/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:11:19,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:11:19,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:11:19,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 16:11:19,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:11:19,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:11:19,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:11:19,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:11:19,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:11:19,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:11:19,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:11:19,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:11:19,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:11:19,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:11:19,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:11:19,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:11:19,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:11:19,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:11:19,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:11:19,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:11:19,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:11:19,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:11:19,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:11:19,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:11:19,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:11:19,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:11:19,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:11:19,271 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:11:19,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:11:19,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:11:19,272 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:11:19,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:11:19,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:11:19,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:11:19,274 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:11:19,274 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:11:19,274 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:11:19,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:11:19,275 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:11:19,275 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:11:19,275 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:11:19,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:11:19,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:11:19,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:11:19,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:11:19,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:11:19,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:11:19,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:11:19,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:11:19,277 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:11:19,277 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:11:19,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:11:19,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:11:19,278 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:11:19,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:11:19,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:11:19,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:11:19,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:11:19,744 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:11:19,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-10-07 16:11:19,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01efa9abb/ab08927613fa46fe992c211db7b5d651/FLAG15dd0ba49 [2021-10-07 16:11:20,518 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:11:20,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-10-07 16:11:20,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01efa9abb/ab08927613fa46fe992c211db7b5d651/FLAG15dd0ba49 [2021-10-07 16:11:20,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01efa9abb/ab08927613fa46fe992c211db7b5d651 [2021-10-07 16:11:20,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:11:20,904 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:11:20,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:11:20,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:11:20,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:11:20,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:11:20" (1/1) ... [2021-10-07 16:11:20,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e835a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:20, skipping insertion in model container [2021-10-07 16:11:20,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:11:20" (1/1) ... [2021-10-07 16:11:20,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:11:20,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:11:21,129 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2293,2306] [2021-10-07 16:11:21,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:11:21,156 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:11:21,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:11:21,180 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2293,2306] [2021-10-07 16:11:21,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:11:21,197 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:11:21,256 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2293,2306] [2021-10-07 16:11:21,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:11:21,302 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:11:21,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21 WrapperNode [2021-10-07 16:11:21,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:11:21,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:11:21,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:11:21,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:11:21,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:11:21,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:11:21,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:11:21,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:11:21,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:11:21,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:11:21,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:11:21,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:11:21,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (1/1) ... [2021-10-07 16:11:21,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:11:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:11:21,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 16:11:21,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 16:11:21,631 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:11:21,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:11:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:11:21,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:11:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:11:21,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:11:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:11:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:11:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:11:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:11:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:11:21,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:11:21,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:11:21,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:11:21,639 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:11:22,400 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:11:22,400 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-07 16:11:22,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:11:22 BoogieIcfgContainer [2021-10-07 16:11:22,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:11:22,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:11:22,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:11:22,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:11:22,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:11:20" (1/3) ... [2021-10-07 16:11:22,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc8d6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:11:22, skipping insertion in model container [2021-10-07 16:11:22,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:11:21" (2/3) ... [2021-10-07 16:11:22,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc8d6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:11:22, skipping insertion in model container [2021-10-07 16:11:22,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:11:22" (3/3) ... [2021-10-07 16:11:22,412 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2021-10-07 16:11:22,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:11:22,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-10-07 16:11:22,419 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:11:22,459 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,459 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,460 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,460 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,460 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,460 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,461 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,461 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,461 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,461 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,462 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,462 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,462 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,462 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,463 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,463 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,463 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,464 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,464 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,464 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,464 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,464 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,465 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,465 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,465 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,465 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,465 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,465 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,466 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,466 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,466 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,467 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,467 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,467 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,468 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,468 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,468 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,468 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,469 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,469 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,469 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,469 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,470 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,470 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,470 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,471 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,472 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,472 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,472 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,472 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,473 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,473 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,473 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,473 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,473 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,474 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,474 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,474 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,474 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,474 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,475 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,475 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,475 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,476 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,476 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,476 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,476 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,477 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,477 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,477 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,477 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,477 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,478 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,478 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,478 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,479 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,479 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,479 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,479 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,480 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,480 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,480 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,480 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,480 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,481 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,481 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,481 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,481 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,481 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,482 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,485 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,486 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,486 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,486 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,487 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,493 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,493 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,493 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,493 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,494 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,496 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,496 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,496 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,496 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,497 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:11:22,506 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:11:22,562 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:11:22,570 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 16:11:22,570 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-10-07 16:11:22,591 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:11:22,605 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 166 transitions, 356 flow [2021-10-07 16:11:22,608 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 166 transitions, 356 flow [2021-10-07 16:11:22,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 166 transitions, 356 flow [2021-10-07 16:11:22,686 INFO L129 PetriNetUnfolder]: 12/163 cut-off events. [2021-10-07 16:11:22,687 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:11:22,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 163 events. 12/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 204 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2021-10-07 16:11:22,698 INFO L116 LiptonReduction]: Number of co-enabled transitions 2688 [2021-10-07 16:11:42,105 INFO L131 LiptonReduction]: Checked pairs total: 3069 [2021-10-07 16:11:42,106 INFO L133 LiptonReduction]: Total number of compositions: 161 [2021-10-07 16:11:42,122 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2021-10-07 16:11:42,194 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states 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 16:11:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states 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 16:11:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:11:42,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:42,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:11:42,207 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:42,213 INFO L82 PathProgramCache]: Analyzing trace with hash 19859, now seen corresponding path program 1 times [2021-10-07 16:11:42,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:42,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809856830] [2021-10-07 16:11:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:42,230 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:42,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:42,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:11:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:42,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 16:11:42,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:42,857 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-07 16:11:42,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 103 [2021-10-07 16:11:42,903 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 16:11:42,904 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 106 treesize of output 102 [2021-10-07 16:11:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:44,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:44,805 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:44,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809856830] [2021-10-07 16:11:44,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809856830] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:44,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:44,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:11:44,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207184733] [2021-10-07 16:11:44,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:11:44,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:11:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:44,836 INFO L87 Difference]: Start difference. First operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:45,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:45,144 INFO L93 Difference]: Finished difference Result 623 states and 2064 transitions. [2021-10-07 16:11:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:11:45,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:11:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:45,176 INFO L225 Difference]: With dead ends: 623 [2021-10-07 16:11:45,176 INFO L226 Difference]: Without dead ends: 623 [2021-10-07 16:11:45,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-10-07 16:11:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2021-10-07 16:11:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 518 states have (on average 3.9845559845559846) internal successors, (2064), 622 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states 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 16:11:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2064 transitions. [2021-10-07 16:11:45,289 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2064 transitions. Word has length 2 [2021-10-07 16:11:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:45,291 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 2064 transitions. [2021-10-07 16:11:45,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2064 transitions. [2021-10-07 16:11:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:11:45,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:45,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:11:45,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 16:11:45,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:45,506 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash 19860, now seen corresponding path program 1 times [2021-10-07 16:11:45,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:45,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439735569] [2021-10-07 16:11:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:45,509 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:45,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:45,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:45,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:11:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:11:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:45,662 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-07 16:11:45,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 56 [2021-10-07 16:11:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:45,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:45,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:45,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439735569] [2021-10-07 16:11:45,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439735569] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:45,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:45,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:11:45,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739217511] [2021-10-07 16:11:45,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:11:45,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:11:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:45,767 INFO L87 Difference]: Start difference. First operand 623 states and 2064 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:45,903 INFO L93 Difference]: Finished difference Result 497 states and 1563 transitions. [2021-10-07 16:11:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:11:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:11:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:45,910 INFO L225 Difference]: With dead ends: 497 [2021-10-07 16:11:45,911 INFO L226 Difference]: Without dead ends: 497 [2021-10-07 16:11:45,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-10-07 16:11:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2021-10-07 16:11:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 420 states have (on average 3.7214285714285715) internal successors, (1563), 496 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states 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 16:11:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1563 transitions. [2021-10-07 16:11:45,946 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1563 transitions. Word has length 2 [2021-10-07 16:11:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:45,947 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1563 transitions. [2021-10-07 16:11:45,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1563 transitions. [2021-10-07 16:11:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:11:45,948 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:45,948 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:11:45,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:11:46,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:46,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:46,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:46,163 INFO L82 PathProgramCache]: Analyzing trace with hash 19742, now seen corresponding path program 1 times [2021-10-07 16:11:46,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:46,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108155214] [2021-10-07 16:11:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:46,166 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:46,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:46,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:46,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:11:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:46,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:11:46,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:11:46,608 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:11:46,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:11:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:46,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:46,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:46,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108155214] [2021-10-07 16:11:46,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108155214] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:46,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:46,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:11:46,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050703800] [2021-10-07 16:11:46,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:11:46,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:46,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:11:46,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:46,822 INFO L87 Difference]: Start difference. First operand 497 states and 1563 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:47,306 INFO L93 Difference]: Finished difference Result 994 states and 3127 transitions. [2021-10-07 16:11:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:11:47,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:11:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:47,318 INFO L225 Difference]: With dead ends: 994 [2021-10-07 16:11:47,319 INFO L226 Difference]: Without dead ends: 994 [2021-10-07 16:11:47,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-10-07 16:11:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 499. [2021-10-07 16:11:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 422 states have (on average 3.7180094786729856) internal successors, (1569), 498 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states 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 16:11:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1569 transitions. [2021-10-07 16:11:47,401 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1569 transitions. Word has length 2 [2021-10-07 16:11:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:47,402 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1569 transitions. [2021-10-07 16:11:47,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1569 transitions. [2021-10-07 16:11:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:11:47,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:47,403 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:11:47,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-07 16:11:47,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:47,611 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash 19743, now seen corresponding path program 1 times [2021-10-07 16:11:47,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:47,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918150284] [2021-10-07 16:11:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:47,615 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:47,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:47,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:47,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:11:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:11:47,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:47,738 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:11:47,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 16:11:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:47,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:47,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:47,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918150284] [2021-10-07 16:11:47,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918150284] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:47,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:47,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:11:47,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805839864] [2021-10-07 16:11:47,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:11:47,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:11:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:11:47,780 INFO L87 Difference]: Start difference. First operand 499 states and 1569 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:47,884 INFO L93 Difference]: Finished difference Result 498 states and 1566 transitions. [2021-10-07 16:11:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:11:47,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:11:47,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:47,890 INFO L225 Difference]: With dead ends: 498 [2021-10-07 16:11:47,890 INFO L226 Difference]: Without dead ends: 498 [2021-10-07 16:11:47,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:11:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-10-07 16:11:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2021-10-07 16:11:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 422 states have (on average 3.7109004739336493) internal successors, (1566), 497 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states 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 16:11:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1566 transitions. [2021-10-07 16:11:47,914 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1566 transitions. Word has length 2 [2021-10-07 16:11:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:47,914 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1566 transitions. [2021-10-07 16:11:47,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1566 transitions. [2021-10-07 16:11:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:11:47,915 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:47,915 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:11:47,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 16:11:48,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:48,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:48,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash 19100191, now seen corresponding path program 1 times [2021-10-07 16:11:48,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:48,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845276153] [2021-10-07 16:11:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:48,131 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:48,132 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:48,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:11:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:11:48,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:48,532 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-07 16:11:48,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 91 [2021-10-07 16:11:48,542 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 93 treesize of output 91 [2021-10-07 16:11:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:51,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:51,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:51,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845276153] [2021-10-07 16:11:51,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845276153] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:51,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:51,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:11:51,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968435865] [2021-10-07 16:11:51,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:11:51,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:51,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:11:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:51,650 INFO L87 Difference]: Start difference. First operand 498 states and 1566 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:51,960 INFO L93 Difference]: Finished difference Result 468 states and 1481 transitions. [2021-10-07 16:11:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:11:51,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 16:11:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:51,967 INFO L225 Difference]: With dead ends: 468 [2021-10-07 16:11:51,967 INFO L226 Difference]: Without dead ends: 468 [2021-10-07 16:11:51,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-10-07 16:11:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2021-10-07 16:11:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 404 states have (on average 3.6658415841584158) internal successors, (1481), 467 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1481 transitions. [2021-10-07 16:11:51,988 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1481 transitions. Word has length 4 [2021-10-07 16:11:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:51,989 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1481 transitions. [2021-10-07 16:11:51,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1481 transitions. [2021-10-07 16:11:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:11:51,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:51,990 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:11:52,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 16:11:52,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:52,203 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:52,204 INFO L82 PathProgramCache]: Analyzing trace with hash 19100192, now seen corresponding path program 1 times [2021-10-07 16:11:52,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:52,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175028346] [2021-10-07 16:11:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:52,205 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:52,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:52,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:52,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:11:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:52,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:11:52,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:52,347 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:11:52,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 45 [2021-10-07 16:11:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:52,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:52,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:52,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175028346] [2021-10-07 16:11:52,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175028346] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:52,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:52,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:11:52,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103019739] [2021-10-07 16:11:52,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:11:52,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:52,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:11:52,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:52,535 INFO L87 Difference]: Start difference. First operand 468 states and 1481 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:52,641 INFO L93 Difference]: Finished difference Result 438 states and 1396 transitions. [2021-10-07 16:11:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:11:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 16:11:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:52,646 INFO L225 Difference]: With dead ends: 438 [2021-10-07 16:11:52,646 INFO L226 Difference]: Without dead ends: 438 [2021-10-07 16:11:52,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-10-07 16:11:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2021-10-07 16:11:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 386 states have (on average 3.616580310880829) internal successors, (1396), 437 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 16:11:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1396 transitions. [2021-10-07 16:11:52,681 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1396 transitions. Word has length 4 [2021-10-07 16:11:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:52,681 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1396 transitions. [2021-10-07 16:11:52,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1396 transitions. [2021-10-07 16:11:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:11:52,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:52,683 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:11:52,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:11:52,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:52,896 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 19079038, now seen corresponding path program 1 times [2021-10-07 16:11:52,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:52,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296259619] [2021-10-07 16:11:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:52,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:52,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:52,900 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:52,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:11:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:52,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:11:52,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:11:53,260 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:11:53,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:11:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:53,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:53,923 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:53,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296259619] [2021-10-07 16:11:53,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296259619] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:11:53,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:11:53,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:11:53,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647693484] [2021-10-07 16:11:53,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:11:53,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:11:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:11:53,925 INFO L87 Difference]: Start difference. First operand 438 states and 1396 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:55,582 INFO L93 Difference]: Finished difference Result 2607 states and 8344 transitions. [2021-10-07 16:11:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:11:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 16:11:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:55,611 INFO L225 Difference]: With dead ends: 2607 [2021-10-07 16:11:55,611 INFO L226 Difference]: Without dead ends: 2607 [2021-10-07 16:11:55,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 818.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:11:55,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-10-07 16:11:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 442. [2021-10-07 16:11:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 390 states have (on average 3.6) internal successors, (1404), 441 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 16:11:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1404 transitions. [2021-10-07 16:11:55,662 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1404 transitions. Word has length 4 [2021-10-07 16:11:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:55,662 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1404 transitions. [2021-10-07 16:11:55,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1404 transitions. [2021-10-07 16:11:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:11:55,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:55,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:11:55,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 16:11:55,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:55,879 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:55,880 INFO L82 PathProgramCache]: Analyzing trace with hash 592100705, now seen corresponding path program 1 times [2021-10-07 16:11:55,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:55,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145535386] [2021-10-07 16:11:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:55,881 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:55,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:55,882 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:55,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:11:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:55,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 16:11:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:55,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:11:56,206 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:11:56,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:11:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:56,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:56,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:56,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145535386] [2021-10-07 16:11:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145535386] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:56,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:56,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:11:56,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542678108] [2021-10-07 16:11:56,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:11:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:56,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:11:56,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:11:56,681 INFO L87 Difference]: Start difference. First operand 442 states and 1404 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:57,313 INFO L93 Difference]: Finished difference Result 874 states and 2863 transitions. [2021-10-07 16:11:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:11:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:11:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:57,323 INFO L225 Difference]: With dead ends: 874 [2021-10-07 16:11:57,323 INFO L226 Difference]: Without dead ends: 874 [2021-10-07 16:11:57,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:11:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-10-07 16:11:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 586. [2021-10-07 16:11:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 534 states have (on average 4.063670411985019) internal successors, (2170), 585 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states 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 16:11:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 2170 transitions. [2021-10-07 16:11:57,352 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 2170 transitions. Word has length 5 [2021-10-07 16:11:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:57,353 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 2170 transitions. [2021-10-07 16:11:57,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 2170 transitions. [2021-10-07 16:11:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:11:57,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:57,354 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:11:57,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 16:11:57,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:57,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:57,570 INFO L82 PathProgramCache]: Analyzing trace with hash 592100707, now seen corresponding path program 1 times [2021-10-07 16:11:57,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:57,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115813196] [2021-10-07 16:11:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:57,572 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:57,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:57,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:57,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:11:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:57,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:11:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:57,695 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:11:57,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 16:11:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:57,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:57,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:57,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115813196] [2021-10-07 16:11:57,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115813196] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:57,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:57,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:11:57,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519689992] [2021-10-07 16:11:57,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:11:57,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:11:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:57,751 INFO L87 Difference]: Start difference. First operand 586 states and 2170 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:57,876 INFO L93 Difference]: Finished difference Result 360 states and 1231 transitions. [2021-10-07 16:11:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:11:57,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:11:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:57,880 INFO L225 Difference]: With dead ends: 360 [2021-10-07 16:11:57,880 INFO L226 Difference]: Without dead ends: 360 [2021-10-07 16:11:57,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:11:57,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-07 16:11:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-10-07 16:11:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 339 states have (on average 3.631268436578171) internal successors, (1231), 359 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states 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 16:11:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1231 transitions. [2021-10-07 16:11:57,901 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1231 transitions. Word has length 5 [2021-10-07 16:11:57,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:57,901 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1231 transitions. [2021-10-07 16:11:57,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:57,902 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1231 transitions. [2021-10-07 16:11:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:11:57,902 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:57,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:11:57,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:11:58,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:58,115 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1175429990, now seen corresponding path program 1 times [2021-10-07 16:11:58,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:58,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910704984] [2021-10-07 16:11:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:58,118 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:58,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:58,120 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:58,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 16:11:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:11:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:58,261 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:11:58,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 16:11:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:58,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:58,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:58,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910704984] [2021-10-07 16:11:58,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910704984] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:58,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:58,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:11:58,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036359888] [2021-10-07 16:11:58,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:11:58,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:58,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:11:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:11:58,329 INFO L87 Difference]: Start difference. First operand 360 states and 1231 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:58,415 INFO L93 Difference]: Finished difference Result 332 states and 1143 transitions. [2021-10-07 16:11:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:11:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:11:58,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:58,420 INFO L225 Difference]: With dead ends: 332 [2021-10-07 16:11:58,420 INFO L226 Difference]: Without dead ends: 332 [2021-10-07 16:11:58,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:11:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-10-07 16:11:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-10-07 16:11:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 317 states have (on average 3.6056782334384856) internal successors, (1143), 331 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states 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 16:11:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1143 transitions. [2021-10-07 16:11:58,433 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1143 transitions. Word has length 6 [2021-10-07 16:11:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:58,434 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1143 transitions. [2021-10-07 16:11:58,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:11:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1143 transitions. [2021-10-07 16:11:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:11:58,435 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:58,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:11:58,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-07 16:11:58,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:58,639 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:11:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:11:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1175429992, now seen corresponding path program 1 times [2021-10-07 16:11:58,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:11:58,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885627941] [2021-10-07 16:11:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:11:58,641 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:11:58,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:11:58,642 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:11:58,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 16:11:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:11:58,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:11:58,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:11:59,002 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-07 16:11:59,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 80 [2021-10-07 16:11:59,009 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 83 treesize of output 81 [2021-10-07 16:11:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:59,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:11:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:11:59,773 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:11:59,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885627941] [2021-10-07 16:11:59,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885627941] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:11:59,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:11:59,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:11:59,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429502156] [2021-10-07 16:11:59,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:11:59,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:11:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:11:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:59,776 INFO L87 Difference]: Start difference. First operand 332 states and 1143 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 16:11:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:11:59,879 INFO L93 Difference]: Finished difference Result 304 states and 1055 transitions. [2021-10-07 16:11:59,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:11:59,880 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 16:11:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:11:59,884 INFO L225 Difference]: With dead ends: 304 [2021-10-07 16:11:59,884 INFO L226 Difference]: Without dead ends: 304 [2021-10-07 16:11:59,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:11:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-07 16:11:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-10-07 16:11:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 295 states have (on average 3.5762711864406778) internal successors, (1055), 303 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states 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 16:11:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1055 transitions. [2021-10-07 16:11:59,895 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1055 transitions. Word has length 6 [2021-10-07 16:11:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:11:59,895 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1055 transitions. [2021-10-07 16:11:59,896 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 16:11:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1055 transitions. [2021-10-07 16:11:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:11:59,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:11:59,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:11:59,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:00,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:00,109 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:00,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2078586739, now seen corresponding path program 1 times [2021-10-07 16:12:00,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:00,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157921536] [2021-10-07 16:12:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:12:00,112 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:00,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:00,113 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:00,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 16:12:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:12:00,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:12:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:00,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:12:00,502 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:12:00,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:12:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:00,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:01,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:01,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157921536] [2021-10-07 16:12:01,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157921536] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:12:01,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:12:01,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:12:01,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68331457] [2021-10-07 16:12:01,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:12:01,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:01,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:12:01,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:12:01,102 INFO L87 Difference]: Start difference. First operand 304 states and 1055 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:12:01,608 INFO L93 Difference]: Finished difference Result 518 states and 1885 transitions. [2021-10-07 16:12:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:12:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:12:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:12:01,613 INFO L225 Difference]: With dead ends: 518 [2021-10-07 16:12:01,614 INFO L226 Difference]: Without dead ends: 518 [2021-10-07 16:12:01,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:12:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-10-07 16:12:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 440. [2021-10-07 16:12:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 431 states have (on average 3.91415313225058) internal successors, (1687), 439 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states 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 16:12:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1687 transitions. [2021-10-07 16:12:01,630 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1687 transitions. Word has length 7 [2021-10-07 16:12:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:12:01,631 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1687 transitions. [2021-10-07 16:12:01,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1687 transitions. [2021-10-07 16:12:01,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:12:01,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:12:01,632 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-07 16:12:01,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:01,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:01,844 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:01,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2073213217, now seen corresponding path program 1 times [2021-10-07 16:12:01,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:01,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132861282] [2021-10-07 16:12:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:12:01,847 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:01,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:01,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 16:12:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:12:01,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:12:01,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:01,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:12:02,209 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:12:02,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:12:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:02,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:03,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:03,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132861282] [2021-10-07 16:12:03,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132861282] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:12:03,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:12:03,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:12:03,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242341276] [2021-10-07 16:12:03,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:12:03,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:12:03,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:12:03,221 INFO L87 Difference]: Start difference. First operand 440 states and 1687 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:12:06,135 INFO L93 Difference]: Finished difference Result 1424 states and 4993 transitions. [2021-10-07 16:12:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 16:12:06,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:12:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:12:06,147 INFO L225 Difference]: With dead ends: 1424 [2021-10-07 16:12:06,147 INFO L226 Difference]: Without dead ends: 1424 [2021-10-07 16:12:06,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1499.4ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:12:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-10-07 16:12:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 682. [2021-10-07 16:12:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 673 states have (on average 3.725111441307578) internal successors, (2507), 681 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states 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 16:12:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2507 transitions. [2021-10-07 16:12:06,181 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2507 transitions. Word has length 7 [2021-10-07 16:12:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:12:06,182 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2507 transitions. [2021-10-07 16:12:06,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2507 transitions. [2021-10-07 16:12:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:12:06,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:12:06,183 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 16:12:06,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:06,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:06,396 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:06,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:06,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2039315518, now seen corresponding path program 2 times [2021-10-07 16:12:06,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:06,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071530298] [2021-10-07 16:12:06,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:12:06,399 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:06,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:06,400 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:06,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 16:12:06,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:12:06,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:12:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 16:12:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:06,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:12:06,815 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:12:06,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:12:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:07,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:08,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:08,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071530298] [2021-10-07 16:12:08,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071530298] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:12:08,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:12:08,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:12:08,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899198897] [2021-10-07 16:12:08,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:12:08,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:12:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:12:08,844 INFO L87 Difference]: Start difference. First operand 682 states and 2507 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 16:12:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:12:17,142 INFO L93 Difference]: Finished difference Result 5813 states and 22358 transitions. [2021-10-07 16:12:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:12:17,144 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 16:12:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:12:17,197 INFO L225 Difference]: With dead ends: 5813 [2021-10-07 16:12:17,197 INFO L226 Difference]: Without dead ends: 5813 [2021-10-07 16:12:17,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5956.8ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:12:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5813 states. [2021-10-07 16:12:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5813 to 690. [2021-10-07 16:12:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 681 states have (on average 3.7048458149779737) internal successors, (2523), 689 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states 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 16:12:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2523 transitions. [2021-10-07 16:12:17,291 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2523 transitions. Word has length 8 [2021-10-07 16:12:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:12:17,291 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 2523 transitions. [2021-10-07 16:12:17,292 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 16:12:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2523 transitions. [2021-10-07 16:12:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:12:17,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:12:17,293 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:12:17,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:17,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:17,506 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash 366922061, now seen corresponding path program 1 times [2021-10-07 16:12:17,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:17,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470780213] [2021-10-07 16:12:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:12:17,509 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:17,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:17,510 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:17,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 16:12:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:12:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 16:12:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:17,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:17,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:17,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470780213] [2021-10-07 16:12:17,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470780213] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:12:17,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:12:17,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:12:17,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623166334] [2021-10-07 16:12:17,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:12:17,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:12:17,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:12:17,866 INFO L87 Difference]: Start difference. First operand 690 states and 2523 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:12:18,200 INFO L93 Difference]: Finished difference Result 678 states and 2464 transitions. [2021-10-07 16:12:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:12:18,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 16:12:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:12:18,205 INFO L225 Difference]: With dead ends: 678 [2021-10-07 16:12:18,205 INFO L226 Difference]: Without dead ends: 678 [2021-10-07 16:12:18,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:12:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-10-07 16:12:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 670. [2021-10-07 16:12:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 661 states have (on average 3.7170953101361572) internal successors, (2457), 669 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states 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 16:12:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2457 transitions. [2021-10-07 16:12:18,229 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2457 transitions. Word has length 9 [2021-10-07 16:12:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:12:18,230 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 2457 transitions. [2021-10-07 16:12:18,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2457 transitions. [2021-10-07 16:12:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:12:18,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:12:18,232 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-10-07 16:12:18,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:18,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:18,445 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:18,446 INFO L82 PathProgramCache]: Analyzing trace with hash 895030738, now seen corresponding path program 1 times [2021-10-07 16:12:18,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:18,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585160242] [2021-10-07 16:12:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:12:18,447 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:18,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:18,448 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:18,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 16:12:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:12:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:12:18,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:12:18,923 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:12:18,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:12:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:12:19,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:20,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:20,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585160242] [2021-10-07 16:12:20,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585160242] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:12:20,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:12:20,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2021-10-07 16:12:20,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690462595] [2021-10-07 16:12:20,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:12:20,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:12:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:12:20,843 INFO L87 Difference]: Start difference. First operand 670 states and 2457 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:12:22,757 INFO L93 Difference]: Finished difference Result 1138 states and 3932 transitions. [2021-10-07 16:12:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:12:22,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 16:12:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:12:22,764 INFO L225 Difference]: With dead ends: 1138 [2021-10-07 16:12:22,764 INFO L226 Difference]: Without dead ends: 1138 [2021-10-07 16:12:22,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1886.2ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-10-07 16:12:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-10-07 16:12:22,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 730. [2021-10-07 16:12:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 721 states have (on average 3.719833564493759) internal successors, (2682), 729 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states 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 16:12:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2682 transitions. [2021-10-07 16:12:22,794 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2682 transitions. Word has length 9 [2021-10-07 16:12:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:12:22,794 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2682 transitions. [2021-10-07 16:12:22,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2682 transitions. [2021-10-07 16:12:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:12:22,796 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:12:22,796 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-07 16:12:22,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:23,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:23,010 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:23,010 INFO L82 PathProgramCache]: Analyzing trace with hash -583769407, now seen corresponding path program 2 times [2021-10-07 16:12:23,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:23,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746876314] [2021-10-07 16:12:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:12:23,012 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:23,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:23,013 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:23,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 16:12:23,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:12:23,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:12:23,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:12:23,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:12:23,433 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:12:23,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:12:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:12:23,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:12:24,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:24,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746876314] [2021-10-07 16:12:24,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746876314] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:12:24,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:12:24,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:12:24,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135188501] [2021-10-07 16:12:24,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:12:24,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:12:24,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:12:24,416 INFO L87 Difference]: Start difference. First operand 730 states and 2682 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:12:26,938 INFO L93 Difference]: Finished difference Result 1580 states and 5565 transitions. [2021-10-07 16:12:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 16:12:26,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 16:12:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:12:26,946 INFO L225 Difference]: With dead ends: 1580 [2021-10-07 16:12:26,947 INFO L226 Difference]: Without dead ends: 1580 [2021-10-07 16:12:26,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2012.1ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-10-07 16:12:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-10-07 16:12:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 978. [2021-10-07 16:12:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 969 states have (on average 3.9649122807017543) internal successors, (3842), 977 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states 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 16:12:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3842 transitions. [2021-10-07 16:12:26,989 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3842 transitions. Word has length 9 [2021-10-07 16:12:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:12:26,989 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 3842 transitions. [2021-10-07 16:12:26,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3842 transitions. [2021-10-07 16:12:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:12:26,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:12:26,991 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:12:27,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:27,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:27,205 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1449799936, now seen corresponding path program 1 times [2021-10-07 16:12:27,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:27,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855195313] [2021-10-07 16:12:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:12:27,206 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:27,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:27,208 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:27,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 16:12:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:12:27,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:12:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:27,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:12:27,627 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:12:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:12:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:27,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:28,984 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 16:12:28,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:28,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855195313] [2021-10-07 16:12:28,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855195313] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:12:28,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:12:28,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:12:28,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004180079] [2021-10-07 16:12:28,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 16:12:28,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 16:12:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-07 16:12:28,987 INFO L87 Difference]: Start difference. First operand 978 states and 3842 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:12:30,563 INFO L93 Difference]: Finished difference Result 1160 states and 4188 transitions. [2021-10-07 16:12:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:12:30,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:12:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:12:30,570 INFO L225 Difference]: With dead ends: 1160 [2021-10-07 16:12:30,570 INFO L226 Difference]: Without dead ends: 1160 [2021-10-07 16:12:30,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1285.8ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-07 16:12:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-10-07 16:12:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 968. [2021-10-07 16:12:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 959 states have (on average 3.8686131386861313) internal successors, (3710), 967 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states 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 16:12:30,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 3710 transitions. [2021-10-07 16:12:30,607 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 3710 transitions. Word has length 10 [2021-10-07 16:12:30,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:12:30,608 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 3710 transitions. [2021-10-07 16:12:30,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:30,608 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 3710 transitions. [2021-10-07 16:12:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:12:30,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:12:30,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:12:30,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:30,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:30,823 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:30,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:30,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1445087398, now seen corresponding path program 1 times [2021-10-07 16:12:30,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:30,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890091903] [2021-10-07 16:12:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:12:30,826 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:30,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:30,827 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:30,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 16:12:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:12:30,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:12:30,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:31,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:12:31,272 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:12:31,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:12:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:31,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:32,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:32,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890091903] [2021-10-07 16:12:32,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890091903] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:12:32,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:12:32,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:12:32,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534988364] [2021-10-07 16:12:32,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:12:32,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:12:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:12:32,483 INFO L87 Difference]: Start difference. First operand 968 states and 3710 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:12:37,254 INFO L93 Difference]: Finished difference Result 1783 states and 7181 transitions. [2021-10-07 16:12:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:12:37,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:12:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:12:37,266 INFO L225 Difference]: With dead ends: 1783 [2021-10-07 16:12:37,267 INFO L226 Difference]: Without dead ends: 1783 [2021-10-07 16:12:37,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3029.7ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:12:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-10-07 16:12:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1355. [2021-10-07 16:12:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1346 states have (on average 4.028231797919762) internal successors, (5422), 1354 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states 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 16:12:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 5422 transitions. [2021-10-07 16:12:37,336 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 5422 transitions. Word has length 10 [2021-10-07 16:12:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:12:37,336 INFO L470 AbstractCegarLoop]: Abstraction has 1355 states and 5422 transitions. [2021-10-07 16:12:37,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:12:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 5422 transitions. [2021-10-07 16:12:37,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:12:37,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:12:37,338 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:12:37,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:37,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:37,553 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:37,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1787518317, now seen corresponding path program 2 times [2021-10-07 16:12:37,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:37,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548941799] [2021-10-07 16:12:37,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:12:37,555 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:37,556 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:37,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 16:12:37,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:12:37,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:12:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:12:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:37,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:12:38,105 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:12:38,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:12:38,664 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 16:12:38,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:39,947 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 16:12:39,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:39,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548941799] [2021-10-07 16:12:39,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548941799] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:12:39,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:12:39,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:12:39,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669400337] [2021-10-07 16:12:39,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:12:39,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:12:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:12:39,949 INFO L87 Difference]: Start difference. First operand 1355 states and 5422 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 16:12:49,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:12:49,738 INFO L93 Difference]: Finished difference Result 3615 states and 14083 transitions. [2021-10-07 16:12:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 16:12:49,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 16:12:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:12:49,774 INFO L225 Difference]: With dead ends: 3615 [2021-10-07 16:12:49,774 INFO L226 Difference]: Without dead ends: 3615 [2021-10-07 16:12:49,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 5934.3ms TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:12:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-10-07 16:12:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 2189. [2021-10-07 16:12:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2180 states have (on average 4.218348623853211) internal successors, (9196), 2188 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states 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 16:12:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 9196 transitions. [2021-10-07 16:12:49,887 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 9196 transitions. Word has length 11 [2021-10-07 16:12:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:12:49,887 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 9196 transitions. [2021-10-07 16:12:49,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 16:12:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 9196 transitions. [2021-10-07 16:12:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:12:49,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:12:49,890 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:12:49,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 16:12:50,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:12:50,103 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:12:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:12:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash 567598381, now seen corresponding path program 1 times [2021-10-07 16:12:50,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:12:50,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35489701] [2021-10-07 16:12:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:12:50,105 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:12:50,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:12:50,107 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:12:50,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 16:12:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:12:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:12:50,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:12:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:12:50,599 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:12:50,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:12:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:12:51,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:12:52,884 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 16:12:52,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:12:52,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35489701] [2021-10-07 16:12:52,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35489701] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:12:52,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:12:52,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:12:52,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804281022] [2021-10-07 16:12:52,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:12:52,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:12:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:12:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:12:52,886 INFO L87 Difference]: Start difference. First operand 2189 states and 9196 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 16:13:02,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:13:02,423 INFO L93 Difference]: Finished difference Result 3353 states and 14293 transitions. [2021-10-07 16:13:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:13:02,426 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 16:13:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:13:02,438 INFO L225 Difference]: With dead ends: 3353 [2021-10-07 16:13:02,438 INFO L226 Difference]: Without dead ends: 3353 [2021-10-07 16:13:02,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 6423.2ms TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:13:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-10-07 16:13:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2571. [2021-10-07 16:13:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2562 states have (on average 4.355971896955504) internal successors, (11160), 2570 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states 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 16:13:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 11160 transitions. [2021-10-07 16:13:02,535 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 11160 transitions. Word has length 12 [2021-10-07 16:13:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:13:02,538 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 11160 transitions. [2021-10-07 16:13:02,539 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 16:13:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 11160 transitions. [2021-10-07 16:13:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:13:02,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:13:02,541 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2021-10-07 16:13:02,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 16:13:02,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:13:02,756 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:13:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:13:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1717388735, now seen corresponding path program 3 times [2021-10-07 16:13:02,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:13:02,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612033165] [2021-10-07 16:13:02,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:13:02,758 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:13:02,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:13:02,760 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:13:02,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 16:13:03,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 16:13:03,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:13:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 16:13:03,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:13:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:13:03,412 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:13:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:13:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:13:03,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:13:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:13:06,184 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:13:06,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612033165] [2021-10-07 16:13:06,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612033165] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:13:06,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:13:06,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 20 [2021-10-07 16:13:06,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108202951] [2021-10-07 16:13:06,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 16:13:06,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:13:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 16:13:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-10-07 16:13:06,186 INFO L87 Difference]: Start difference. First operand 2571 states and 11160 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:13:21,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:13:21,290 INFO L93 Difference]: Finished difference Result 4965 states and 19558 transitions. [2021-10-07 16:13:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 16:13:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:13:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:13:21,308 INFO L225 Difference]: With dead ends: 4965 [2021-10-07 16:13:21,308 INFO L226 Difference]: Without dead ends: 4965 [2021-10-07 16:13:21,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 6619.8ms TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 16:13:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2021-10-07 16:13:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 2487. [2021-10-07 16:13:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2478 states have (on average 4.364003228410008) internal successors, (10814), 2486 states have internal predecessors, (10814), 0 states have call successors, (0), 0 states 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 16:13:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 10814 transitions. [2021-10-07 16:13:21,443 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 10814 transitions. Word has length 13 [2021-10-07 16:13:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:13:21,443 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 10814 transitions. [2021-10-07 16:13:21,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:13:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 10814 transitions. [2021-10-07 16:13:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:13:21,446 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:13:21,446 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:13:21,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-07 16:13:21,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:13:21,660 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:13:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:13:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2003305358, now seen corresponding path program 3 times [2021-10-07 16:13:21,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:13:21,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519971681] [2021-10-07 16:13:21,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:13:21,662 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:13:21,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:13:21,663 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:13:21,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 16:13:21,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 16:13:21,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:13:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:13:22,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:13:22,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:13:22,353 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:13:22,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:13:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:13:22,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:13:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:13:23,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:13:23,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519971681] [2021-10-07 16:13:23,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519971681] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:13:23,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:13:23,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:13:23,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746831609] [2021-10-07 16:13:23,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:13:23,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:13:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:13:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:13:23,722 INFO L87 Difference]: Start difference. First operand 2487 states and 10814 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 16:13:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:13:28,640 INFO L93 Difference]: Finished difference Result 6393 states and 26575 transitions. [2021-10-07 16:13:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 16:13:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 13 [2021-10-07 16:13:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:13:28,701 INFO L225 Difference]: With dead ends: 6393 [2021-10-07 16:13:28,701 INFO L226 Difference]: Without dead ends: 6393 [2021-10-07 16:13:28,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3926.4ms TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:13:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2021-10-07 16:13:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 3863. [2021-10-07 16:13:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3854 states have (on average 4.6995329527763365) internal successors, (18112), 3862 states have internal predecessors, (18112), 0 states have call successors, (0), 0 states 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 16:13:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 18112 transitions. [2021-10-07 16:13:28,850 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 18112 transitions. Word has length 13 [2021-10-07 16:13:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:13:28,851 INFO L470 AbstractCegarLoop]: Abstraction has 3863 states and 18112 transitions. [2021-10-07 16:13:28,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 16:13:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 18112 transitions. [2021-10-07 16:13:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:13:28,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:13:28,854 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:13:28,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 16:13:29,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:13:29,068 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:13:29,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:13:29,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1791990643, now seen corresponding path program 2 times [2021-10-07 16:13:29,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:13:29,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412967864] [2021-10-07 16:13:29,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:13:29,070 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:13:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:13:29,071 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:13:29,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 16:13:29,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:13:29,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:13:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:13:29,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:13:29,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:13:29,608 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:13:29,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:13:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:13:29,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:13:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:13:30,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:13:30,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412967864] [2021-10-07 16:13:30,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412967864] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:13:30,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:13:30,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:13:30,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142260516] [2021-10-07 16:13:30,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:13:30,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:13:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:13:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:13:30,927 INFO L87 Difference]: Start difference. First operand 3863 states and 18112 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:13:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:13:31,321 INFO L93 Difference]: Finished difference Result 3549 states and 16386 transitions. [2021-10-07 16:13:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:13:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:13:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:13:31,333 INFO L225 Difference]: With dead ends: 3549 [2021-10-07 16:13:31,334 INFO L226 Difference]: Without dead ends: 3549 [2021-10-07 16:13:31,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:13:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2021-10-07 16:13:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 1662. [2021-10-07 16:13:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1657 states have (on average 4.222691611345805) internal successors, (6997), 1661 states have internal predecessors, (6997), 0 states have call successors, (0), 0 states 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 16:13:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 6997 transitions. [2021-10-07 16:13:31,399 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 6997 transitions. Word has length 13 [2021-10-07 16:13:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:13:31,399 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 6997 transitions. [2021-10-07 16:13:31,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:13:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 6997 transitions. [2021-10-07 16:13:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:13:31,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:13:31,403 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1] [2021-10-07 16:13:31,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-07 16:13:31,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:13:31,617 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:13:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:13:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash 218721906, now seen corresponding path program 4 times [2021-10-07 16:13:31,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:13:31,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107764006] [2021-10-07 16:13:31,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:13:31,619 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:13:31,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:13:31,621 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:13:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 16:13:31,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:13:31,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:13:31,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:13:31,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:13:31,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:13:32,177 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:13:32,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:13:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:13:32,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:13:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:13:36,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:13:36,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107764006] [2021-10-07 16:13:36,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107764006] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:13:36,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:13:36,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 23 [2021-10-07 16:13:36,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561558742] [2021-10-07 16:13:36,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:13:36,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:13:36,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:13:36,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:13:36,071 INFO L87 Difference]: Start difference. First operand 1662 states and 6997 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 16:13:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:13:42,478 INFO L93 Difference]: Finished difference Result 3456 states and 13151 transitions. [2021-10-07 16:13:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:13:42,479 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 15 [2021-10-07 16:13:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:13:42,489 INFO L225 Difference]: With dead ends: 3456 [2021-10-07 16:13:42,489 INFO L226 Difference]: Without dead ends: 3456 [2021-10-07 16:13:42,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 5178.4ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 16:13:42,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2021-10-07 16:13:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 1932. [2021-10-07 16:13:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1927 states have (on average 4.305137519460301) internal successors, (8296), 1931 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states 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 16:13:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 8296 transitions. [2021-10-07 16:13:42,544 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 8296 transitions. Word has length 15 [2021-10-07 16:13:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:13:42,545 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 8296 transitions. [2021-10-07 16:13:42,545 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 16:13:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 8296 transitions. [2021-10-07 16:13:42,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:13:42,548 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:13:42,548 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2021-10-07 16:13:42,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-07 16:13:42,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:13:42,765 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:13:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:13:42,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1954108447, now seen corresponding path program 5 times [2021-10-07 16:13:42,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:13:42,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737406955] [2021-10-07 16:13:42,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:13:42,768 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:13:42,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:13:42,769 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:13:42,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 16:13:43,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 16:13:43,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:13:43,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:13:43,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:13:43,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:13:43,443 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:13:43,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:13:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:13:44,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:13:47,335 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 16:13:47,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:13:47,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737406955] [2021-10-07 16:13:47,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737406955] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:13:47,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:13:47,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-07 16:13:47,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48693550] [2021-10-07 16:13:47,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 16:13:47,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:13:47,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 16:13:47,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-10-07 16:13:47,337 INFO L87 Difference]: Start difference. First operand 1932 states and 8296 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:25,909 INFO L93 Difference]: Finished difference Result 7975 states and 31294 transitions. [2021-10-07 16:14:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-07 16:14:25,913 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 16:14:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:25,937 INFO L225 Difference]: With dead ends: 7975 [2021-10-07 16:14:25,938 INFO L226 Difference]: Without dead ends: 7975 [2021-10-07 16:14:25,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 26584.5ms TimeCoverageRelationStatistics Valid=690, Invalid=2850, Unknown=0, NotChecked=0, Total=3540 [2021-10-07 16:14:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7975 states. [2021-10-07 16:14:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7975 to 2326. [2021-10-07 16:14:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2321 states have (on average 4.335200344679017) internal successors, (10062), 2325 states have internal predecessors, (10062), 0 states have call successors, (0), 0 states 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 16:14:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 10062 transitions. [2021-10-07 16:14:26,065 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 10062 transitions. Word has length 15 [2021-10-07 16:14:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:26,066 INFO L470 AbstractCegarLoop]: Abstraction has 2326 states and 10062 transitions. [2021-10-07 16:14:26,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 10062 transitions. [2021-10-07 16:14:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:14:26,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:26,071 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 16:14:26,096 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 16:14:26,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:14:26,285 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:14:26,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:26,286 INFO L82 PathProgramCache]: Analyzing trace with hash 27071934, now seen corresponding path program 3 times [2021-10-07 16:14:26,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:26,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252880651] [2021-10-07 16:14:26,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:14:26,287 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:26,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:26,288 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:14:26,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 16:14:26,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 16:14:26,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:14:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:14:26,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:26,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:27,158 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:27,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:14:28,045 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 16:14:28,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:34,812 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 16:14:34,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:34,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252880651] [2021-10-07 16:14:34,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252880651] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:34,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:34,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:14:34,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071312646] [2021-10-07 16:14:34,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:14:34,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:34,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:14:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:14:34,816 INFO L87 Difference]: Start difference. First operand 2326 states and 10062 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 16:14:46,831 WARN L207 SmtUtils]: Spent 8.71 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 16:14:54,914 WARN L207 SmtUtils]: Spent 7.22 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:15:02,331 WARN L207 SmtUtils]: Spent 6.36 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 16:15:08,512 WARN L207 SmtUtils]: Spent 5.15 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-07 16:15:37,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:37,018 INFO L93 Difference]: Finished difference Result 28909 states and 129508 transitions. [2021-10-07 16:15:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:15:37,021 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 16:15:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:37,281 INFO L225 Difference]: With dead ends: 28909 [2021-10-07 16:15:37,282 INFO L226 Difference]: Without dead ends: 28909 [2021-10-07 16:15:37,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 55660.0ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:15:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28909 states. [2021-10-07 16:15:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28909 to 2342. [2021-10-07 16:15:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2337 states have (on average 4.319212665810869) internal successors, (10094), 2341 states have internal predecessors, (10094), 0 states have call successors, (0), 0 states 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 16:15:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 10094 transitions. [2021-10-07 16:15:37,954 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 10094 transitions. Word has length 16 [2021-10-07 16:15:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:37,958 INFO L470 AbstractCegarLoop]: Abstraction has 2342 states and 10094 transitions. [2021-10-07 16:15:37,958 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 16:15:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 10094 transitions. [2021-10-07 16:15:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 16:15:37,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:37,968 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1] [2021-10-07 16:15:37,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:38,181 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 16:15:38,181 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:15:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:38,183 INFO L82 PathProgramCache]: Analyzing trace with hash 364345362, now seen corresponding path program 6 times [2021-10-07 16:15:38,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:38,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593248114] [2021-10-07 16:15:38,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:15:38,184 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:38,195 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 16:15:38,264 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 16:15:38,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-07 16:15:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:38,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-07 16:15:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:38,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:39,043 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:39,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:39,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:44,951 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:44,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593248114] [2021-10-07 16:15:44,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593248114] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:44,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:44,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-07 16:15:44,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329644270] [2021-10-07 16:15:44,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 16:15:44,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 16:15:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-10-07 16:15:44,954 INFO L87 Difference]: Start difference. First operand 2342 states and 10094 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:01,545 INFO L93 Difference]: Finished difference Result 7407 states and 28298 transitions. [2021-10-07 16:16:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-07 16:16:01,547 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 16:16:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:01,578 INFO L225 Difference]: With dead ends: 7407 [2021-10-07 16:16:01,578 INFO L226 Difference]: Without dead ends: 7407 [2021-10-07 16:16:01,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 10572.1ms TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2021-10-07 16:16:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7407 states. [2021-10-07 16:16:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7407 to 2539. [2021-10-07 16:16:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2534 states have (on average 4.3318863456985) internal successors, (10977), 2538 states have internal predecessors, (10977), 0 states have call successors, (0), 0 states 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 16:16:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 10977 transitions. [2021-10-07 16:16:01,722 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 10977 transitions. Word has length 17 [2021-10-07 16:16:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:01,722 INFO L470 AbstractCegarLoop]: Abstraction has 2539 states and 10977 transitions. [2021-10-07 16:16:01,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 10977 transitions. [2021-10-07 16:16:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 16:16:01,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:01,734 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2021-10-07 16:16:01,755 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 16:16:01,949 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 16:16:01,949 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:16:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1808484991, now seen corresponding path program 7 times [2021-10-07 16:16:01,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:01,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013019392] [2021-10-07 16:16:01,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:16:01,951 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:01,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:01,953 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 16:16:01,987 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 16:16:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:16:02,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 16:16:02,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:02,654 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:02,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-07 16:16:03,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-07 16:16:05,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:05,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013019392] [2021-10-07 16:16:05,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013019392] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:05,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:05,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-07 16:16:05,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063191165] [2021-10-07 16:16:05,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 16:16:05,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:05,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 16:16:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-10-07 16:16:05,449 INFO L87 Difference]: Start difference. First operand 2539 states and 10977 transitions. Second operand has 20 states, 19 states have (on average 1.263157894736842) 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 16:16:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:24,263 INFO L93 Difference]: Finished difference Result 7315 states and 30149 transitions. [2021-10-07 16:16:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 16:16:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.263157894736842) 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 17 [2021-10-07 16:16:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:24,288 INFO L225 Difference]: With dead ends: 7315 [2021-10-07 16:16:24,288 INFO L226 Difference]: Without dead ends: 7315 [2021-10-07 16:16:24,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 17236.2ms TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 16:16:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7315 states. [2021-10-07 16:16:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7315 to 3126. [2021-10-07 16:16:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3126 states, 3121 states have (on average 4.490227491188722) internal successors, (14014), 3125 states have internal predecessors, (14014), 0 states have call successors, (0), 0 states 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 16:16:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3126 states to 3126 states and 14014 transitions. [2021-10-07 16:16:24,434 INFO L78 Accepts]: Start accepts. Automaton has 3126 states and 14014 transitions. Word has length 17 [2021-10-07 16:16:24,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:24,435 INFO L470 AbstractCegarLoop]: Abstraction has 3126 states and 14014 transitions. [2021-10-07 16:16:24,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.263157894736842) 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 16:16:24,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3126 states and 14014 transitions. [2021-10-07 16:16:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 16:16:24,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:24,440 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:24,456 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 16:16:24,641 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 16:16:24,641 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:16:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash 151762976, now seen corresponding path program 4 times [2021-10-07 16:16:24,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:24,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946047096] [2021-10-07 16:16:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:16:24,643 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:24,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:24,644 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 16:16:24,646 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 16:16:25,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:16:25,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:25,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:16:25,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:25,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:25,344 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:25,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:26,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:29,865 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 16:16:29,865 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:29,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946047096] [2021-10-07 16:16:29,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946047096] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:29,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:29,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 16:16:29,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609445264] [2021-10-07 16:16:29,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-07 16:16:29,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-07 16:16:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-10-07 16:16:29,868 INFO L87 Difference]: Start difference. First operand 3126 states and 14014 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 16:16:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:50,448 INFO L93 Difference]: Finished difference Result 8181 states and 32888 transitions. [2021-10-07 16:16:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 16:16:50,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 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 18 [2021-10-07 16:16:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:50,475 INFO L225 Difference]: With dead ends: 8181 [2021-10-07 16:16:50,475 INFO L226 Difference]: Without dead ends: 8181 [2021-10-07 16:16:50,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 11648.3ms TimeCoverageRelationStatistics Valid=700, Invalid=2722, Unknown=0, NotChecked=0, Total=3422 [2021-10-07 16:16:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8181 states. [2021-10-07 16:16:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8181 to 3605. [2021-10-07 16:16:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3600 states have (on average 4.482222222222222) internal successors, (16136), 3604 states have internal predecessors, (16136), 0 states have call successors, (0), 0 states 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 16:16:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 16136 transitions. [2021-10-07 16:16:50,642 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 16136 transitions. Word has length 18 [2021-10-07 16:16:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:50,642 INFO L470 AbstractCegarLoop]: Abstraction has 3605 states and 16136 transitions. [2021-10-07 16:16:50,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 16:16:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 16136 transitions. [2021-10-07 16:16:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 16:16:50,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:50,649 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] [2021-10-07 16:16:50,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:50,864 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 16:16:50,864 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:16:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:50,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1995513640, now seen corresponding path program 1 times [2021-10-07 16:16:50,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:50,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714923340] [2021-10-07 16:16:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:16:50,865 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:50,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:50,867 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 16:16:50,868 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 16:16:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:16:51,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 16:16:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:51,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:51,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:51,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714923340] [2021-10-07 16:16:51,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714923340] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:16:51,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:16:51,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:16:51,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159727139] [2021-10-07 16:16:51,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:16:51,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:51,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:16:51,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:16:51,424 INFO L87 Difference]: Start difference. First operand 3605 states and 16136 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:51,479 INFO L93 Difference]: Finished difference Result 4018 states and 17541 transitions. [2021-10-07 16:16:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:16:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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 16:16:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:51,502 INFO L225 Difference]: With dead ends: 4018 [2021-10-07 16:16:51,502 INFO L226 Difference]: Without dead ends: 3914 [2021-10-07 16:16:51,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:16:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2021-10-07 16:16:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3914. [2021-10-07 16:16:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3909 states have (on average 4.41570734203121) internal successors, (17261), 3913 states have internal predecessors, (17261), 0 states have call successors, (0), 0 states 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 16:16:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 17261 transitions. [2021-10-07 16:16:51,648 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 17261 transitions. Word has length 20 [2021-10-07 16:16:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:51,648 INFO L470 AbstractCegarLoop]: Abstraction has 3914 states and 17261 transitions. [2021-10-07 16:16:51,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 17261 transitions. [2021-10-07 16:16:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 16:16:51,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:51,657 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:51,668 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 16:16:51,864 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 16:16:51,865 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:16:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:51,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1958076287, now seen corresponding path program 5 times [2021-10-07 16:16:51,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:51,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845888296] [2021-10-07 16:16:51,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:16:51,867 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:51,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:51,868 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 16:16:51,869 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 16:16:52,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-07 16:16:52,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 16:16:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:52,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:52,630 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:52,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:16:53,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:58,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:58,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845888296] [2021-10-07 16:16:58,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845888296] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:58,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:58,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 31 [2021-10-07 16:16:58,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514305253] [2021-10-07 16:16:58,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:16:58,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:58,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:16:58,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:16:58,501 INFO L87 Difference]: Start difference. First operand 3914 states and 17261 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:29,039 INFO L93 Difference]: Finished difference Result 9242 states and 36846 transitions. [2021-10-07 16:17:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-07 16:17:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 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 16:17:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:29,080 INFO L225 Difference]: With dead ends: 9242 [2021-10-07 16:17:29,080 INFO L226 Difference]: Without dead ends: 9242 [2021-10-07 16:17:29,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 19926.0ms TimeCoverageRelationStatistics Valid=729, Invalid=3177, Unknown=0, NotChecked=0, Total=3906 [2021-10-07 16:17:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2021-10-07 16:17:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 4248. [2021-10-07 16:17:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4243 states have (on average 4.435776573179354) internal successors, (18821), 4247 states have internal predecessors, (18821), 0 states have call successors, (0), 0 states 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 16:17:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 18821 transitions. [2021-10-07 16:17:29,339 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 18821 transitions. Word has length 20 [2021-10-07 16:17:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:29,341 INFO L470 AbstractCegarLoop]: Abstraction has 4248 states and 18821 transitions. [2021-10-07 16:17:29,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 18821 transitions. [2021-10-07 16:17:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:17:29,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:29,351 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:29,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-10-07 16:17:29,565 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 16:17:29,566 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:17:29,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:29,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1460226205, now seen corresponding path program 1 times [2021-10-07 16:17:29,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:29,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427214302] [2021-10-07 16:17:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:17:29,567 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:29,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:29,569 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 16:17:29,570 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 16:17:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:17:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:17:29,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:30,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:30,274 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:30,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427214302] [2021-10-07 16:17:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427214302] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:17:30,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:17:30,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-07 16:17:30,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598546242] [2021-10-07 16:17:30,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 16:17:30,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 16:17:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:17:30,276 INFO L87 Difference]: Start difference. First operand 4248 states and 18821 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 16:17:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:30,398 INFO L93 Difference]: Finished difference Result 4146 states and 18171 transitions. [2021-10-07 16:17:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:17:30,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 22 [2021-10-07 16:17:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:30,416 INFO L225 Difference]: With dead ends: 4146 [2021-10-07 16:17:30,416 INFO L226 Difference]: Without dead ends: 4146 [2021-10-07 16:17:30,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-07 16:17:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2021-10-07 16:17:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3930. [2021-10-07 16:17:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3930 states, 3925 states have (on average 4.448662420382165) internal successors, (17461), 3929 states have internal predecessors, (17461), 0 states have call successors, (0), 0 states 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 16:17:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 17461 transitions. [2021-10-07 16:17:30,638 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 17461 transitions. Word has length 22 [2021-10-07 16:17:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:30,639 INFO L470 AbstractCegarLoop]: Abstraction has 3930 states and 17461 transitions. [2021-10-07 16:17:30,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 16:17:30,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 17461 transitions. [2021-10-07 16:17:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:17:30,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:30,647 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:30,667 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 16:17:30,860 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 16:17:30,860 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:17:30,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:30,861 INFO L82 PathProgramCache]: Analyzing trace with hash 411740021, now seen corresponding path program 1 times [2021-10-07 16:17:30,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:30,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490179378] [2021-10-07 16:17:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:17:30,862 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:30,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:30,864 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 16:17:30,866 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 16:17:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:17:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:17:31,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:31,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:31,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:31,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490179378] [2021-10-07 16:17:31,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490179378] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:31,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:31,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:17:31,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587414288] [2021-10-07 16:17:31,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:17:31,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:31,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:17:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:17:31,961 INFO L87 Difference]: Start difference. First operand 3930 states and 17461 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:17:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:33,907 INFO L93 Difference]: Finished difference Result 4798 states and 20402 transitions. [2021-10-07 16:17:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:17:33,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:17:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:33,922 INFO L225 Difference]: With dead ends: 4798 [2021-10-07 16:17:33,923 INFO L226 Difference]: Without dead ends: 4798 [2021-10-07 16:17:33,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1295.4ms TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:17:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-10-07 16:17:34,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4116. [2021-10-07 16:17:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4111 states have (on average 4.378010216492338) internal successors, (17998), 4115 states have internal predecessors, (17998), 0 states have call successors, (0), 0 states 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 16:17:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 17998 transitions. [2021-10-07 16:17:34,060 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 17998 transitions. Word has length 22 [2021-10-07 16:17:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:34,060 INFO L470 AbstractCegarLoop]: Abstraction has 4116 states and 17998 transitions. [2021-10-07 16:17:34,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:17:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 17998 transitions. [2021-10-07 16:17:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:17:34,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:34,067 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:34,085 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 16:17:34,280 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 16:17:34,281 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:17:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:34,282 INFO L82 PathProgramCache]: Analyzing trace with hash 456188917, now seen corresponding path program 2 times [2021-10-07 16:17:34,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:34,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40645995] [2021-10-07 16:17:34,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:17:34,283 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:34,284 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 16:17:34,285 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 16:17:34,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:17:34,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:34,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:17:34,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:35,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:35,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:35,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40645995] [2021-10-07 16:17:35,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40645995] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:35,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:35,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:17:35,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093853354] [2021-10-07 16:17:35,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:17:35,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:17:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:17:35,564 INFO L87 Difference]: Start difference. First operand 4116 states and 17998 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:17:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:38,307 INFO L93 Difference]: Finished difference Result 5402 states and 22264 transitions. [2021-10-07 16:17:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:17:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:17:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:38,325 INFO L225 Difference]: With dead ends: 5402 [2021-10-07 16:17:38,325 INFO L226 Difference]: Without dead ends: 5402 [2021-10-07 16:17:38,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1865.1ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:17:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-10-07 16:17:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4158. [2021-10-07 16:17:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4153 states have (on average 4.37346496508548) internal successors, (18163), 4157 states have internal predecessors, (18163), 0 states have call successors, (0), 0 states 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 16:17:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 18163 transitions. [2021-10-07 16:17:38,452 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 18163 transitions. Word has length 22 [2021-10-07 16:17:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:38,452 INFO L470 AbstractCegarLoop]: Abstraction has 4158 states and 18163 transitions. [2021-10-07 16:17:38,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:17:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 18163 transitions. [2021-10-07 16:17:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:17:38,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:38,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:38,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-10-07 16:17:38,658 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 16:17:38,659 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:17:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:38,660 INFO L82 PathProgramCache]: Analyzing trace with hash 385834905, now seen corresponding path program 3 times [2021-10-07 16:17:38,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:38,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254820851] [2021-10-07 16:17:38,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:17:38,661 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:38,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:38,663 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 16:17:38,664 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 16:17:39,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:17:39,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:39,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:17:39,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:39,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:39,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:39,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254820851] [2021-10-07 16:17:39,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254820851] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:17:39,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:17:39,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:17:39,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188208170] [2021-10-07 16:17:39,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:17:39,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:17:39,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:17:39,841 INFO L87 Difference]: Start difference. First operand 4158 states and 18163 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:17:40,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:40,357 INFO L93 Difference]: Finished difference Result 4684 states and 20092 transitions. [2021-10-07 16:17:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:17:40,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:17:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:40,372 INFO L225 Difference]: With dead ends: 4684 [2021-10-07 16:17:40,373 INFO L226 Difference]: Without dead ends: 4672 [2021-10-07 16:17:40,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-10-07 16:17:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2021-10-07 16:17:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 4158. [2021-10-07 16:17:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4153 states have (on average 4.370575487599326) internal successors, (18151), 4157 states have internal predecessors, (18151), 0 states have call successors, (0), 0 states 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 16:17:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 18151 transitions. [2021-10-07 16:17:40,514 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 18151 transitions. Word has length 22 [2021-10-07 16:17:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:40,515 INFO L470 AbstractCegarLoop]: Abstraction has 4158 states and 18151 transitions. [2021-10-07 16:17:40,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:17:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 18151 transitions. [2021-10-07 16:17:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:17:40,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:40,520 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:40,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:40,733 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 16:17:40,734 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:17:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:40,735 INFO L82 PathProgramCache]: Analyzing trace with hash 819501013, now seen corresponding path program 4 times [2021-10-07 16:17:40,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:40,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41922386] [2021-10-07 16:17:40,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:17:40,737 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:40,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:40,738 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 16:17:40,740 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 16:17:41,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:17:41,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:41,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:17:41,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:41,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:41,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:41,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41922386] [2021-10-07 16:17:41,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41922386] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:41,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:41,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:17:41,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094776650] [2021-10-07 16:17:41,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:17:41,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:17:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:17:41,908 INFO L87 Difference]: Start difference. First operand 4158 states and 18151 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:17:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:43,774 INFO L93 Difference]: Finished difference Result 5526 states and 22599 transitions. [2021-10-07 16:17:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:17:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:17:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:43,791 INFO L225 Difference]: With dead ends: 5526 [2021-10-07 16:17:43,791 INFO L226 Difference]: Without dead ends: 5526 [2021-10-07 16:17:43,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1286.9ms TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:17:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-10-07 16:17:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4182. [2021-10-07 16:17:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4182 states, 4177 states have (on average 4.365573378022504) internal successors, (18235), 4181 states have internal predecessors, (18235), 0 states have call successors, (0), 0 states 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 16:17:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4182 states to 4182 states and 18235 transitions. [2021-10-07 16:17:43,925 INFO L78 Accepts]: Start accepts. Automaton has 4182 states and 18235 transitions. Word has length 22 [2021-10-07 16:17:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:43,926 INFO L470 AbstractCegarLoop]: Abstraction has 4182 states and 18235 transitions. [2021-10-07 16:17:43,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:17:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4182 states and 18235 transitions. [2021-10-07 16:17:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:17:43,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:43,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:43,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-10-07 16:17:44,131 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 16:17:44,132 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:17:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:44,133 INFO L82 PathProgramCache]: Analyzing trace with hash 749147001, now seen corresponding path program 5 times [2021-10-07 16:17:44,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:44,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481583102] [2021-10-07 16:17:44,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:17:44,135 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:44,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:44,136 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:44,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-07 16:17:44,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:17:44,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:44,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:17:44,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:44,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:45,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:45,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481583102] [2021-10-07 16:17:45,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481583102] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:45,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:45,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 16:17:45,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136169649] [2021-10-07 16:17:45,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 16:17:45,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 16:17:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:17:45,354 INFO L87 Difference]: Start difference. First operand 4182 states and 18235 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:47,236 INFO L93 Difference]: Finished difference Result 4736 states and 20262 transitions. [2021-10-07 16:17:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 16:17:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:17:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:47,252 INFO L225 Difference]: With dead ends: 4736 [2021-10-07 16:17:47,252 INFO L226 Difference]: Without dead ends: 4736 [2021-10-07 16:17:47,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1166.3ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-10-07 16:17:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-10-07 16:17:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 4312. [2021-10-07 16:17:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4312 states, 4307 states have (on average 4.359647086138843) internal successors, (18777), 4311 states have internal predecessors, (18777), 0 states have call successors, (0), 0 states 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 16:17:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4312 states to 4312 states and 18777 transitions. [2021-10-07 16:17:47,377 INFO L78 Accepts]: Start accepts. Automaton has 4312 states and 18777 transitions. Word has length 22 [2021-10-07 16:17:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:47,377 INFO L470 AbstractCegarLoop]: Abstraction has 4312 states and 18777 transitions. [2021-10-07 16:17:47,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4312 states and 18777 transitions. [2021-10-07 16:17:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:17:47,383 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:47,383 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:47,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:47,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:47,595 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:17:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:47,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1826961491, now seen corresponding path program 6 times [2021-10-07 16:17:47,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:47,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702945179] [2021-10-07 16:17:47,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:17:47,598 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:47,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:47,599 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:47,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-07 16:17:48,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:17:48,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:17:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:48,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:48,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:48,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702945179] [2021-10-07 16:17:48,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702945179] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:48,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:48,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:17:48,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016308904] [2021-10-07 16:17:48,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:17:48,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:17:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:17:48,949 INFO L87 Difference]: Start difference. First operand 4312 states and 18777 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:17:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:51,076 INFO L93 Difference]: Finished difference Result 7180 states and 29365 transitions. [2021-10-07 16:17:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:17:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:17:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:51,101 INFO L225 Difference]: With dead ends: 7180 [2021-10-07 16:17:51,101 INFO L226 Difference]: Without dead ends: 7180 [2021-10-07 16:17:51,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1245.2ms TimeCoverageRelationStatistics Valid=366, Invalid=690, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 16:17:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7180 states. [2021-10-07 16:17:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7180 to 4756. [2021-10-07 16:17:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4756 states, 4751 states have (on average 4.423279309619027) internal successors, (21015), 4755 states have internal predecessors, (21015), 0 states have call successors, (0), 0 states 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 16:17:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4756 states to 4756 states and 21015 transitions. [2021-10-07 16:17:51,273 INFO L78 Accepts]: Start accepts. Automaton has 4756 states and 21015 transitions. Word has length 22 [2021-10-07 16:17:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:51,274 INFO L470 AbstractCegarLoop]: Abstraction has 4756 states and 21015 transitions. [2021-10-07 16:17:51,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:17:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4756 states and 21015 transitions. [2021-10-07 16:17:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:17:51,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:51,282 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:51,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:51,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:51,483 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:17:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:51,483 INFO L82 PathProgramCache]: Analyzing trace with hash 768089783, now seen corresponding path program 7 times [2021-10-07 16:17:51,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:51,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476616362] [2021-10-07 16:17:51,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:17:51,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:51,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:51,487 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:51,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-07 16:17:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:17:51,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:17:51,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:52,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:52,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:52,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476616362] [2021-10-07 16:17:52,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476616362] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:52,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:52,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:17:52,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792871074] [2021-10-07 16:17:52,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:17:52,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:17:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:17:52,730 INFO L87 Difference]: Start difference. First operand 4756 states and 21015 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:54,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:54,781 INFO L93 Difference]: Finished difference Result 6878 states and 28361 transitions. [2021-10-07 16:17:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:17:54,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 22 [2021-10-07 16:17:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:54,806 INFO L225 Difference]: With dead ends: 6878 [2021-10-07 16:17:54,806 INFO L226 Difference]: Without dead ends: 6878 [2021-10-07 16:17:54,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1226.0ms TimeCoverageRelationStatistics Valid=374, Invalid=682, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 16:17:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2021-10-07 16:17:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 4878. [2021-10-07 16:17:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4878 states, 4873 states have (on average 4.385799302277857) internal successors, (21372), 4877 states have internal predecessors, (21372), 0 states have call successors, (0), 0 states 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 16:17:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4878 states to 4878 states and 21372 transitions. [2021-10-07 16:17:54,990 INFO L78 Accepts]: Start accepts. Automaton has 4878 states and 21372 transitions. Word has length 22 [2021-10-07 16:17:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:54,990 INFO L470 AbstractCegarLoop]: Abstraction has 4878 states and 21372 transitions. [2021-10-07 16:17:54,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4878 states and 21372 transitions. [2021-10-07 16:17:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:17:54,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:54,997 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:55,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:55,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:55,198 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:17:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:55,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2065238225, now seen corresponding path program 8 times [2021-10-07 16:17:55,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:55,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690541197] [2021-10-07 16:17:55,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:17:55,200 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:55,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:55,202 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:55,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-07 16:17:55,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:17:55,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:17:55,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:56,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:56,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:56,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690541197] [2021-10-07 16:17:56,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690541197] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:56,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:56,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:17:56,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967581571] [2021-10-07 16:17:56,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:17:56,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:17:56,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:17:56,674 INFO L87 Difference]: Start difference. First operand 4878 states and 21372 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:00,004 INFO L93 Difference]: Finished difference Result 7848 states and 31428 transitions. [2021-10-07 16:18:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 16:18:00,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:18:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:00,031 INFO L225 Difference]: With dead ends: 7848 [2021-10-07 16:18:00,031 INFO L226 Difference]: Without dead ends: 7848 [2021-10-07 16:18:00,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2241.4ms TimeCoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 16:18:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2021-10-07 16:18:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 4916. [2021-10-07 16:18:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4916 states, 4911 states have (on average 4.3919771940541645) internal successors, (21569), 4915 states have internal predecessors, (21569), 0 states have call successors, (0), 0 states 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 16:18:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4916 states to 4916 states and 21569 transitions. [2021-10-07 16:18:00,236 INFO L78 Accepts]: Start accepts. Automaton has 4916 states and 21569 transitions. Word has length 22 [2021-10-07 16:18:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:00,236 INFO L470 AbstractCegarLoop]: Abstraction has 4916 states and 21569 transitions. [2021-10-07 16:18:00,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 4916 states and 21569 transitions. [2021-10-07 16:18:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:00,242 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:00,243 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:00,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-10-07 16:18:00,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:00,443 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:00,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2135592237, now seen corresponding path program 9 times [2021-10-07 16:18:00,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:00,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467588625] [2021-10-07 16:18:00,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:18:00,446 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:00,447 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:00,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-07 16:18:01,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:18:01,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:01,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:01,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:01,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:01,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467588625] [2021-10-07 16:18:01,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467588625] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:18:01,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:18:01,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:18:01,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982784819] [2021-10-07 16:18:01,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:18:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:18:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:18:01,818 INFO L87 Difference]: Start difference. First operand 4916 states and 21569 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:18:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:02,259 INFO L93 Difference]: Finished difference Result 5350 states and 23049 transitions. [2021-10-07 16:18:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:18:02,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:18:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:02,277 INFO L225 Difference]: With dead ends: 5350 [2021-10-07 16:18:02,277 INFO L226 Difference]: Without dead ends: 5338 [2021-10-07 16:18:02,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:18:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-10-07 16:18:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4904. [2021-10-07 16:18:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4904 states, 4899 states have (on average 4.394162073892631) internal successors, (21527), 4903 states have internal predecessors, (21527), 0 states have call successors, (0), 0 states 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 16:18:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4904 states to 4904 states and 21527 transitions. [2021-10-07 16:18:02,454 INFO L78 Accepts]: Start accepts. Automaton has 4904 states and 21527 transitions. Word has length 22 [2021-10-07 16:18:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:02,454 INFO L470 AbstractCegarLoop]: Abstraction has 4904 states and 21527 transitions. [2021-10-07 16:18:02,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:18:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4904 states and 21527 transitions. [2021-10-07 16:18:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:02,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:02,460 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:02,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:02,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:02,661 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1161895243, now seen corresponding path program 10 times [2021-10-07 16:18:02,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:02,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863738780] [2021-10-07 16:18:02,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:18:02,664 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:02,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:02,665 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:02,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-07 16:18:03,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:18:03,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:03,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:03,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:04,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:04,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863738780] [2021-10-07 16:18:04,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863738780] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:04,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:04,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:18:04,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831313195] [2021-10-07 16:18:04,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:18:04,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:18:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:18:04,181 INFO L87 Difference]: Start difference. First operand 4904 states and 21527 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:08,106 INFO L93 Difference]: Finished difference Result 8232 states and 32942 transitions. [2021-10-07 16:18:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 16:18:08,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:18:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:08,130 INFO L225 Difference]: With dead ends: 8232 [2021-10-07 16:18:08,131 INFO L226 Difference]: Without dead ends: 8232 [2021-10-07 16:18:08,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2787.5ms TimeCoverageRelationStatistics Valid=492, Invalid=1230, Unknown=0, NotChecked=0, Total=1722 [2021-10-07 16:18:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2021-10-07 16:18:08,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 5000. [2021-10-07 16:18:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4995 states have (on average 4.423823823823824) internal successors, (22097), 4999 states have internal predecessors, (22097), 0 states have call successors, (0), 0 states 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 16:18:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 22097 transitions. [2021-10-07 16:18:08,355 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 22097 transitions. Word has length 22 [2021-10-07 16:18:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:08,356 INFO L470 AbstractCegarLoop]: Abstraction has 5000 states and 22097 transitions. [2021-10-07 16:18:08,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 22097 transitions. [2021-10-07 16:18:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:08,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:08,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:08,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:08,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:08,566 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2146005559, now seen corresponding path program 11 times [2021-10-07 16:18:08,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:08,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386683076] [2021-10-07 16:18:08,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:18:08,569 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:08,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:08,569 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:08,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-07 16:18:09,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:18:09,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:09,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:18:09,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:09,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:10,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:10,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386683076] [2021-10-07 16:18:10,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386683076] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:10,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:10,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-10-07 16:18:10,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915440367] [2021-10-07 16:18:10,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 16:18:10,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 16:18:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:18:10,238 INFO L87 Difference]: Start difference. First operand 5000 states and 22097 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:12,423 INFO L93 Difference]: Finished difference Result 7502 states and 30888 transitions. [2021-10-07 16:18:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:18:12,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 22 [2021-10-07 16:18:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:12,446 INFO L225 Difference]: With dead ends: 7502 [2021-10-07 16:18:12,446 INFO L226 Difference]: Without dead ends: 7502 [2021-10-07 16:18:12,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1342.4ms TimeCoverageRelationStatistics Valid=332, Invalid=660, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:18:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7502 states. [2021-10-07 16:18:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7502 to 5154. [2021-10-07 16:18:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5154 states, 5149 states have (on average 4.453291901340066) internal successors, (22930), 5153 states have internal predecessors, (22930), 0 states have call successors, (0), 0 states 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 16:18:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5154 states to 5154 states and 22930 transitions. [2021-10-07 16:18:12,602 INFO L78 Accepts]: Start accepts. Automaton has 5154 states and 22930 transitions. Word has length 22 [2021-10-07 16:18:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:12,602 INFO L470 AbstractCegarLoop]: Abstraction has 5154 states and 22930 transitions. [2021-10-07 16:18:12,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5154 states and 22930 transitions. [2021-10-07 16:18:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:12,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:12,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:12,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-10-07 16:18:12,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:12,810 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:12,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:12,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1729137013, now seen corresponding path program 12 times [2021-10-07 16:18:12,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:12,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150016784] [2021-10-07 16:18:12,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:18:12,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:12,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:12,813 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:12,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-07 16:18:13,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:18:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:13,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:13,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:14,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:14,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150016784] [2021-10-07 16:18:14,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150016784] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:14,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:14,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:18:14,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821336844] [2021-10-07 16:18:14,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:18:14,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:18:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:18:14,280 INFO L87 Difference]: Start difference. First operand 5154 states and 22930 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:16,548 INFO L93 Difference]: Finished difference Result 6800 states and 28163 transitions. [2021-10-07 16:18:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:18:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:18:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:16,572 INFO L225 Difference]: With dead ends: 6800 [2021-10-07 16:18:16,573 INFO L226 Difference]: Without dead ends: 6800 [2021-10-07 16:18:16,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1471.5ms TimeCoverageRelationStatistics Valid=363, Invalid=897, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:18:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6800 states. [2021-10-07 16:18:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6800 to 5178. [2021-10-07 16:18:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5173 states have (on average 4.448869128165475) internal successors, (23014), 5177 states have internal predecessors, (23014), 0 states have call successors, (0), 0 states 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 16:18:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 23014 transitions. [2021-10-07 16:18:16,705 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 23014 transitions. Word has length 22 [2021-10-07 16:18:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:16,705 INFO L470 AbstractCegarLoop]: Abstraction has 5178 states and 23014 transitions. [2021-10-07 16:18:16,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 23014 transitions. [2021-10-07 16:18:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:16,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:16,712 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:16,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:16,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:16,913 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1658783001, now seen corresponding path program 13 times [2021-10-07 16:18:16,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:16,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713699763] [2021-10-07 16:18:16,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:18:16,915 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:16,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:16,917 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:16,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-07 16:18:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:18:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:17,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:18,225 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:18,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713699763] [2021-10-07 16:18:18,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713699763] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:18:18,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:18:18,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:18:18,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747616677] [2021-10-07 16:18:18,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:18:18,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:18,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:18:18,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:18:18,227 INFO L87 Difference]: Start difference. First operand 5178 states and 23014 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:18:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:18,682 INFO L93 Difference]: Finished difference Result 5774 states and 25015 transitions. [2021-10-07 16:18:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:18:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:18:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:18,701 INFO L225 Difference]: With dead ends: 5774 [2021-10-07 16:18:18,701 INFO L226 Difference]: Without dead ends: 5762 [2021-10-07 16:18:18,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:18:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5762 states. [2021-10-07 16:18:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5762 to 5166. [2021-10-07 16:18:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5166 states, 5161 states have (on average 4.451075372989731) internal successors, (22972), 5165 states have internal predecessors, (22972), 0 states have call successors, (0), 0 states 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 16:18:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 22972 transitions. [2021-10-07 16:18:18,837 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 22972 transitions. Word has length 22 [2021-10-07 16:18:18,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:18,838 INFO L470 AbstractCegarLoop]: Abstraction has 5166 states and 22972 transitions. [2021-10-07 16:18:18,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:18:18,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 22972 transitions. [2021-10-07 16:18:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:18,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:18,845 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:18,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:19,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:19,046 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:19,047 INFO L82 PathProgramCache]: Analyzing trace with hash -977979369, now seen corresponding path program 14 times [2021-10-07 16:18:19,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:19,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442850252] [2021-10-07 16:18:19,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:18:19,049 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:19,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:19,049 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:19,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-07 16:18:19,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:18:19,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:20,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:20,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:20,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442850252] [2021-10-07 16:18:20,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442850252] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:18:20,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:18:20,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:18:20,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210490033] [2021-10-07 16:18:20,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:18:20,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:20,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:18:20,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:18:20,404 INFO L87 Difference]: Start difference. First operand 5166 states and 22972 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:18:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:20,831 INFO L93 Difference]: Finished difference Result 5750 states and 24955 transitions. [2021-10-07 16:18:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:18:20,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:18:20,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:20,853 INFO L225 Difference]: With dead ends: 5750 [2021-10-07 16:18:20,853 INFO L226 Difference]: Without dead ends: 5726 [2021-10-07 16:18:20,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:18:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2021-10-07 16:18:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 5154. [2021-10-07 16:18:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5154 states, 5149 states have (on average 4.453291901340066) internal successors, (22930), 5153 states have internal predecessors, (22930), 0 states have call successors, (0), 0 states 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 16:18:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5154 states to 5154 states and 22930 transitions. [2021-10-07 16:18:21,004 INFO L78 Accepts]: Start accepts. Automaton has 5154 states and 22930 transitions. Word has length 22 [2021-10-07 16:18:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:21,004 INFO L470 AbstractCegarLoop]: Abstraction has 5154 states and 22930 transitions. [2021-10-07 16:18:21,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:18:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 5154 states and 22930 transitions. [2021-10-07 16:18:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:21,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:21,011 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:21,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:21,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:21,212 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:21,213 INFO L82 PathProgramCache]: Analyzing trace with hash 607502159, now seen corresponding path program 15 times [2021-10-07 16:18:21,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:21,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023946709] [2021-10-07 16:18:21,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:18:21,214 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:21,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:21,215 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:21,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-07 16:18:21,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:18:21,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:21,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:21,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:22,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:22,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:22,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023946709] [2021-10-07 16:18:22,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023946709] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:22,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:22,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:18:22,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231466] [2021-10-07 16:18:22,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:18:22,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:22,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:18:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:18:22,766 INFO L87 Difference]: Start difference. First operand 5154 states and 22930 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:25,673 INFO L93 Difference]: Finished difference Result 7192 states and 29663 transitions. [2021-10-07 16:18:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 16:18:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:18:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:25,696 INFO L225 Difference]: With dead ends: 7192 [2021-10-07 16:18:25,697 INFO L226 Difference]: Without dead ends: 7192 [2021-10-07 16:18:25,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1768.8ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:18:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7192 states. [2021-10-07 16:18:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7192 to 5192. [2021-10-07 16:18:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5192 states, 5187 states have (on average 4.458646616541353) internal successors, (23127), 5191 states have internal predecessors, (23127), 0 states have call successors, (0), 0 states 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 16:18:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5192 states to 5192 states and 23127 transitions. [2021-10-07 16:18:25,885 INFO L78 Accepts]: Start accepts. Automaton has 5192 states and 23127 transitions. Word has length 22 [2021-10-07 16:18:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:25,885 INFO L470 AbstractCegarLoop]: Abstraction has 5192 states and 23127 transitions. [2021-10-07 16:18:25,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5192 states and 23127 transitions. [2021-10-07 16:18:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:25,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:25,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:25,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:26,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:26,095 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:26,096 INFO L82 PathProgramCache]: Analyzing trace with hash 537148147, now seen corresponding path program 16 times [2021-10-07 16:18:26,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:26,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238588282] [2021-10-07 16:18:26,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:18:26,097 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:26,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:26,098 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:26,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-07 16:18:26,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:18:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:27,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:27,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:27,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238588282] [2021-10-07 16:18:27,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238588282] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:18:27,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:18:27,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:18:27,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088719310] [2021-10-07 16:18:27,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:18:27,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:27,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:18:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:18:27,472 INFO L87 Difference]: Start difference. First operand 5192 states and 23127 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:18:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:27,929 INFO L93 Difference]: Finished difference Result 5732 states and 24990 transitions. [2021-10-07 16:18:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:18:27,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:18:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:27,949 INFO L225 Difference]: With dead ends: 5732 [2021-10-07 16:18:27,949 INFO L226 Difference]: Without dead ends: 5720 [2021-10-07 16:18:27,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:18:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2021-10-07 16:18:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 5180. [2021-10-07 16:18:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5180 states, 5175 states have (on average 4.460869565217391) internal successors, (23085), 5179 states have internal predecessors, (23085), 0 states have call successors, (0), 0 states 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 16:18:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5180 states to 5180 states and 23085 transitions. [2021-10-07 16:18:28,068 INFO L78 Accepts]: Start accepts. Automaton has 5180 states and 23085 transitions. Word has length 22 [2021-10-07 16:18:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:28,068 INFO L470 AbstractCegarLoop]: Abstraction has 5180 states and 23085 transitions. [2021-10-07 16:18:28,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:18:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5180 states and 23085 transitions. [2021-10-07 16:18:28,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:28,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:28,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:28,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:28,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:28,276 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash -460331669, now seen corresponding path program 17 times [2021-10-07 16:18:28,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:28,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328718606] [2021-10-07 16:18:28,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:18:28,278 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:28,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:28,280 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:28,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-07 16:18:28,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:18:28,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:28,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:18:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:29,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:29,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:29,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328718606] [2021-10-07 16:18:29,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328718606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:29,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:29,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-10-07 16:18:29,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068930575] [2021-10-07 16:18:29,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 16:18:29,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:29,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 16:18:29,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:18:29,894 INFO L87 Difference]: Start difference. First operand 5180 states and 23085 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:34,152 INFO L93 Difference]: Finished difference Result 7814 states and 31908 transitions. [2021-10-07 16:18:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 16:18:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:18:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:34,178 INFO L225 Difference]: With dead ends: 7814 [2021-10-07 16:18:34,179 INFO L226 Difference]: Without dead ends: 7814 [2021-10-07 16:18:34,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 3277.4ms TimeCoverageRelationStatistics Valid=601, Invalid=1291, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 16:18:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7814 states. [2021-10-07 16:18:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7814 to 4914. [2021-10-07 16:18:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4914 states, 4909 states have (on average 4.424118965166022) internal successors, (21718), 4913 states have internal predecessors, (21718), 0 states have call successors, (0), 0 states 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 16:18:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4914 states to 4914 states and 21718 transitions. [2021-10-07 16:18:34,322 INFO L78 Accepts]: Start accepts. Automaton has 4914 states and 21718 transitions. Word has length 22 [2021-10-07 16:18:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:34,322 INFO L470 AbstractCegarLoop]: Abstraction has 4914 states and 21718 transitions. [2021-10-07 16:18:34,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:34,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4914 states and 21718 transitions. [2021-10-07 16:18:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:34,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:34,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:34,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:34,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:34,530 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1755329963, now seen corresponding path program 18 times [2021-10-07 16:18:34,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:34,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570588906] [2021-10-07 16:18:34,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:18:34,533 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:34,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:34,534 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:34,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-07 16:18:35,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:18:35,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:35,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:35,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:35,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:36,044 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:36,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570588906] [2021-10-07 16:18:36,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570588906] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:36,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:36,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:18:36,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527691604] [2021-10-07 16:18:36,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:18:36,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:18:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:18:36,047 INFO L87 Difference]: Start difference. First operand 4914 states and 21718 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:38,283 INFO L93 Difference]: Finished difference Result 8352 states and 35612 transitions. [2021-10-07 16:18:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:18:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:18:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:38,314 INFO L225 Difference]: With dead ends: 8352 [2021-10-07 16:18:38,314 INFO L226 Difference]: Without dead ends: 8352 [2021-10-07 16:18:38,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1333.3ms TimeCoverageRelationStatistics Valid=394, Invalid=866, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:18:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-10-07 16:18:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 5142. [2021-10-07 16:18:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5137 states have (on average 4.472260073973136) internal successors, (22974), 5141 states have internal predecessors, (22974), 0 states have call successors, (0), 0 states 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 16:18:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 22974 transitions. [2021-10-07 16:18:38,463 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 22974 transitions. Word has length 22 [2021-10-07 16:18:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:38,463 INFO L470 AbstractCegarLoop]: Abstraction has 5142 states and 22974 transitions. [2021-10-07 16:18:38,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 22974 transitions. [2021-10-07 16:18:38,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:38,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:38,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:38,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:38,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:38,672 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 55413941, now seen corresponding path program 19 times [2021-10-07 16:18:38,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:38,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180135986] [2021-10-07 16:18:38,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:18:38,674 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:38,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:38,675 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:38,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-07 16:18:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:18:39,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:39,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:40,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:40,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180135986] [2021-10-07 16:18:40,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180135986] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:40,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:40,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:18:40,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243468952] [2021-10-07 16:18:40,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:18:40,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:18:40,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:18:40,108 INFO L87 Difference]: Start difference. First operand 5142 states and 22974 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:42,360 INFO L93 Difference]: Finished difference Result 8238 states and 35208 transitions. [2021-10-07 16:18:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:18:42,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 22 [2021-10-07 16:18:42,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:42,390 INFO L225 Difference]: With dead ends: 8238 [2021-10-07 16:18:42,391 INFO L226 Difference]: Without dead ends: 8238 [2021-10-07 16:18:42,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1292.8ms TimeCoverageRelationStatistics Valid=385, Invalid=875, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:18:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2021-10-07 16:18:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 5028. [2021-10-07 16:18:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5023 states have (on average 4.4373880151304) internal successors, (22289), 5027 states have internal predecessors, (22289), 0 states have call successors, (0), 0 states 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 16:18:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 22289 transitions. [2021-10-07 16:18:42,537 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 22289 transitions. Word has length 22 [2021-10-07 16:18:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:42,537 INFO L470 AbstractCegarLoop]: Abstraction has 5028 states and 22289 transitions. [2021-10-07 16:18:42,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:42,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 22289 transitions. [2021-10-07 16:18:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:42,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:42,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:42,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:42,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:42,746 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:42,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1809275645, now seen corresponding path program 20 times [2021-10-07 16:18:42,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:42,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672880457] [2021-10-07 16:18:42,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:18:42,747 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:42,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:42,748 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:42,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-07 16:18:43,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:18:43,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:43,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:43,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:43,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:44,209 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:44,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672880457] [2021-10-07 16:18:44,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672880457] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:44,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:44,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:18:44,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458362593] [2021-10-07 16:18:44,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:18:44,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:44,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:18:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:18:44,212 INFO L87 Difference]: Start difference. First operand 5028 states and 22289 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:46,500 INFO L93 Difference]: Finished difference Result 7808 states and 33448 transitions. [2021-10-07 16:18:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 16:18:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 22 [2021-10-07 16:18:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:46,527 INFO L225 Difference]: With dead ends: 7808 [2021-10-07 16:18:46,527 INFO L226 Difference]: Without dead ends: 7808 [2021-10-07 16:18:46,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1376.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1135, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 16:18:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2021-10-07 16:18:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 5142. [2021-10-07 16:18:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5137 states have (on average 4.405684251508663) internal successors, (22632), 5141 states have internal predecessors, (22632), 0 states have call successors, (0), 0 states 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 16:18:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 22632 transitions. [2021-10-07 16:18:46,717 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 22632 transitions. Word has length 22 [2021-10-07 16:18:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:46,717 INFO L470 AbstractCegarLoop]: Abstraction has 5142 states and 22632 transitions. [2021-10-07 16:18:46,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 22632 transitions. [2021-10-07 16:18:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:46,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:46,725 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:46,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:46,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:46,926 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:46,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:46,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1521046059, now seen corresponding path program 21 times [2021-10-07 16:18:46,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:46,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111564788] [2021-10-07 16:18:46,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:18:46,928 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:46,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:46,930 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:46,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-07 16:18:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:18:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:47,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:48,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:48,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:48,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111564788] [2021-10-07 16:18:48,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111564788] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:48,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:48,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:18:48,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578893087] [2021-10-07 16:18:48,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:18:48,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:48,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:18:48,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:18:48,634 INFO L87 Difference]: Start difference. First operand 5142 states and 22632 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:51,908 INFO L93 Difference]: Finished difference Result 10452 states and 44652 transitions. [2021-10-07 16:18:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 16:18:51,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:18:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:51,958 INFO L225 Difference]: With dead ends: 10452 [2021-10-07 16:18:51,958 INFO L226 Difference]: Without dead ends: 10452 [2021-10-07 16:18:51,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1884.3ms TimeCoverageRelationStatistics Valid=454, Invalid=1106, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 16:18:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10452 states. [2021-10-07 16:18:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10452 to 5408. [2021-10-07 16:18:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5408 states, 5403 states have (on average 4.456968350916157) internal successors, (24081), 5407 states have internal predecessors, (24081), 0 states have call successors, (0), 0 states 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 16:18:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 24081 transitions. [2021-10-07 16:18:52,201 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 24081 transitions. Word has length 22 [2021-10-07 16:18:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:52,202 INFO L470 AbstractCegarLoop]: Abstraction has 5408 states and 24081 transitions. [2021-10-07 16:18:52,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:18:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 24081 transitions. [2021-10-07 16:18:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:52,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:52,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:52,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:52,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:52,416 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash -178869963, now seen corresponding path program 22 times [2021-10-07 16:18:52,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:52,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063717932] [2021-10-07 16:18:52,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:18:52,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:52,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:52,420 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:52,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-07 16:18:53,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:18:53,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:18:53,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:53,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:54,042 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:54,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063717932] [2021-10-07 16:18:54,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063717932] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:54,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:54,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:18:54,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464209398] [2021-10-07 16:18:54,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:18:54,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:18:54,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:18:54,045 INFO L87 Difference]: Start difference. First operand 5408 states and 24081 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:57,237 INFO L93 Difference]: Finished difference Result 10346 states and 44291 transitions. [2021-10-07 16:18:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 16:18:57,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 22 [2021-10-07 16:18:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:57,272 INFO L225 Difference]: With dead ends: 10346 [2021-10-07 16:18:57,272 INFO L226 Difference]: Without dead ends: 10346 [2021-10-07 16:18:57,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1788.9ms TimeCoverageRelationStatistics Valid=434, Invalid=1126, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 16:18:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10346 states. [2021-10-07 16:18:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10346 to 5294. [2021-10-07 16:18:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5294 states, 5289 states have (on average 4.4235205142749106) internal successors, (23396), 5293 states have internal predecessors, (23396), 0 states have call successors, (0), 0 states 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 16:18:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 23396 transitions. [2021-10-07 16:18:57,507 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 23396 transitions. Word has length 22 [2021-10-07 16:18:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:57,507 INFO L470 AbstractCegarLoop]: Abstraction has 5294 states and 23396 transitions. [2021-10-07 16:18:57,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 23396 transitions. [2021-10-07 16:18:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:18:57,513 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:57,513 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:57,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:57,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:57,714 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:18:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1574991741, now seen corresponding path program 23 times [2021-10-07 16:18:57,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:57,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117335841] [2021-10-07 16:18:57,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:18:57,717 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:57,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:57,718 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:57,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-07 16:18:58,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:18:58,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:18:58,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:59,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:59,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:59,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117335841] [2021-10-07 16:18:59,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117335841] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:59,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:59,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-10-07 16:18:59,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028995209] [2021-10-07 16:18:59,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 16:18:59,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:59,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 16:18:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:18:59,398 INFO L87 Difference]: Start difference. First operand 5294 states and 23396 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:02,167 INFO L93 Difference]: Finished difference Result 9170 states and 39525 transitions. [2021-10-07 16:19:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 16:19:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 22 [2021-10-07 16:19:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:02,198 INFO L225 Difference]: With dead ends: 9170 [2021-10-07 16:19:02,198 INFO L226 Difference]: Without dead ends: 9170 [2021-10-07 16:19:02,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1607.7ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-10-07 16:19:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2021-10-07 16:19:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 5362. [2021-10-07 16:19:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5362 states, 5357 states have (on average 4.416277767407131) internal successors, (23658), 5361 states have internal predecessors, (23658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5362 states to 5362 states and 23658 transitions. [2021-10-07 16:19:02,412 INFO L78 Accepts]: Start accepts. Automaton has 5362 states and 23658 transitions. Word has length 22 [2021-10-07 16:19:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:02,412 INFO L470 AbstractCegarLoop]: Abstraction has 5362 states and 23658 transitions. [2021-10-07 16:19:02,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5362 states and 23658 transitions. [2021-10-07 16:19:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:02,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:02,419 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:02,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:02,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:02,626 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:02,627 INFO L82 PathProgramCache]: Analyzing trace with hash -222469205, now seen corresponding path program 24 times [2021-10-07 16:19:02,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:02,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673770201] [2021-10-07 16:19:02,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:19:02,628 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:02,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:02,629 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:02,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-07 16:19:03,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:19:03,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:03,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:03,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:04,407 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:04,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673770201] [2021-10-07 16:19:04,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673770201] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:04,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:04,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:19:04,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549231296] [2021-10-07 16:19:04,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:19:04,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:19:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:04,409 INFO L87 Difference]: Start difference. First operand 5362 states and 23658 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:07,222 INFO L93 Difference]: Finished difference Result 7546 states and 31397 transitions. [2021-10-07 16:19:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:19:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:19:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:07,246 INFO L225 Difference]: With dead ends: 7546 [2021-10-07 16:19:07,247 INFO L226 Difference]: Without dead ends: 7546 [2021-10-07 16:19:07,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1788.3ms TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 16:19:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7546 states. [2021-10-07 16:19:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7546 to 5400. [2021-10-07 16:19:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5400 states, 5395 states have (on average 4.421686746987952) internal successors, (23855), 5399 states have internal predecessors, (23855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 23855 transitions. [2021-10-07 16:19:07,447 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 23855 transitions. Word has length 22 [2021-10-07 16:19:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:07,447 INFO L470 AbstractCegarLoop]: Abstraction has 5400 states and 23855 transitions. [2021-10-07 16:19:07,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 23855 transitions. [2021-10-07 16:19:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:07,454 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:07,454 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:07,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:07,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:07,655 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:07,656 INFO L82 PathProgramCache]: Analyzing trace with hash -292823217, now seen corresponding path program 25 times [2021-10-07 16:19:07,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:07,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518665469] [2021-10-07 16:19:07,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:19:07,658 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:07,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:07,661 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:07,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-10-07 16:19:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:08,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:08,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:08,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:09,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:09,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518665469] [2021-10-07 16:19:09,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518665469] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:19:09,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:19:09,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:19:09,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505856027] [2021-10-07 16:19:09,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:19:09,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:19:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:19:09,316 INFO L87 Difference]: Start difference. First operand 5400 states and 23855 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:09,784 INFO L93 Difference]: Finished difference Result 5646 states and 24686 transitions. [2021-10-07 16:19:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:19:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:19:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:09,803 INFO L225 Difference]: With dead ends: 5646 [2021-10-07 16:19:09,803 INFO L226 Difference]: Without dead ends: 5634 [2021-10-07 16:19:09,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 455.1ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:19:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-10-07 16:19:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 5388. [2021-10-07 16:19:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5388 states, 5383 states have (on average 4.423741408136727) internal successors, (23813), 5387 states have internal predecessors, (23813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 23813 transitions. [2021-10-07 16:19:09,919 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 23813 transitions. Word has length 22 [2021-10-07 16:19:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:09,919 INFO L470 AbstractCegarLoop]: Abstraction has 5388 states and 23813 transitions. [2021-10-07 16:19:09,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 23813 transitions. [2021-10-07 16:19:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:09,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:09,926 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:09,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:10,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:10,127 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:10,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1290303033, now seen corresponding path program 26 times [2021-10-07 16:19:10,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:10,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88713477] [2021-10-07 16:19:10,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:19:10,129 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:10,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:10,130 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:10,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-10-07 16:19:11,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:19:11,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:11,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:11,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:12,001 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:12,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88713477] [2021-10-07 16:19:12,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88713477] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:12,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:12,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:19:12,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142191284] [2021-10-07 16:19:12,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:19:12,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:12,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:19:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:12,003 INFO L87 Difference]: Start difference. First operand 5388 states and 23813 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:15,770 INFO L93 Difference]: Finished difference Result 8564 states and 35404 transitions. [2021-10-07 16:19:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 16:19:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:19:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:15,797 INFO L225 Difference]: With dead ends: 8564 [2021-10-07 16:19:15,798 INFO L226 Difference]: Without dead ends: 8564 [2021-10-07 16:19:15,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2523.3ms TimeCoverageRelationStatistics Valid=399, Invalid=1007, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 16:19:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8564 states. [2021-10-07 16:19:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8564 to 5436. [2021-10-07 16:19:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5436 states, 5431 states have (on average 4.43288528816056) internal successors, (24075), 5435 states have internal predecessors, (24075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5436 states to 5436 states and 24075 transitions. [2021-10-07 16:19:15,954 INFO L78 Accepts]: Start accepts. Automaton has 5436 states and 24075 transitions. Word has length 22 [2021-10-07 16:19:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:15,955 INFO L470 AbstractCegarLoop]: Abstraction has 5436 states and 24075 transitions. [2021-10-07 16:19:15,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 5436 states and 24075 transitions. [2021-10-07 16:19:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:15,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:15,961 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:15,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:16,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:16,162 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash -306192717, now seen corresponding path program 27 times [2021-10-07 16:19:16,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:16,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150798554] [2021-10-07 16:19:16,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:19:16,164 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:16,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:16,165 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:16,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-07 16:19:17,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:19:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:17,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:18,044 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:18,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150798554] [2021-10-07 16:19:18,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150798554] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:18,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:18,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:19:18,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836431043] [2021-10-07 16:19:18,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:19:18,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:18,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:19:18,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:18,046 INFO L87 Difference]: Start difference. First operand 5436 states and 24075 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:20,867 INFO L93 Difference]: Finished difference Result 8414 states and 35123 transitions. [2021-10-07 16:19:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 16:19:20,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 22 [2021-10-07 16:19:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:20,895 INFO L225 Difference]: With dead ends: 8414 [2021-10-07 16:19:20,895 INFO L226 Difference]: Without dead ends: 8414 [2021-10-07 16:19:20,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1468.7ms TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 16:19:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2021-10-07 16:19:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 5466. [2021-10-07 16:19:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5461 states have (on average 4.4504669474455225) internal successors, (24304), 5465 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 24304 transitions. [2021-10-07 16:19:21,055 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 24304 transitions. Word has length 22 [2021-10-07 16:19:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:21,055 INFO L470 AbstractCegarLoop]: Abstraction has 5466 states and 24304 transitions. [2021-10-07 16:19:21,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 24304 transitions. [2021-10-07 16:19:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:21,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:21,062 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:21,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:21,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:21,263 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:21,264 INFO L82 PathProgramCache]: Analyzing trace with hash 775010611, now seen corresponding path program 28 times [2021-10-07 16:19:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:21,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062640486] [2021-10-07 16:19:21,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:19:21,265 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:21,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:21,266 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-10-07 16:19:22,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:19:22,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:22,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:22,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:22,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:23,006 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:23,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062640486] [2021-10-07 16:19:23,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062640486] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:19:23,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:19:23,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:19:23,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908868419] [2021-10-07 16:19:23,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:19:23,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:23,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:19:23,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:19:23,008 INFO L87 Difference]: Start difference. First operand 5466 states and 24304 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:23,470 INFO L93 Difference]: Finished difference Result 5712 states and 25147 transitions. [2021-10-07 16:19:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:19:23,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:19:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:23,490 INFO L225 Difference]: With dead ends: 5712 [2021-10-07 16:19:23,490 INFO L226 Difference]: Without dead ends: 5700 [2021-10-07 16:19:23,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:19:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2021-10-07 16:19:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 5480. [2021-10-07 16:19:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5475 states have (on average 4.445479452054794) internal successors, (24339), 5479 states have internal predecessors, (24339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 24339 transitions. [2021-10-07 16:19:23,622 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 24339 transitions. Word has length 22 [2021-10-07 16:19:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:23,622 INFO L470 AbstractCegarLoop]: Abstraction has 5480 states and 24339 transitions. [2021-10-07 16:19:23,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 24339 transitions. [2021-10-07 16:19:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:23,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:23,629 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:23,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:23,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:23,843 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:23,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1294753687, now seen corresponding path program 29 times [2021-10-07 16:19:23,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:23,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166501264] [2021-10-07 16:19:23,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:19:23,845 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:23,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:23,847 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:23,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-10-07 16:19:24,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:19:24,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:19:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:25,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:25,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:25,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166501264] [2021-10-07 16:19:25,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166501264] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:25,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:25,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:19:25,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854410925] [2021-10-07 16:19:25,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:19:25,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:25,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:19:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:25,742 INFO L87 Difference]: Start difference. First operand 5480 states and 24339 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:28,802 INFO L93 Difference]: Finished difference Result 9572 states and 40410 transitions. [2021-10-07 16:19:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 16:19:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:19:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:28,834 INFO L225 Difference]: With dead ends: 9572 [2021-10-07 16:19:28,834 INFO L226 Difference]: Without dead ends: 9568 [2021-10-07 16:19:28,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1901.2ms TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:19:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9568 states. [2021-10-07 16:19:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9568 to 5538. [2021-10-07 16:19:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5538 states, 5533 states have (on average 4.439906018434845) internal successors, (24566), 5537 states have internal predecessors, (24566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 24566 transitions. [2021-10-07 16:19:28,998 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 24566 transitions. Word has length 22 [2021-10-07 16:19:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:28,998 INFO L470 AbstractCegarLoop]: Abstraction has 5538 states and 24566 transitions. [2021-10-07 16:19:28,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 24566 transitions. [2021-10-07 16:19:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:29,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:29,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:29,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:29,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:29,212 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash -950555051, now seen corresponding path program 30 times [2021-10-07 16:19:29,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:29,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649292943] [2021-10-07 16:19:29,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:19:29,214 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:29,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:29,215 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:29,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-10-07 16:19:30,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:19:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:30,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:30,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:30,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:30,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649292943] [2021-10-07 16:19:30,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649292943] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:30,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:30,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:19:30,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524035406] [2021-10-07 16:19:30,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:19:30,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:30,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:19:30,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:30,919 INFO L87 Difference]: Start difference. First operand 5538 states and 24566 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:33,212 INFO L93 Difference]: Finished difference Result 9214 states and 39160 transitions. [2021-10-07 16:19:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:19:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:19:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:33,243 INFO L225 Difference]: With dead ends: 9214 [2021-10-07 16:19:33,243 INFO L226 Difference]: Without dead ends: 9214 [2021-10-07 16:19:33,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1336.7ms TimeCoverageRelationStatistics Valid=363, Invalid=897, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:19:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2021-10-07 16:19:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 5576. [2021-10-07 16:19:33,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 5571 states have (on average 4.438520911865015) internal successors, (24727), 5575 states have internal predecessors, (24727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 24727 transitions. [2021-10-07 16:19:33,400 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 24727 transitions. Word has length 22 [2021-10-07 16:19:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:33,401 INFO L470 AbstractCegarLoop]: Abstraction has 5576 states and 24727 transitions. [2021-10-07 16:19:33,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 24727 transitions. [2021-10-07 16:19:33,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:33,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:33,408 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:33,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:33,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:33,609 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1020909063, now seen corresponding path program 31 times [2021-10-07 16:19:33,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:33,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874012809] [2021-10-07 16:19:33,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:19:33,611 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:33,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:33,612 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:33,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-10-07 16:19:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:34,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:34,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:35,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:35,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874012809] [2021-10-07 16:19:35,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874012809] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:19:35,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:19:35,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:19:35,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459519978] [2021-10-07 16:19:35,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:19:35,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:35,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:19:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:19:35,155 INFO L87 Difference]: Start difference. First operand 5576 states and 24727 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:35,658 INFO L93 Difference]: Finished difference Result 7924 states and 35182 transitions. [2021-10-07 16:19:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:19:35,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:19:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:35,685 INFO L225 Difference]: With dead ends: 7924 [2021-10-07 16:19:35,685 INFO L226 Difference]: Without dead ends: 7912 [2021-10-07 16:19:35,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:19:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7912 states. [2021-10-07 16:19:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7912 to 5564. [2021-10-07 16:19:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5564 states, 5559 states have (on average 4.440546860946213) internal successors, (24685), 5563 states have internal predecessors, (24685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5564 states to 5564 states and 24685 transitions. [2021-10-07 16:19:35,895 INFO L78 Accepts]: Start accepts. Automaton has 5564 states and 24685 transitions. Word has length 22 [2021-10-07 16:19:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:35,895 INFO L470 AbstractCegarLoop]: Abstraction has 5564 states and 24685 transitions. [2021-10-07 16:19:35,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 5564 states and 24685 transitions. [2021-10-07 16:19:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:35,903 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:35,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:35,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:36,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:36,104 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:36,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:36,105 INFO L82 PathProgramCache]: Analyzing trace with hash 637295863, now seen corresponding path program 32 times [2021-10-07 16:19:36,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:36,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292931217] [2021-10-07 16:19:36,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:19:36,107 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:36,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:36,108 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:36,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-10-07 16:19:37,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:19:37,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:37,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:37,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:37,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:37,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292931217] [2021-10-07 16:19:37,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292931217] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:19:37,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:19:37,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:19:37,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839862188] [2021-10-07 16:19:37,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:19:37,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:37,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:19:37,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:19:37,728 INFO L87 Difference]: Start difference. First operand 5564 states and 24685 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:38,245 INFO L93 Difference]: Finished difference Result 7972 states and 35261 transitions. [2021-10-07 16:19:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:19:38,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:19:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:38,273 INFO L225 Difference]: With dead ends: 7972 [2021-10-07 16:19:38,273 INFO L226 Difference]: Without dead ends: 7948 [2021-10-07 16:19:38,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:19:38,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-10-07 16:19:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 5552. [2021-10-07 16:19:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5547 states have (on average 4.442581575626464) internal successors, (24643), 5551 states have internal predecessors, (24643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 24643 transitions. [2021-10-07 16:19:38,423 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 24643 transitions. Word has length 22 [2021-10-07 16:19:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:38,423 INFO L470 AbstractCegarLoop]: Abstraction has 5552 states and 24643 transitions. [2021-10-07 16:19:38,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 24643 transitions. [2021-10-07 16:19:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:38,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:38,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:38,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-10-07 16:19:38,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:38,668 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2072189905, now seen corresponding path program 33 times [2021-10-07 16:19:38,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:38,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667937287] [2021-10-07 16:19:38,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:19:38,670 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:38,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:38,671 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:38,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-10-07 16:19:39,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:19:39,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:40,551 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:40,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667937287] [2021-10-07 16:19:40,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667937287] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:40,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:40,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:19:40,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523618194] [2021-10-07 16:19:40,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:19:40,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:19:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:40,554 INFO L87 Difference]: Start difference. First operand 5552 states and 24643 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:43,681 INFO L93 Difference]: Finished difference Result 9934 states and 41836 transitions. [2021-10-07 16:19:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 16:19:43,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:19:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:43,713 INFO L225 Difference]: With dead ends: 9934 [2021-10-07 16:19:43,713 INFO L226 Difference]: Without dead ends: 9934 [2021-10-07 16:19:43,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1868.0ms TimeCoverageRelationStatistics Valid=394, Invalid=1012, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 16:19:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9934 states. [2021-10-07 16:19:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9934 to 5590. [2021-10-07 16:19:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 5585 states have (on average 4.44762757385855) internal successors, (24840), 5589 states have internal predecessors, (24840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 24840 transitions. [2021-10-07 16:19:43,887 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 24840 transitions. Word has length 22 [2021-10-07 16:19:43,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:43,887 INFO L470 AbstractCegarLoop]: Abstraction has 5590 states and 24840 transitions. [2021-10-07 16:19:43,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:43,888 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 24840 transitions. [2021-10-07 16:19:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:43,895 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:43,895 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:43,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:44,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:44,110 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2142543917, now seen corresponding path program 34 times [2021-10-07 16:19:44,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:44,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918414609] [2021-10-07 16:19:44,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:19:44,112 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:44,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:44,113 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:44,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-10-07 16:19:45,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:19:45,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:45,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:45,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:45,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:45,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918414609] [2021-10-07 16:19:45,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918414609] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:19:45,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:19:45,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:19:45,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769168979] [2021-10-07 16:19:45,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:19:45,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:19:45,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:19:45,799 INFO L87 Difference]: Start difference. First operand 5590 states and 24840 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:46,273 INFO L93 Difference]: Finished difference Result 8012 states and 35502 transitions. [2021-10-07 16:19:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:19:46,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:19:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:46,300 INFO L225 Difference]: With dead ends: 8012 [2021-10-07 16:19:46,301 INFO L226 Difference]: Without dead ends: 8000 [2021-10-07 16:19:46,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:19:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8000 states. [2021-10-07 16:19:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8000 to 5578. [2021-10-07 16:19:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5578 states, 5573 states have (on average 4.449668042347031) internal successors, (24798), 5577 states have internal predecessors, (24798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 24798 transitions. [2021-10-07 16:19:46,448 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 24798 transitions. Word has length 22 [2021-10-07 16:19:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:46,448 INFO L470 AbstractCegarLoop]: Abstraction has 5578 states and 24798 transitions. [2021-10-07 16:19:46,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:19:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 24798 transitions. [2021-10-07 16:19:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:46,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:46,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:46,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:46,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:46,656 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1154943563, now seen corresponding path program 35 times [2021-10-07 16:19:46,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:46,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269489998] [2021-10-07 16:19:46,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:19:46,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:46,660 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:46,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-10-07 16:19:47,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:19:47,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:47,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:19:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:48,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:48,647 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:48,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269489998] [2021-10-07 16:19:48,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269489998] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:48,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:48,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-10-07 16:19:48,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118308659] [2021-10-07 16:19:48,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 16:19:48,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 16:19:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:19:48,649 INFO L87 Difference]: Start difference. First operand 5578 states and 24798 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:52,892 INFO L93 Difference]: Finished difference Result 10710 states and 44472 transitions. [2021-10-07 16:19:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 16:19:52,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 16:19:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:52,940 INFO L225 Difference]: With dead ends: 10710 [2021-10-07 16:19:52,940 INFO L226 Difference]: Without dead ends: 10710 [2021-10-07 16:19:52,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 3056.6ms TimeCoverageRelationStatistics Valid=610, Invalid=1282, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 16:19:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-10-07 16:19:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 5614. [2021-10-07 16:19:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5614 states, 5609 states have (on average 4.453556783740417) internal successors, (24980), 5613 states have internal predecessors, (24980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 24980 transitions. [2021-10-07 16:19:53,141 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 24980 transitions. Word has length 22 [2021-10-07 16:19:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:53,142 INFO L470 AbstractCegarLoop]: Abstraction has 5614 states and 24980 transitions. [2021-10-07 16:19:53,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 24980 transitions. [2021-10-07 16:19:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:53,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:53,149 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:53,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:53,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:53,350 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2139053879, now seen corresponding path program 36 times [2021-10-07 16:19:53,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:53,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040760126] [2021-10-07 16:19:53,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:19:53,352 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:53,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:53,354 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:53,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-10-07 16:19:54,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:19:54,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:54,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:54,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:55,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:55,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040760126] [2021-10-07 16:19:55,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040760126] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:55,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:55,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:19:55,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093523659] [2021-10-07 16:19:55,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:19:55,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:19:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:55,296 INFO L87 Difference]: Start difference. First operand 5614 states and 24980 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:57,566 INFO L93 Difference]: Finished difference Result 9948 states and 41726 transitions. [2021-10-07 16:19:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 16:19:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 22 [2021-10-07 16:19:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:57,599 INFO L225 Difference]: With dead ends: 9948 [2021-10-07 16:19:57,599 INFO L226 Difference]: Without dead ends: 9948 [2021-10-07 16:19:57,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1213.6ms TimeCoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 16:19:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9948 states. [2021-10-07 16:19:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9948 to 5604. [2021-10-07 16:19:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5599 states have (on average 4.449544561528844) internal successors, (24913), 5603 states have internal predecessors, (24913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 24913 transitions. [2021-10-07 16:19:57,776 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 24913 transitions. Word has length 22 [2021-10-07 16:19:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:57,776 INFO L470 AbstractCegarLoop]: Abstraction has 5604 states and 24913 transitions. [2021-10-07 16:19:57,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 24913 transitions. [2021-10-07 16:19:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:19:57,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:57,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:57,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:58,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:58,001 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:19:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1074710089, now seen corresponding path program 37 times [2021-10-07 16:19:58,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:58,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216276641] [2021-10-07 16:19:58,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:19:58,003 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:58,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:58,004 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:58,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-10-07 16:19:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:19:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:59,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:59,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:59,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216276641] [2021-10-07 16:19:59,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216276641] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:19:59,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:19:59,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:19:59,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536164643] [2021-10-07 16:19:59,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:19:59,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:59,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:19:59,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:19:59,784 INFO L87 Difference]: Start difference. First operand 5604 states and 24913 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:20:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:00,350 INFO L93 Difference]: Finished difference Result 7824 states and 34529 transitions. [2021-10-07 16:20:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:20:00,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:20:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:00,377 INFO L225 Difference]: With dead ends: 7824 [2021-10-07 16:20:00,377 INFO L226 Difference]: Without dead ends: 7812 [2021-10-07 16:20:00,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:20:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7812 states. [2021-10-07 16:20:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7812 to 5618. [2021-10-07 16:20:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5613 states have (on average 4.444681988241582) internal successors, (24948), 5617 states have internal predecessors, (24948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 24948 transitions. [2021-10-07 16:20:00,523 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 24948 transitions. Word has length 22 [2021-10-07 16:20:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:00,524 INFO L470 AbstractCegarLoop]: Abstraction has 5618 states and 24948 transitions. [2021-10-07 16:20:00,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:20:00,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 24948 transitions. [2021-10-07 16:20:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:20:00,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:00,531 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:00,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:00,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:00,732 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:20:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:00,732 INFO L82 PathProgramCache]: Analyzing trace with hash -554967013, now seen corresponding path program 38 times [2021-10-07 16:20:00,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:00,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663746045] [2021-10-07 16:20:00,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:20:00,734 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:00,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:00,736 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:00,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-10-07 16:20:01,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:20:01,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:20:01,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:02,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:02,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:02,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663746045] [2021-10-07 16:20:02,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663746045] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:20:02,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:20:02,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:20:02,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796004134] [2021-10-07 16:20:02,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:20:02,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:02,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:20:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:20:02,657 INFO L87 Difference]: Start difference. First operand 5618 states and 24948 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:20:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:03,361 INFO L93 Difference]: Finished difference Result 7850 states and 34598 transitions. [2021-10-07 16:20:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:20:03,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:20:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:03,387 INFO L225 Difference]: With dead ends: 7850 [2021-10-07 16:20:03,388 INFO L226 Difference]: Without dead ends: 7850 [2021-10-07 16:20:03,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:20:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7850 states. [2021-10-07 16:20:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7850 to 5626. [2021-10-07 16:20:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5621 states have (on average 4.442981675858388) internal successors, (24974), 5625 states have internal predecessors, (24974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 24974 transitions. [2021-10-07 16:20:03,530 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 24974 transitions. Word has length 22 [2021-10-07 16:20:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:03,530 INFO L470 AbstractCegarLoop]: Abstraction has 5626 states and 24974 transitions. [2021-10-07 16:20:03,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:20:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 24974 transitions. [2021-10-07 16:20:03,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:20:03,537 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:03,537 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:03,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:03,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:03,738 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:20:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash -619593837, now seen corresponding path program 39 times [2021-10-07 16:20:03,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:03,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603741269] [2021-10-07 16:20:03,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:20:03,740 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:03,742 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:03,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-10-07 16:20:04,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:20:04,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:04,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:20:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:05,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:05,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:05,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603741269] [2021-10-07 16:20:05,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603741269] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:20:05,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:20:05,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:20:05,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930200596] [2021-10-07 16:20:05,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:20:05,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:20:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:20:05,486 INFO L87 Difference]: Start difference. First operand 5626 states and 24974 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:20:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:06,027 INFO L93 Difference]: Finished difference Result 7896 states and 34757 transitions. [2021-10-07 16:20:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:20:06,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:20:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:06,054 INFO L225 Difference]: With dead ends: 7896 [2021-10-07 16:20:06,054 INFO L226 Difference]: Without dead ends: 7872 [2021-10-07 16:20:06,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:20:06,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7872 states. [2021-10-07 16:20:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7872 to 5640. [2021-10-07 16:20:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5640 states, 5635 states have (on average 4.4381543921916595) internal successors, (25009), 5639 states have internal predecessors, (25009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 25009 transitions. [2021-10-07 16:20:06,259 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 25009 transitions. Word has length 22 [2021-10-07 16:20:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:06,259 INFO L470 AbstractCegarLoop]: Abstraction has 5640 states and 25009 transitions. [2021-10-07 16:20:06,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:20:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 25009 transitions. [2021-10-07 16:20:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:20:06,266 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:06,267 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:06,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:06,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:06,468 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:20:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1209964935, now seen corresponding path program 40 times [2021-10-07 16:20:06,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:06,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349326923] [2021-10-07 16:20:06,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:20:06,470 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:06,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:06,471 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:06,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-10-07 16:20:07,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:20:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:07,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:20:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:07,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:08,224 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:08,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349326923] [2021-10-07 16:20:08,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349326923] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:20:08,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:20:08,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-07 16:20:08,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937339916] [2021-10-07 16:20:08,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:20:08,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:20:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:20:08,226 INFO L87 Difference]: Start difference. First operand 5640 states and 25009 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:20:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:08,929 INFO L93 Difference]: Finished difference Result 7898 states and 34774 transitions. [2021-10-07 16:20:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:20:08,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-07 16:20:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:08,956 INFO L225 Difference]: With dead ends: 7898 [2021-10-07 16:20:08,957 INFO L226 Difference]: Without dead ends: 7886 [2021-10-07 16:20:08,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 538.5ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:20:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7886 states. [2021-10-07 16:20:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7886 to 5654. [2021-10-07 16:20:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5649 states have (on average 4.433351035581519) internal successors, (25044), 5653 states have internal predecessors, (25044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 25044 transitions. [2021-10-07 16:20:09,210 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 25044 transitions. Word has length 22 [2021-10-07 16:20:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:09,211 INFO L470 AbstractCegarLoop]: Abstraction has 5654 states and 25044 transitions. [2021-10-07 16:20:09,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 16:20:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 25044 transitions. [2021-10-07 16:20:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:20:09,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:09,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:09,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:09,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:09,433 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:20:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:09,434 INFO L82 PathProgramCache]: Analyzing trace with hash -690221859, now seen corresponding path program 41 times [2021-10-07 16:20:09,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:09,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443515015] [2021-10-07 16:20:09,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:20:09,435 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:09,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:09,436 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:09,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-10-07 16:20:10,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:20:10,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:10,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:20:10,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:11,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:11,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:11,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443515015] [2021-10-07 16:20:11,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443515015] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:11,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:11,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-07 16:20:11,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257316163] [2021-10-07 16:20:11,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:20:11,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:20:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:20:11,415 INFO L87 Difference]: Start difference. First operand 5654 states and 25044 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:14,878 INFO L93 Difference]: Finished difference Result 9120 states and 38595 transitions. [2021-10-07 16:20:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 16:20:14,879 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 16:20:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:14,908 INFO L225 Difference]: With dead ends: 9120 [2021-10-07 16:20:14,909 INFO L226 Difference]: Without dead ends: 9118 [2021-10-07 16:20:14,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2233.7ms TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 16:20:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9118 states. [2021-10-07 16:20:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9118 to 5332. [2021-10-07 16:20:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5327 states have (on average 4.3962830861648206) internal successors, (23419), 5331 states have internal predecessors, (23419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 23419 transitions. [2021-10-07 16:20:15,158 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 23419 transitions. Word has length 22 [2021-10-07 16:20:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:15,159 INFO L470 AbstractCegarLoop]: Abstraction has 5332 states and 23419 transitions. [2021-10-07 16:20:15,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 23419 transitions. [2021-10-07 16:20:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:20:15,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:15,165 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:15,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:15,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:15,373 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:20:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1783143232, now seen corresponding path program 6 times [2021-10-07 16:20:15,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:15,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520193836] [2021-10-07 16:20:15,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:20:15,375 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:15,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:15,377 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:15,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-10-07 16:20:16,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:20:16,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:17,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-07 16:20:17,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:17,278 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:17,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:20:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:18,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:24,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:24,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520193836] [2021-10-07 16:20:24,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520193836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:24,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:24,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2021-10-07 16:20:24,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958242092] [2021-10-07 16:20:24,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 16:20:24,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:24,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 16:20:24,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:20:24,493 INFO L87 Difference]: Start difference. First operand 5332 states and 23419 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 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 16:20:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:57,618 INFO L93 Difference]: Finished difference Result 13055 states and 52794 transitions. [2021-10-07 16:20:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-07 16:20:57,620 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 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 16:20:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:57,663 INFO L225 Difference]: With dead ends: 13055 [2021-10-07 16:20:57,663 INFO L226 Difference]: Without dead ends: 13055 [2021-10-07 16:20:57,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 20242.0ms TimeCoverageRelationStatistics Valid=1249, Invalid=5393, Unknown=0, NotChecked=0, Total=6642 [2021-10-07 16:20:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13055 states. [2021-10-07 16:20:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13055 to 6987. [2021-10-07 16:20:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6987 states, 6982 states have (on average 4.537238613577771) internal successors, (31679), 6986 states have internal predecessors, (31679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6987 states to 6987 states and 31679 transitions. [2021-10-07 16:20:57,935 INFO L78 Accepts]: Start accepts. Automaton has 6987 states and 31679 transitions. Word has length 22 [2021-10-07 16:20:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:57,935 INFO L470 AbstractCegarLoop]: Abstraction has 6987 states and 31679 transitions. [2021-10-07 16:20:57,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 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 16:20:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 6987 states and 31679 transitions. [2021-10-07 16:20:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:20:57,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:57,943 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, 1] [2021-10-07 16:20:57,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:58,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:58,144 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:20:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1129648915, now seen corresponding path program 1 times [2021-10-07 16:20:58,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:58,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322017979] [2021-10-07 16:20:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:20:58,146 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:58,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:58,147 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:58,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-10-07 16:20:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:20:59,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-07 16:20:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:59,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-10-07 16:21:00,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:00,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:00,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:00,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:00,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:00,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:00,329 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-07 16:21:00,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 66 treesize of output 86 [2021-10-07 16:21:07,177 INFO L354 Elim1Store]: treesize reduction 816, result has 1.6 percent of original size [2021-10-07 16:21:07,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 60 [2021-10-07 16:21:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:21:07,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:21:13,933 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-07 16:21:13,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1575160379874 treesize of output 936283994642 Received shutdown request... [2021-10-07 16:25:08,267 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:25:08,267 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 16:25:08,296 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:25:08,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-10-07 16:25:08,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:25:08,500 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. [2021-10-07 16:25:08,503 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:25:08,503 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:25:08,504 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:25:08,504 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:25:08,504 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:25:08,504 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:25:08,504 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:25:08,504 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:25:08,505 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:25:08,505 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:25:08,505 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:25:08,505 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:25:08,505 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:25:08,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:25:08,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:25:08,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:25:08,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:25:08,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:25:08,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:25:08,507 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:25:08,507 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:25:08,507 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:25:08,507 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:25:08,508 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:25:08,508 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:25:08,508 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:25:08,508 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:25:08,508 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:25:08,508 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:25:08,509 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:25:08,517 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:25:08,517 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:25:08,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:25:08 BasicIcfg [2021-10-07 16:25:08,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:25:08,520 INFO L168 Benchmark]: Toolchain (without parser) took 827623.81 ms. Allocated memory was 159.4 MB in the beginning and 1.0 GB in the end (delta: 890.2 MB). Free memory was 133.6 MB in the beginning and 364.8 MB in the end (delta: -231.2 MB). Peak memory consumption was 952.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:25:08,521 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:25:08,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 397.42 ms. Allocated memory is still 159.4 MB. Free memory was 133.2 MB in the beginning and 120.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:25:08,521 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.01 ms. Allocated memory is still 159.4 MB. Free memory was 119.8 MB in the beginning and 118.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:25:08,522 INFO L168 Benchmark]: Boogie Preprocessor took 92.07 ms. Allocated memory is still 159.4 MB. Free memory was 118.1 MB in the beginning and 116.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:25:08,522 INFO L168 Benchmark]: RCFGBuilder took 903.73 ms. Allocated memory is still 159.4 MB. Free memory was 116.5 MB in the beginning and 134.3 MB in the end (delta: -17.8 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2021-10-07 16:25:08,522 INFO L168 Benchmark]: TraceAbstraction took 826114.65 ms. Allocated memory was 159.4 MB in the beginning and 1.0 GB in the end (delta: 890.2 MB). Free memory was 133.8 MB in the beginning and 364.8 MB in the end (delta: -231.0 MB). Peak memory consumption was 951.8 MB. Max. memory is 8.0 GB. [2021-10-07 16:25:08,524 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 397.42 ms. Allocated memory is still 159.4 MB. Free memory was 133.2 MB in the beginning and 120.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 96.01 ms. Allocated memory is still 159.4 MB. Free memory was 119.8 MB in the beginning and 118.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 92.07 ms. Allocated memory is still 159.4 MB. Free memory was 118.1 MB in the beginning and 116.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 903.73 ms. Allocated memory is still 159.4 MB. Free memory was 116.5 MB in the beginning and 134.3 MB in the end (delta: -17.8 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 826114.65 ms. Allocated memory was 159.4 MB in the beginning and 1.0 GB in the end (delta: 890.2 MB). Free memory was 133.8 MB in the beginning and 364.8 MB in the end (delta: -231.0 MB). Peak memory consumption was 951.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 19497.8ms, 164 PlacesBefore, 55 PlacesAfterwards, 166 TransitionsBefore, 49 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 6 FixpointIterations, 87 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 161 TotalNumberOfCompositions, 3069 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2863, positive: 2833, positive conditional: 0, positive unconditional: 2833, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1586, positive: 1575, positive conditional: 0, positive unconditional: 1575, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1586, positive: 1571, positive conditional: 0, positive unconditional: 1571, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 781, positive: 37, positive conditional: 0, positive unconditional: 37, negative: 744, negative conditional: 0, negative unconditional: 744, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2863, positive: 1258, positive conditional: 0, positive unconditional: 1258, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 1586, unknown conditional: 0, unknown unconditional: 1586] , Statistics on independence cache: Total cache size (in pairs): 116, Positive cache size: 114, Positive conditional cache size: 0, Positive unconditional cache size: 114, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - 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: 88]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 197 locations, 31 error locations. Started 1 CEGAR loops. OverallTime: 825952.9ms, OverallIterations: 76, TraceHistogramMax: 14, EmptinessCheckTime: 415.7ms, AutomataDifference: 378327.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19623.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4765 SDtfs, 33753 SDslu, 33698 SDs, 0 SdLazy, 41611 SolverSat, 1916 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 153643.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3456 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 1883 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14056 ImplicationChecksByTransitivity, 262279.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6987occurred in iteration=75, InterpolantAutomatonStates: 1391, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10447.1ms AutomataMinimizationTime, 75 MinimizatonAttempts, 177055 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 699.8ms SsaConstructionTime, 9563.2ms SatisfiabilityAnalysisTime, 108714.7ms InterpolantComputationTime, 1257 NumberOfCodeBlocks, 1253 NumberOfCodeBlocksAsserted, 134 NumberOfCheckSat, 2364 ConstructedInterpolants, 123 QuantifiedInterpolants, 27308 SizeOfPredicates, 779 NumberOfNonLiveVariables, 7911 ConjunctsInSsa, 1195 ConjunctsInUnsatCore, 150 InterpolantComputations, 43 PerfectInterpolantSequences, 276/1214 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