514797535] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:01:44,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:01:44,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:01:44,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593390343] [2021-10-07 16:01:44,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:01:44,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:01:44,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:01:44,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:01:44,784 INFO L87 Difference]: Start difference. First operand 22314 states and 117316 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:01:56,094 WARN L207 SmtUtils]: Spent 8.28 s on a formula simplification. DAG size of input: 126 DAG size of output: 125 [2021-10-07 16:02:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:02:42,931 INFO L93 Difference]: Finished difference Result 52048 states and 246072 transitions. [2021-10-07 16:02:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:02:42,933 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-07 16:02:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:02:43,279 INFO L225 Difference]: With dead ends: 52048 [2021-10-07 16:02:43,280 INFO L226 Difference]: Without dead ends: 52048 [2021-10-07 16:02:43,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 24550.9ms TimeCoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 16:02:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52048 states. [2021-10-07 16:02:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52048 to 27678. [2021-10-07 16:02:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27678 states, 27661 states have (on average 5.335707313546148) internal successors, (147591), 27677 states have internal predecessors, (147591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:02:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27678 states to 27678 states and 147591 transitions. [2021-10-07 16:02:44,960 INFO L78 Accepts]: Start accepts. Automaton has 27678 states and 147591 transitions. Word has length 25 [2021-10-07 16:02:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:02:44,961 INFO L470 AbstractCegarLoop]: Abstraction has 27678 states and 147591 transitions. [2021-10-07 16:02:44,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:02:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27678 states and 147591 transitions. [2021-10-07 16:02:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 16:02:44,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:02:44,979 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:02:44,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-10-07 16:02:45,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:02:45,180 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 36 more)] === [2021-10-07 16:02:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:02:45,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1638366123, now seen corresponding path program 8 times [2021-10-07 16:02:45,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:02:45,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509733258] [2021-10-07 16:02:45,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:02:45,183 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:02:45,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:02:45,184 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:02:45,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-07 16:02:45,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:02:45,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:02:45,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-07 16:02:45,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:02:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:02:45,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:02:46,350 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-07 16:02:46,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-07 16:02:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:02:48,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2021-10-07 16:02:54,323 WARN L223 SmtUtils]: Removed 6 from assertion stack [2021-10-07 16:02:54,325 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:02:54,335 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 [2021-10-07 16:02:54,337 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:02:54,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-07 16:02:54,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:02:54,527 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. [2021-10-07 16:02:54,530 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:02:54,530 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:02:54,531 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:02:54,531 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:02:54,531 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:02:54,532 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:02:54,532 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:02:54,532 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:02:54,532 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:02:54,532 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:02:54,532 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:02:54,532 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:02:54,532 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:02:54,533 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:02:54,533 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:02:54,533 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:02:54,533 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:02:54,533 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:02:54,533 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:02:54,533 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:02:54,534 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-07 16:02:54,534 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-07 16:02:54,534 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-07 16:02:54,534 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-07 16:02:54,534 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:02:54,534 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:02:54,534 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:02:54,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:02:54,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:02:54,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-07 16:02:54,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0REQUIRES_VIOLATION [2021-10-07 16:02:54,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err1REQUIRES_VIOLATION [2021-10-07 16:02:54,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:02:54,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:02:54,536 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:02:54,536 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:02:54,536 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:02:54,536 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0REQUIRES_VIOLATION [2021-10-07 16:02:54,536 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err1REQUIRES_VIOLATION [2021-10-07 16:02:54,544 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:02:54,545 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:02:54,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:02:54 BasicIcfg [2021-10-07 16:02:54,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:02:54,548 INFO L168 Benchmark]: Toolchain (without parser) took 825361.58 ms. Allocated memory was 157.3 MB in the beginning and 4.5 GB in the end (delta: 4.4 GB). Free memory was 132.8 MB in the beginning and 2.4 GB in the end (delta: -2.2 GB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-10-07 16:02:54,548 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 157.3 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:02:54,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 477.66 ms. Allocated memory is still 157.3 MB. Free memory was 132.4 MB in the beginning and 118.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:02:54,549 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.06 ms. Allocated memory is still 157.3 MB. Free memory was 118.1 MB in the beginning and 116.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:02:54,550 INFO L168 Benchmark]: Boogie Preprocessor took 46.46 ms. Allocated memory is still 157.3 MB. Free memory was 116.0 MB in the beginning and 114.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:02:54,552 INFO L168 Benchmark]: RCFGBuilder took 1511.88 ms. Allocated memory is still 157.3 MB. Free memory was 114.1 MB in the beginning and 116.7 MB in the end (delta: -2.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:02:54,553 INFO L168 Benchmark]: TraceAbstraction took 823241.16 ms. Allocated memory was 157.3 MB in the beginning and 4.5 GB in the end (delta: 4.4 GB). Free memory was 116.2 MB in the beginning and 2.4 GB in the end (delta: -2.2 GB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-10-07 16:02:54,559 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 157.3 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 477.66 ms. Allocated memory is still 157.3 MB. Free memory was 132.4 MB in the beginning and 118.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 65.06 ms. Allocated memory is still 157.3 MB. Free memory was 118.1 MB in the beginning and 116.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.46 ms. Allocated memory is still 157.3 MB. Free memory was 116.0 MB in the beginning and 114.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1511.88 ms. Allocated memory is still 157.3 MB. Free memory was 114.1 MB in the beginning and 116.7 MB in the end (delta: -2.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 823241.16 ms. Allocated memory was 157.3 MB in the beginning and 4.5 GB in the end (delta: 4.4 GB). Free memory was 116.2 MB in the beginning and 2.4 GB in the end (delta: -2.2 GB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 31373.5ms, 203 PlacesBefore, 67 PlacesAfterwards, 204 TransitionsBefore, 59 TransitionsAfterwards, 3608 CoEnabledTransitionPairs, 7 FixpointIterations, 109 TrivialSequentialCompositions, 73 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 12 ConcurrentYvCompositions, 9 ChoiceCompositions, 212 TotalNumberOfCompositions, 5030 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4659, positive: 4615, positive conditional: 0, positive unconditional: 4615, negative: 44, negative conditional: 0, negative unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2297, positive: 2285, positive conditional: 0, positive unconditional: 2285, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2297, positive: 2280, positive conditional: 0, positive unconditional: 2280, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 17, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 914, positive: 33, positive conditional: 0, positive unconditional: 33, negative: 881, negative conditional: 0, negative unconditional: 881, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4659, positive: 2330, positive conditional: 0, positive unconditional: 2330, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 2297, unknown conditional: 0, unknown unconditional: 2297] , Statistics on independence cache: Total cache size (in pairs): 178, Positive cache size: 175, Positive conditional cache size: 0, Positive unconditional cache size: 175, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 137]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 137]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 116]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 116]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 122]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 122]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 123]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 123]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 126]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 118]: 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 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 117]: 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 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 116]: 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 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 119]: 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 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 27ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 235 locations, 40 error locations. Started 1 CEGAR loops. OverallTime: 823049.7ms, OverallIterations: 37, TraceHistogramMax: 14, EmptinessCheckTime: 497.1ms, AutomataDifference: 625034.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31555.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3291 SDtfs, 64216 SDslu, 40713 SDs, 0 SdLazy, 52454 SolverSat, 4165 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 361604.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1126 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 830 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5525 ImplicationChecksByTransitivity, 300066.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27678occurred in iteration=36, InterpolantAutomatonStates: 587, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13515.2ms AutomataMinimizationTime, 36 MinimizatonAttempts, 220556 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 408.5ms SsaConstructionTime, 4662.9ms SatisfiabilityAnalysisTime, 124527.8ms InterpolantComputationTime, 411 NumberOfCodeBlocks, 408 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 750 ConstructedInterpolants, 138 QuantifiedInterpolants, 19699 SizeOfPredicates, 596 NumberOfNonLiveVariables, 4018 ConjunctsInSsa, 670 ConjunctsInUnsatCore, 72 InterpolantComputations, 29 PerfectInterpolantSequences, 299/1560 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