/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-max-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:13:35,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:13:35,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:13:35,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 16:13:35,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:13:35,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:13:35,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:13:35,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:13:35,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:13:35,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:13:35,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:13:35,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:13:35,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:13:35,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:13:35,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:13:35,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:13:35,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:13:35,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:13:35,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:13:35,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:13:35,961 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 16:13:36,030 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:13:36,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:13:36,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:13:36,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:13:36,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:13:36,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:13:36,037 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:13:36,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:13:36,037 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:13:36,037 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:13:36,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:13:36,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:13:36,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:13:36,039 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:13:36,039 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:13:36,039 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:13:36,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:13:36,040 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:13:36,040 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:13:36,040 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:13:36,040 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:13:36,041 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:13:36,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:13:36,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:13:36,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:13:36,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:13:36,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:13:36,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:13:36,042 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:13:36,042 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:13:36,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:13:36,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:13:36,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:13:36,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:13:36,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:13:36,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:13:36,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:13:36,510 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:13:36,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2021-10-07 16:13:36,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c33282d4/12b70ae6065f40049895851bf603f4e3/FLAG0159756f6 [2021-10-07 16:13:37,254 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:13:37,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2021-10-07 16:13:37,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c33282d4/12b70ae6065f40049895851bf603f4e3/FLAG0159756f6 [2021-10-07 16:13:37,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c33282d4/12b70ae6065f40049895851bf603f4e3 [2021-10-07 16:13:37,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:13:37,621 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:13:37,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:13:37,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:13:37,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:13:37,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:13:37" (1/1) ... [2021-10-07 16:13:37,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ae69acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:37, skipping insertion in model container [2021-10-07 16:13:37,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:13:37" (1/1) ... [2021-10-07 16:13:37,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:13:37,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:13:37,925 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-max-array-hom.wvr.c[2574,2587] [2021-10-07 16:13:37,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:13:37,952 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:13:37,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:13:37,991 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-max-array-hom.wvr.c[2574,2587] [2021-10-07 16:13:38,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:13:38,016 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:13:38,086 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-max-array-hom.wvr.c[2574,2587] [2021-10-07 16:13:38,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:13:38,122 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:13:38,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38 WrapperNode [2021-10-07 16:13:38,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:13:38,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:13:38,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:13:38,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:13:38,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:13:38,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:13:38,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:13:38,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:13:38,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:13:38,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:13:38,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:13:38,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:13:38,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (1/1) ... [2021-10-07 16:13:38,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:13:38,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:13:38,271 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 16:13:38,291 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 16:13:38,345 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:13:38,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:13:38,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:13:38,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:13:38,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:13:38,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:13:38,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:13:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:13:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 16:13:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 16:13:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:13:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:13:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:13:38,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:13:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:13:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:13:38,353 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 16:13:39,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:13:39,852 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-07 16:13:39,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:13:39 BoogieIcfgContainer [2021-10-07 16:13:39,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:13:39,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:13:39,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:13:39,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:13:39,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:13:37" (1/3) ... [2021-10-07 16:13:39,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116e66fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:13:39, skipping insertion in model container [2021-10-07 16:13:39,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:13:38" (2/3) ... [2021-10-07 16:13:39,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116e66fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:13:39, skipping insertion in model container [2021-10-07 16:13:39,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:13:39" (3/3) ... [2021-10-07 16:13:39,865 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2021-10-07 16:13:39,872 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:13:39,872 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-07 16:13:39,872 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:13:39,908 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,909 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,909 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,909 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,910 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,910 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,910 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,910 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,910 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,910 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,911 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,911 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,911 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,911 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,912 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,912 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,912 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,912 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,912 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,912 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,913 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,913 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,913 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,913 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,914 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,914 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,914 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,914 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,915 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,915 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,915 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,915 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,915 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,916 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,916 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,916 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,917 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,917 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,917 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,917 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,917 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,918 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,918 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,918 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,918 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,918 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,919 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,919 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,919 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,920 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,920 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,920 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,920 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,920 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,921 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,921 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,921 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,921 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,921 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,922 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,922 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,922 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,922 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,922 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,923 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,923 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,923 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,923 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,924 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,924 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,924 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,924 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,925 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,925 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,925 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,925 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,925 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,926 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,926 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,926 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,926 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,927 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,927 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,927 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,927 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,927 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,928 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,928 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,928 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,928 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,928 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,929 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,929 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,929 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,929 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,929 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,930 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,930 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,930 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,930 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,931 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,931 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,934 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,934 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,935 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,935 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,935 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,935 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,937 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,938 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,938 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,938 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,938 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,939 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,941 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:13:39,949 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:13:40,002 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:13:40,010 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 16:13:40,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-07 16:13:40,030 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:13:40,042 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 172 transitions, 368 flow [2021-10-07 16:13:40,045 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 172 transitions, 368 flow [2021-10-07 16:13:40,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 368 flow [2021-10-07 16:13:40,118 INFO L129 PetriNetUnfolder]: 13/169 cut-off events. [2021-10-07 16:13:40,119 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:13:40,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 169 events. 13/169 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2021-10-07 16:13:40,134 INFO L116 LiptonReduction]: Number of co-enabled transitions 2688 [2021-10-07 16:14:06,897 INFO L131 LiptonReduction]: Checked pairs total: 3569 [2021-10-07 16:14:06,897 INFO L133 LiptonReduction]: Total number of compositions: 181 [2021-10-07 16:14:06,909 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2021-10-07 16:14:06,998 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:14:07,013 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:07,014 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:14:07,015 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash 22959, now seen corresponding path program 1 times [2021-10-07 16:14:07,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:07,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366199426] [2021-10-07 16:14:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:07,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:07,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:07,043 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 16:14:07,074 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 16:14:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:14:07,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:07,594 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:07,595 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 16:14:07,720 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 16:14:07,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:07,871 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 16:14:07,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:07,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366199426] [2021-10-07 16:14:07,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366199426] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:07,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:07,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:14:07,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636478389] [2021-10-07 16:14:07,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:07,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:07,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:07,924 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 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 16:14:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:08,535 INFO L93 Difference]: Finished difference Result 1498 states and 5133 transitions. [2021-10-07 16:14:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:14:08,538 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 16:14:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:08,576 INFO L225 Difference]: With dead ends: 1498 [2021-10-07 16:14:08,576 INFO L226 Difference]: Without dead ends: 1498 [2021-10-07 16:14:08,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-10-07 16:14:08,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 751. [2021-10-07 16:14:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 618 states have (on average 4.166666666666667) internal successors, (2575), 750 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2575 transitions. [2021-10-07 16:14:08,720 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2575 transitions. Word has length 2 [2021-10-07 16:14:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:08,721 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2575 transitions. [2021-10-07 16:14:08,721 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 16:14:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2575 transitions. [2021-10-07 16:14:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:14:08,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:08,722 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:14:08,740 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 16:14:08,930 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 16:14:08,931 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:08,932 INFO L82 PathProgramCache]: Analyzing trace with hash 23067, now seen corresponding path program 1 times [2021-10-07 16:14:08,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:08,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024579860] [2021-10-07 16:14:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:08,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:08,939 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 16:14:08,954 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 16:14:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:14:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:09,115 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 16:14:09,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:09,146 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 16:14:09,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:09,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024579860] [2021-10-07 16:14:09,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024579860] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:09,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:09,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:14:09,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617083953] [2021-10-07 16:14:09,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:09,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:09,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:09,151 INFO L87 Difference]: Start difference. First operand 751 states and 2575 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 16:14:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:09,289 INFO L93 Difference]: Finished difference Result 752 states and 2572 transitions. [2021-10-07 16:14:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:14:09,290 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 16:14:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:09,299 INFO L225 Difference]: With dead ends: 752 [2021-10-07 16:14:09,300 INFO L226 Difference]: Without dead ends: 752 [2021-10-07 16:14:09,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-10-07 16:14:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 751. [2021-10-07 16:14:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 618 states have (on average 4.1618122977346275) internal successors, (2572), 750 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2572 transitions. [2021-10-07 16:14:09,336 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2572 transitions. Word has length 2 [2021-10-07 16:14:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:09,336 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2572 transitions. [2021-10-07 16:14:09,336 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 16:14:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2572 transitions. [2021-10-07 16:14:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:14:09,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:09,337 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:14:09,352 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 16:14:09,552 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 16:14:09,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash 22957, now seen corresponding path program 1 times [2021-10-07 16:14:09,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:09,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185812375] [2021-10-07 16:14:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:09,555 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:09,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:09,556 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 16:14:09,588 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 16:14:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:09,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:14:09,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:09,872 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:14:09,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:14:10,498 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 16:14:10,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:10,503 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 16:14:10,503 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:10,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185812375] [2021-10-07 16:14:10,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185812375] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:10,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:10,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:14:10,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241616310] [2021-10-07 16:14:10,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:14:10,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:14:10,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:14:10,506 INFO L87 Difference]: Start difference. First operand 751 states and 2572 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 16:14:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:10,627 INFO L93 Difference]: Finished difference Result 750 states and 2569 transitions. [2021-10-07 16:14:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:14:10,628 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 16:14:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:10,637 INFO L225 Difference]: With dead ends: 750 [2021-10-07 16:14:10,638 INFO L226 Difference]: Without dead ends: 750 [2021-10-07 16:14:10,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:14:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-10-07 16:14:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2021-10-07 16:14:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 618 states have (on average 4.156957928802589) internal successors, (2569), 749 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2569 transitions. [2021-10-07 16:14:10,705 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2569 transitions. Word has length 2 [2021-10-07 16:14:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:10,705 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2569 transitions. [2021-10-07 16:14:10,705 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 16:14:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2569 transitions. [2021-10-07 16:14:10,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:14:10,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:10,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:14:10,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:14:10,918 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 16:14:10,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash 715142, now seen corresponding path program 1 times [2021-10-07 16:14:10,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:10,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084221819] [2021-10-07 16:14:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:10,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:10,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:10,924 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 16:14:10,928 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 16:14:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:14:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:11,291 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-07 16:14:11,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 521 treesize of output 530 [2021-10-07 16:14:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:17,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:17,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:17,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084221819] [2021-10-07 16:14:17,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084221819] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:17,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:17,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:14:17,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343852887] [2021-10-07 16:14:17,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:17,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:17,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:17,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:17,074 INFO L87 Difference]: Start difference. First operand 750 states and 2569 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:17,290 INFO L93 Difference]: Finished difference Result 624 states and 2067 transitions. [2021-10-07 16:14:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:14:17,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 16:14:17,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:17,298 INFO L225 Difference]: With dead ends: 624 [2021-10-07 16:14:17,299 INFO L226 Difference]: Without dead ends: 624 [2021-10-07 16:14:17,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-10-07 16:14:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2021-10-07 16:14:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 520 states have (on average 3.975) internal successors, (2067), 623 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2067 transitions. [2021-10-07 16:14:17,328 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2067 transitions. Word has length 3 [2021-10-07 16:14:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:17,329 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2067 transitions. [2021-10-07 16:14:17,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2067 transitions. [2021-10-07 16:14:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:14:17,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:17,330 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:14:17,344 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 16:14:17,544 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 16:14:17,544 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash 715143, now seen corresponding path program 1 times [2021-10-07 16:14:17,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:17,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961209209] [2021-10-07 16:14:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:17,548 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:17,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:17,549 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 16:14:17,554 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 16:14:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:14:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:17,961 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-07 16:14:17,961 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 67 treesize of output 105 [2021-10-07 16:14:17,977 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 16:14:17,977 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 279 treesize of output 269 [2021-10-07 16:14:19,608 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 16:14:19,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:19,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:19,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961209209] [2021-10-07 16:14:19,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961209209] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:14:19,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:14:19,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2021-10-07 16:14:19,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385136593] [2021-10-07 16:14:19,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:19,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:14:19,749 INFO L87 Difference]: Start difference. First operand 624 states and 2067 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:19,891 INFO L93 Difference]: Finished difference Result 498 states and 1565 transitions. [2021-10-07 16:14:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:14:19,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-10-07 16:14:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:19,897 INFO L225 Difference]: With dead ends: 498 [2021-10-07 16:14:19,898 INFO L226 Difference]: Without dead ends: 498 [2021-10-07 16:14:19,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:14:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-10-07 16:14:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2021-10-07 16:14:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 422 states have (on average 3.7085308056872037) internal successors, (1565), 497 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1565 transitions. [2021-10-07 16:14:19,920 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1565 transitions. Word has length 3 [2021-10-07 16:14:19,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:19,920 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1565 transitions. [2021-10-07 16:14:19,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1565 transitions. [2021-10-07 16:14:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:14:19,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:19,921 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:14:19,939 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 16:14:20,134 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 16:14:20,134 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:20,135 INFO L82 PathProgramCache]: Analyzing trace with hash 22169359, now seen corresponding path program 1 times [2021-10-07 16:14:20,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:20,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135242810] [2021-10-07 16:14:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:20,136 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:20,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:20,137 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 16:14:20,172 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 16:14:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:20,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:14:20,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:20,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:20,524 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:20,525 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 16:14:20,670 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 16:14:20,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:21,244 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 16:14:21,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:21,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135242810] [2021-10-07 16:14:21,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135242810] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:21,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:21,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:14:21,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673853767] [2021-10-07 16:14:21,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:14:21,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:21,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:14:21,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:14:21,247 INFO L87 Difference]: Start difference. First operand 498 states and 1565 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 16:14:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:23,139 INFO L93 Difference]: Finished difference Result 2474 states and 7805 transitions. [2021-10-07 16:14:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:14:23,141 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 16:14:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:23,162 INFO L225 Difference]: With dead ends: 2474 [2021-10-07 16:14:23,162 INFO L226 Difference]: Without dead ends: 2474 [2021-10-07 16:14:23,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 853.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:14:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-10-07 16:14:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 502. [2021-10-07 16:14:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 426 states have (on average 3.692488262910798) internal successors, (1573), 501 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1573 transitions. [2021-10-07 16:14:23,219 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1573 transitions. Word has length 4 [2021-10-07 16:14:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:23,220 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1573 transitions. [2021-10-07 16:14:23,220 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 16:14:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1573 transitions. [2021-10-07 16:14:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:14:23,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:23,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:14:23,235 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 16:14:23,434 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 16:14:23,435 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:23,436 INFO L82 PathProgramCache]: Analyzing trace with hash 687266745, now seen corresponding path program 1 times [2021-10-07 16:14:23,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:23,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902578069] [2021-10-07 16:14:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:23,437 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:23,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:23,438 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 16:14:23,441 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 16:14:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:14:23,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:23,752 INFO L354 Elim1Store]: treesize reduction 235, result has 20.6 percent of original size [2021-10-07 16:14:23,752 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 48 treesize of output 92 [2021-10-07 16:14:23,765 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 233 treesize of output 225 [2021-10-07 16:14:29,104 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 16:14:29,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:29,301 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 16:14:29,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:29,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902578069] [2021-10-07 16:14:29,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902578069] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:29,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:29,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:14:29,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811684341] [2021-10-07 16:14:29,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:14:29,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:29,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:14:29,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:14:29,304 INFO L87 Difference]: Start difference. First operand 502 states and 1573 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 16:14:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:29,816 INFO L93 Difference]: Finished difference Result 935 states and 2961 transitions. [2021-10-07 16:14:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:14:29,817 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 16:14:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:29,826 INFO L225 Difference]: With dead ends: 935 [2021-10-07 16:14:29,826 INFO L226 Difference]: Without dead ends: 935 [2021-10-07 16:14:29,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:14:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-10-07 16:14:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 472. [2021-10-07 16:14:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 408 states have (on average 3.6470588235294117) internal successors, (1488), 471 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1488 transitions. [2021-10-07 16:14:29,849 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1488 transitions. Word has length 5 [2021-10-07 16:14:29,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:29,849 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1488 transitions. [2021-10-07 16:14:29,849 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 16:14:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1488 transitions. [2021-10-07 16:14:29,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:14:29,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:29,850 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:14:29,863 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 16:14:30,063 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 16:14:30,064 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash 687266746, now seen corresponding path program 1 times [2021-10-07 16:14:30,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:30,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237993848] [2021-10-07 16:14:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:30,066 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:30,067 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 16:14:30,068 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 16:14:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:30,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:14:30,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:30,374 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:14:30,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 166 treesize of output 207 [2021-10-07 16:14:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:36,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:36,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:36,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237993848] [2021-10-07 16:14:36,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237993848] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:36,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:36,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:14:36,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191136142] [2021-10-07 16:14:36,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:36,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:36,127 INFO L87 Difference]: Start difference. First operand 472 states and 1488 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 16:14:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:36,217 INFO L93 Difference]: Finished difference Result 442 states and 1403 transitions. [2021-10-07 16:14:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:14:36,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 16:14:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:36,222 INFO L225 Difference]: With dead ends: 442 [2021-10-07 16:14:36,222 INFO L226 Difference]: Without dead ends: 442 [2021-10-07 16:14:36,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-07 16:14:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-10-07 16:14:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 390 states have (on average 3.5974358974358975) internal successors, (1403), 441 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1403 transitions. [2021-10-07 16:14:36,240 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1403 transitions. Word has length 5 [2021-10-07 16:14:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:36,240 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1403 transitions. [2021-10-07 16:14:36,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 16:14:36,241 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1403 transitions. [2021-10-07 16:14:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:14:36,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:36,241 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:14:36,254 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 16:14:36,453 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 16:14:36,454 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash -169572761, now seen corresponding path program 1 times [2021-10-07 16:14:36,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:36,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186361882] [2021-10-07 16:14:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:36,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:36,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:36,457 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 16:14:36,458 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 16:14:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:14:36,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:36,640 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 16:14:36,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:36,867 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 25 treesize of output 21 [2021-10-07 16:14:36,938 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 16:14:36,938 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:36,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186361882] [2021-10-07 16:14:36,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186361882] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:36,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:36,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:14:36,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776298489] [2021-10-07 16:14:36,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:14:36,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:14:36,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:14:36,940 INFO L87 Difference]: Start difference. First operand 442 states and 1403 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 16:14:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:37,687 INFO L93 Difference]: Finished difference Result 1451 states and 4609 transitions. [2021-10-07 16:14:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:14:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 16:14:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:37,701 INFO L225 Difference]: With dead ends: 1451 [2021-10-07 16:14:37,701 INFO L226 Difference]: Without dead ends: 1451 [2021-10-07 16:14:37,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:14:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-10-07 16:14:37,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 514. [2021-10-07 16:14:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 462 states have (on average 3.865800865800866) internal successors, (1786), 513 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1786 transitions. [2021-10-07 16:14:37,731 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1786 transitions. Word has length 6 [2021-10-07 16:14:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:37,732 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1786 transitions. [2021-10-07 16:14:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 16:14:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1786 transitions. [2021-10-07 16:14:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:14:37,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:37,732 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:14:37,745 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 16:14:37,945 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 16:14:37,945 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash -169572760, now seen corresponding path program 1 times [2021-10-07 16:14:37,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:37,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211326134] [2021-10-07 16:14:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:37,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:37,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:37,949 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 16:14:37,950 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 16:14:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:38,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:14:38,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:38,232 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:14:38,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:14:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:38,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:38,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:38,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211326134] [2021-10-07 16:14:38,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211326134] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:38,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:38,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:14:38,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722079259] [2021-10-07 16:14:38,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:38,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:38,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:38,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:38,747 INFO L87 Difference]: Start difference. First operand 514 states and 1786 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:38,855 INFO L93 Difference]: Finished difference Result 310 states and 1016 transitions. [2021-10-07 16:14:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:14:38,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:14:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:38,858 INFO L225 Difference]: With dead ends: 310 [2021-10-07 16:14:38,858 INFO L226 Difference]: Without dead ends: 310 [2021-10-07 16:14:38,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:14:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-07 16:14:38,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-10-07 16:14:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 289 states have (on average 3.5155709342560555) internal successors, (1016), 309 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1016 transitions. [2021-10-07 16:14:38,869 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1016 transitions. Word has length 6 [2021-10-07 16:14:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:38,870 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1016 transitions. [2021-10-07 16:14:38,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1016 transitions. [2021-10-07 16:14:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:14:38,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:38,871 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:14:38,887 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 16:14:39,082 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 16:14:39,083 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:39,083 INFO L82 PathProgramCache]: Analyzing trace with hash -961784061, now seen corresponding path program 1 times [2021-10-07 16:14:39,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:39,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326480226] [2021-10-07 16:14:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:39,085 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:39,086 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 16:14:39,087 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 16:14:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:39,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:14:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:39,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:39,410 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:39,410 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 16:14:39,614 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 16:14:39,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:40,019 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 16:14:40,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:40,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326480226] [2021-10-07 16:14:40,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326480226] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:40,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:40,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:14:40,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047776940] [2021-10-07 16:14:40,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:14:40,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:40,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:14:40,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:14:40,021 INFO L87 Difference]: Start difference. First operand 310 states and 1016 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:41,076 INFO L93 Difference]: Finished difference Result 560 states and 1852 transitions. [2021-10-07 16:14:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:14:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:14:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:41,082 INFO L225 Difference]: With dead ends: 560 [2021-10-07 16:14:41,082 INFO L226 Difference]: Without dead ends: 560 [2021-10-07 16:14:41,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:14:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-10-07 16:14:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 460. [2021-10-07 16:14:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 439 states have (on average 3.662870159453303) internal successors, (1608), 459 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1608 transitions. [2021-10-07 16:14:41,100 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1608 transitions. Word has length 7 [2021-10-07 16:14:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:41,100 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1608 transitions. [2021-10-07 16:14:41,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1608 transitions. [2021-10-07 16:14:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:14:41,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:41,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:14:41,116 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 16:14:41,314 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 16:14:41,314 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:41,315 INFO L82 PathProgramCache]: Analyzing trace with hash -961603340, now seen corresponding path program 1 times [2021-10-07 16:14:41,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:41,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961023224] [2021-10-07 16:14:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:41,316 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:41,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:41,317 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 16:14:41,318 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 16:14:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:14:41,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:41,698 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:41,699 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 16:14:41,952 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 16:14:41,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:42,180 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 16:14:42,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:42,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961023224] [2021-10-07 16:14:42,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961023224] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:42,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:42,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:14:42,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84378069] [2021-10-07 16:14:42,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:14:42,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:42,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:14:42,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:14:42,182 INFO L87 Difference]: Start difference. First operand 460 states and 1608 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 16:14:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:42,504 INFO L93 Difference]: Finished difference Result 839 states and 2969 transitions. [2021-10-07 16:14:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:14:42,505 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 16:14:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:42,514 INFO L225 Difference]: With dead ends: 839 [2021-10-07 16:14:42,514 INFO L226 Difference]: Without dead ends: 839 [2021-10-07 16:14:42,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:14:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-10-07 16:14:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 424. [2021-10-07 16:14:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 3.647921760391198) internal successors, (1492), 423 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1492 transitions. [2021-10-07 16:14:42,534 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1492 transitions. Word has length 7 [2021-10-07 16:14:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:42,534 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1492 transitions. [2021-10-07 16:14:42,535 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 16:14:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1492 transitions. [2021-10-07 16:14:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:14:42,535 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:42,535 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:14:42,551 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 16:14:42,748 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 16:14:42,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash -961603338, now seen corresponding path program 1 times [2021-10-07 16:14:42,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:42,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170258891] [2021-10-07 16:14:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:42,751 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:42,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:42,752 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 16:14:42,753 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 16:14:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:14:42,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:43,138 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:14:43,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:14:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:43,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:43,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:43,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170258891] [2021-10-07 16:14:43,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170258891] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:43,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:43,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:14:43,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443020970] [2021-10-07 16:14:43,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:14:43,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:14:43,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:14:43,623 INFO L87 Difference]: Start difference. First operand 424 states and 1492 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:43,676 INFO L93 Difference]: Finished difference Result 388 states and 1376 transitions. [2021-10-07 16:14:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:14:43,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 16:14:43,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:43,680 INFO L225 Difference]: With dead ends: 388 [2021-10-07 16:14:43,681 INFO L226 Difference]: Without dead ends: 388 [2021-10-07 16:14:43,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:14:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-10-07 16:14:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-10-07 16:14:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 379 states have (on average 3.6306068601583115) internal successors, (1376), 387 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1376 transitions. [2021-10-07 16:14:43,696 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1376 transitions. Word has length 7 [2021-10-07 16:14:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:43,697 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1376 transitions. [2021-10-07 16:14:43,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1376 transitions. [2021-10-07 16:14:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:14:43,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:43,701 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 16:14:43,714 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 16:14:43,913 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 16:14:43,914 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:43,915 INFO L82 PathProgramCache]: Analyzing trace with hash -138765873, now seen corresponding path program 2 times [2021-10-07 16:14:43,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:43,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076684979] [2021-10-07 16:14:43,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:14:43,916 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:43,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:43,919 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 16:14:43,920 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 16:14:44,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:14:44,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:14:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:14:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:44,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:44,290 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:44,290 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 16:14:44,609 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 16:14:44,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:46,319 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 16:14:46,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:46,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076684979] [2021-10-07 16:14:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076684979] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:46,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:46,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:14:46,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306191447] [2021-10-07 16:14:46,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:14:46,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:46,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:14:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:14:46,322 INFO L87 Difference]: Start difference. First operand 388 states and 1376 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 16:14:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:53,473 INFO L93 Difference]: Finished difference Result 4944 states and 17724 transitions. [2021-10-07 16:14:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:14:53,477 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 16:14:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:53,511 INFO L225 Difference]: With dead ends: 4944 [2021-10-07 16:14:53,512 INFO L226 Difference]: Without dead ends: 4944 [2021-10-07 16:14:53,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5441.1ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:14:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4944 states. [2021-10-07 16:14:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4944 to 396. [2021-10-07 16:14:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 387 states have (on average 3.5968992248062017) internal successors, (1392), 395 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1392 transitions. [2021-10-07 16:14:53,578 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1392 transitions. Word has length 8 [2021-10-07 16:14:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:53,579 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1392 transitions. [2021-10-07 16:14:53,579 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 16:14:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1392 transitions. [2021-10-07 16:14:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:14:53,580 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:53,580 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:14:53,595 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 16:14:53,793 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 16:14:53,794 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:53,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:53,795 INFO L82 PathProgramCache]: Analyzing trace with hash 255062330, now seen corresponding path program 1 times [2021-10-07 16:14:53,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:53,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125440643] [2021-10-07 16:14:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:53,796 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:53,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:53,798 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 16:14:53,803 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 16:14:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:53,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:14:53,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:54,015 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 16:14:54,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:54,231 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 25 treesize of output 21 [2021-10-07 16:14:54,299 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 16:14:54,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:54,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125440643] [2021-10-07 16:14:54,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125440643] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:54,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:54,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:14:54,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55213237] [2021-10-07 16:14:54,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:14:54,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:54,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:14:54,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:14:54,301 INFO L87 Difference]: Start difference. First operand 396 states and 1392 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 16:14:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:54,852 INFO L93 Difference]: Finished difference Result 1147 states and 4093 transitions. [2021-10-07 16:14:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:14:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 16:14:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:54,859 INFO L225 Difference]: With dead ends: 1147 [2021-10-07 16:14:54,860 INFO L226 Difference]: Without dead ends: 1147 [2021-10-07 16:14:54,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 412.9ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:14:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-10-07 16:14:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 484. [2021-10-07 16:14:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 475 states have (on average 3.8021052631578947) internal successors, (1806), 483 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1806 transitions. [2021-10-07 16:14:54,893 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1806 transitions. Word has length 8 [2021-10-07 16:14:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:54,893 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1806 transitions. [2021-10-07 16:14:54,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 16:14:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1806 transitions. [2021-10-07 16:14:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:14:54,895 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:54,895 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:14:54,907 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 16:14:55,107 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 16:14:55,107 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:55,108 INFO L82 PathProgramCache]: Analyzing trace with hash -682999256, now seen corresponding path program 1 times [2021-10-07 16:14:55,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:55,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734210184] [2021-10-07 16:14:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:55,110 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:55,111 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 16:14:55,112 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 16:14:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:55,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:14:55,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:55,509 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:55,510 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 16:14:55,801 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 16:14:55,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:56,243 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 16:14:56,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:56,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734210184] [2021-10-07 16:14:56,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734210184] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:56,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:56,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:14:56,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309923380] [2021-10-07 16:14:56,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:14:56,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:14:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:14:56,246 INFO L87 Difference]: Start difference. First operand 484 states and 1806 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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 16:14:57,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:57,539 INFO L93 Difference]: Finished difference Result 1042 states and 3816 transitions. [2021-10-07 16:14:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:14:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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 16:14:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:57,546 INFO L225 Difference]: With dead ends: 1042 [2021-10-07 16:14:57,546 INFO L226 Difference]: Without dead ends: 1042 [2021-10-07 16:14:57,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 889.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:14:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-10-07 16:14:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 748. [2021-10-07 16:14:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 739 states have (on average 4.124492557510149) internal successors, (3048), 747 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 3048 transitions. [2021-10-07 16:14:57,582 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 3048 transitions. Word has length 9 [2021-10-07 16:14:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:57,583 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 3048 transitions. [2021-10-07 16:14:57,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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 16:14:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 3048 transitions. [2021-10-07 16:14:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:14:57,584 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:57,584 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-07 16:14:57,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-07 16:14:57,797 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 16:14:57,797 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:57,798 INFO L82 PathProgramCache]: Analyzing trace with hash -777925273, now seen corresponding path program 2 times [2021-10-07 16:14:57,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:57,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690228432] [2021-10-07 16:14:57,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:14:57,800 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:57,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:57,801 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 16:14:57,802 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 16:14:57,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:14:57,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:14:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:14:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:58,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:58,269 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:58,269 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 16:14:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:58,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:00,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:00,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690228432] [2021-10-07 16:15:00,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690228432] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:00,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:00,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:15:00,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966672629] [2021-10-07 16:15:00,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:15:00,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:00,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:15:00,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:15:00,029 INFO L87 Difference]: Start difference. First operand 748 states and 3048 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 16:15:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:09,789 INFO L93 Difference]: Finished difference Result 2432 states and 9316 transitions. [2021-10-07 16:15:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:15:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 16:15:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:09,806 INFO L225 Difference]: With dead ends: 2432 [2021-10-07 16:15:09,806 INFO L226 Difference]: Without dead ends: 2432 [2021-10-07 16:15:09,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4825.8ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:15:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-10-07 16:15:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1242. [2021-10-07 16:15:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1233 states have (on average 4.077858880778589) internal successors, (5028), 1241 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5028 transitions. [2021-10-07 16:15:09,884 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5028 transitions. Word has length 10 [2021-10-07 16:15:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:09,884 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 5028 transitions. [2021-10-07 16:15:09,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 16:15:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5028 transitions. [2021-10-07 16:15:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:15:09,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:09,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:09,903 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 16:15:10,103 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 16:15:10,104 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash 307293158, now seen corresponding path program 1 times [2021-10-07 16:15:10,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:10,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324112053] [2021-10-07 16:15:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:10,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:10,107 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 16:15:10,108 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 16:15:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:15:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:10,545 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:10,545 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 16:15:10,857 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 16:15:10,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:11,591 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 16:15:11,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:11,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324112053] [2021-10-07 16:15:11,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324112053] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:11,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:11,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854934743] [2021-10-07 16:15:11,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:11,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:11,594 INFO L87 Difference]: Start difference. First operand 1242 states and 5028 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 16:15:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:14,920 INFO L93 Difference]: Finished difference Result 2372 states and 9590 transitions. [2021-10-07 16:15:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:15:14,921 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 16:15:14,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:14,934 INFO L225 Difference]: With dead ends: 2372 [2021-10-07 16:15:14,934 INFO L226 Difference]: Without dead ends: 2372 [2021-10-07 16:15:14,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2100.6ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:15:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-10-07 16:15:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1760. [2021-10-07 16:15:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1751 states have (on average 4.138206739006282) internal successors, (7246), 1759 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 7246 transitions. [2021-10-07 16:15:15,015 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 7246 transitions. Word has length 10 [2021-10-07 16:15:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:15,015 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 7246 transitions. [2021-10-07 16:15:15,015 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 16:15:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 7246 transitions. [2021-10-07 16:15:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:15:15,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:15,017 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:15,032 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 16:15:15,230 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 16:15:15,230 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:15,231 INFO L82 PathProgramCache]: Analyzing trace with hash 936156681, now seen corresponding path program 1 times [2021-10-07 16:15:15,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:15,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496850778] [2021-10-07 16:15:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:15,232 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:15,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:15,233 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 16:15:15,244 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 16:15:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 16:15:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:15,691 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 16:15:15,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:15,962 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 16:15:15,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:15,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496850778] [2021-10-07 16:15:15,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496850778] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:15,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:15,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:15:15,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878147151] [2021-10-07 16:15:15,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:15:15,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:15:15,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:15:15,964 INFO L87 Difference]: Start difference. First operand 1760 states and 7246 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:16,747 INFO L93 Difference]: Finished difference Result 1782 states and 7190 transitions. [2021-10-07 16:15:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 16:15:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 16:15:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:16,757 INFO L225 Difference]: With dead ends: 1782 [2021-10-07 16:15:16,757 INFO L226 Difference]: Without dead ends: 1782 [2021-10-07 16:15:16,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:15:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-07 16:15:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1746. [2021-10-07 16:15:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1737 states have (on average 4.095567069660334) internal successors, (7114), 1745 states have internal predecessors, (7114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 7114 transitions. [2021-10-07 16:15:16,836 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 7114 transitions. Word has length 11 [2021-10-07 16:15:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:16,836 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 7114 transitions. [2021-10-07 16:15:16,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 7114 transitions. [2021-10-07 16:15:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:15:16,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:16,838 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2021-10-07 16:15:16,856 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 16:15:17,051 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 16:15:17,052 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash -290420488, now seen corresponding path program 3 times [2021-10-07 16:15:17,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:17,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376763317] [2021-10-07 16:15:17,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:15:17,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:17,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:17,055 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 16:15:17,063 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 16:15:17,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 16:15:17,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:17,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:15:17,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:17,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:17,736 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:17,736 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 16:15:18,252 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 8 treesize of output 6 [2021-10-07 16:15:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:18,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:18,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:18,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:18,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:18,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:18,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2021-10-07 16:15:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:18,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:18,504 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 9 treesize of output 7 [2021-10-07 16:15:18,534 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:15:18,538 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:15:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:20,798 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:20,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376763317] [2021-10-07 16:15:20,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376763317] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:20,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:20,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-10-07 16:15:20,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245171281] [2021-10-07 16:15:20,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 16:15:20,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 16:15:20,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-10-07 16:15:20,801 INFO L87 Difference]: Start difference. First operand 1746 states and 7114 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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 16:15:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:32,569 INFO L93 Difference]: Finished difference Result 5006 states and 19410 transitions. [2021-10-07 16:15:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:15:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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 16:15:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:32,588 INFO L225 Difference]: With dead ends: 5006 [2021-10-07 16:15:32,588 INFO L226 Difference]: Without dead ends: 5006 [2021-10-07 16:15:32,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 7207.0ms TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 16:15:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-10-07 16:15:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 2714. [2021-10-07 16:15:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2705 states have (on average 4.269870609981516) internal successors, (11550), 2713 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 11550 transitions. [2021-10-07 16:15:32,731 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 11550 transitions. Word has length 12 [2021-10-07 16:15:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:32,732 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 11550 transitions. [2021-10-07 16:15:32,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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 16:15:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 11550 transitions. [2021-10-07 16:15:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:15:32,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:32,734 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:32,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-07 16:15:32,948 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 16:15:32,949 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1008388354, now seen corresponding path program 2 times [2021-10-07 16:15:32,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:32,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312248480] [2021-10-07 16:15:32,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:15:32,951 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:32,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:32,953 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 16:15:32,954 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 16:15:33,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:15:33,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:15:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:33,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:33,509 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:33,510 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 16:15:33,965 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 16:15:33,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:35,489 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 16:15:35,490 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:35,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312248480] [2021-10-07 16:15:35,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312248480] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:35,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:35,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:15:35,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90812778] [2021-10-07 16:15:35,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:15:35,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:15:35,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:15:35,492 INFO L87 Difference]: Start difference. First operand 2714 states and 11550 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 16:15:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:42,751 INFO L93 Difference]: Finished difference Result 4687 states and 19987 transitions. [2021-10-07 16:15:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:15:42,754 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 16:15:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:42,775 INFO L225 Difference]: With dead ends: 4687 [2021-10-07 16:15:42,775 INFO L226 Difference]: Without dead ends: 4687 [2021-10-07 16:15:42,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 4827.0ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:15:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2021-10-07 16:15:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3609. [2021-10-07 16:15:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3600 states have (on average 4.448611111111111) internal successors, (16015), 3608 states have internal predecessors, (16015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 16015 transitions. [2021-10-07 16:15:42,941 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 16015 transitions. Word has length 12 [2021-10-07 16:15:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:42,944 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 16015 transitions. [2021-10-07 16:15:42,944 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 16:15:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 16015 transitions. [2021-10-07 16:15:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:15:42,946 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:42,946 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:42,960 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 16:15:43,159 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 16:15:43,160 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1967670086, now seen corresponding path program 2 times [2021-10-07 16:15:43,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:43,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018457606] [2021-10-07 16:15:43,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:15:43,162 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:43,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:43,163 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 16:15:43,164 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 16:15:43,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:15:43,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:43,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:15:43,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:43,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:43,686 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:43,686 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 16:15:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:44,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:45,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:45,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018457606] [2021-10-07 16:15:45,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018457606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:45,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:45,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:15:45,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472548242] [2021-10-07 16:15:45,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:15:45,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:15:45,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:15:45,612 INFO L87 Difference]: Start difference. First operand 3609 states and 16015 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16:15:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:59,874 INFO L93 Difference]: Finished difference Result 4989 states and 20926 transitions. [2021-10-07 16:15:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:15:59,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16:15:59,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:59,893 INFO L225 Difference]: With dead ends: 4989 [2021-10-07 16:15:59,893 INFO L226 Difference]: Without dead ends: 4989 [2021-10-07 16:15:59,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6178.2ms TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:15:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2021-10-07 16:16:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 3673. [2021-10-07 16:16:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3664 states have (on average 4.487445414847161) internal successors, (16442), 3672 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 16442 transitions. [2021-10-07 16:16:00,118 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 16442 transitions. Word has length 12 [2021-10-07 16:16:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:00,119 INFO L470 AbstractCegarLoop]: Abstraction has 3673 states and 16442 transitions. [2021-10-07 16:16:00,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16:16:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 16442 transitions. [2021-10-07 16:16:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:16:00,121 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:00,121 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-07 16:16:00,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:00,322 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 16:16:00,322 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:00,323 INFO L82 PathProgramCache]: Analyzing trace with hash -581246862, now seen corresponding path program 4 times [2021-10-07 16:16:00,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:00,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103052461] [2021-10-07 16:16:00,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:16:00,325 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:00,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:00,326 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 16:16:00,329 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 16:16:00,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:16:00,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:16:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:00,850 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:00,850 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 16:16:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:01,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:03,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:03,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103052461] [2021-10-07 16:16:03,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103052461] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:03,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:03,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:16:03,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446465828] [2021-10-07 16:16:03,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:16:03,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:03,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:16:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:16:03,484 INFO L87 Difference]: Start difference. First operand 3673 states and 16442 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:26,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:26,544 INFO L93 Difference]: Finished difference Result 6327 states and 26761 transitions. [2021-10-07 16:16:26,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 16:16:26,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 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 16:16:26,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:26,569 INFO L225 Difference]: With dead ends: 6327 [2021-10-07 16:16:26,570 INFO L226 Difference]: Without dead ends: 6327 [2021-10-07 16:16:26,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 11130.0ms TimeCoverageRelationStatistics Valid=528, Invalid=2334, Unknown=0, NotChecked=0, Total=2862 [2021-10-07 16:16:26,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2021-10-07 16:16:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 3764. [2021-10-07 16:16:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3755 states have (on average 4.384287616511318) internal successors, (16463), 3763 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 16463 transitions. [2021-10-07 16:16:26,733 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 16463 transitions. Word has length 13 [2021-10-07 16:16:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:26,733 INFO L470 AbstractCegarLoop]: Abstraction has 3764 states and 16463 transitions. [2021-10-07 16:16:26,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 16463 transitions. [2021-10-07 16:16:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:16:26,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:26,735 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:26,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-07 16:16:26,951 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 16:16:26,952 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:26,952 INFO L82 PathProgramCache]: Analyzing trace with hash 503971569, now seen corresponding path program 2 times [2021-10-07 16:16:26,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:26,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782398805] [2021-10-07 16:16:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:16:26,953 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:26,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:26,955 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 16:16:26,956 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 16:16:27,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:16:27,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:27,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:16:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:27,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:27,453 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:27,454 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 16:16:27,804 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 16:16:27,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:28,789 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 16:16:28,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:28,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782398805] [2021-10-07 16:16:28,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782398805] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:16:28,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:16:28,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:16:28,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205280512] [2021-10-07 16:16:28,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:16:28,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:16:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:16:28,791 INFO L87 Difference]: Start difference. First operand 3764 states and 16463 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 16:16:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:29,389 INFO L93 Difference]: Finished difference Result 4358 states and 18668 transitions. [2021-10-07 16:16:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:16:29,396 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 16:16:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:29,411 INFO L225 Difference]: With dead ends: 4358 [2021-10-07 16:16:29,411 INFO L226 Difference]: Without dead ends: 4358 [2021-10-07 16:16:29,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:16:29,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-10-07 16:16:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 2901. [2021-10-07 16:16:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2892 states have (on average 4.200553250345782) internal successors, (12148), 2900 states have internal predecessors, (12148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 12148 transitions. [2021-10-07 16:16:29,534 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 12148 transitions. Word has length 13 [2021-10-07 16:16:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:29,534 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 12148 transitions. [2021-10-07 16:16:29,534 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 16:16:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 12148 transitions. [2021-10-07 16:16:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:16:29,543 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:29,543 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2021-10-07 16:16:29,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:29,750 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 16:16:29,751 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:29,752 INFO L82 PathProgramCache]: Analyzing trace with hash -810101177, now seen corresponding path program 5 times [2021-10-07 16:16:29,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:29,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897656823] [2021-10-07 16:16:29,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:16:29,753 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:29,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:29,755 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 16:16:29,756 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 16:16:30,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 16:16:30,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:16:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:30,368 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:30,368 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 16:16:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:16:30,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:31,370 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 9 treesize of output 7 [2021-10-07 16:16:31,421 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:16:31,425 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:16:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:34,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:34,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897656823] [2021-10-07 16:16:34,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897656823] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:34,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:34,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2021-10-07 16:16:34,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526174035] [2021-10-07 16:16:34,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 16:16:34,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 16:16:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:16:34,303 INFO L87 Difference]: Start difference. First operand 2901 states and 12148 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:40,802 INFO L93 Difference]: Finished difference Result 4199 states and 16727 transitions. [2021-10-07 16:16:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:16:40,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 16:16:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:40,817 INFO L225 Difference]: With dead ends: 4199 [2021-10-07 16:16:40,817 INFO L226 Difference]: Without dead ends: 4199 [2021-10-07 16:16:40,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4949.4ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 16:16:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-10-07 16:16:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3039. [2021-10-07 16:16:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 3030 states have (on average 4.238283828382838) internal successors, (12842), 3038 states have internal predecessors, (12842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 12842 transitions. [2021-10-07 16:16:40,912 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 12842 transitions. Word has length 14 [2021-10-07 16:16:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:40,912 INFO L470 AbstractCegarLoop]: Abstraction has 3039 states and 12842 transitions. [2021-10-07 16:16:40,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 12842 transitions. [2021-10-07 16:16:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:16:40,915 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:40,915 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:40,935 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 16:16:41,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:41,130 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:41,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1592269402, now seen corresponding path program 3 times [2021-10-07 16:16:41,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:41,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49070796] [2021-10-07 16:16:41,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:16:41,132 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:41,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:41,133 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 16:16:41,134 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 16:16:41,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:16:41,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:41,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:16:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:41,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:41,761 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:41,762 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 16:16:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:16:42,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:16:44,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:44,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49070796] [2021-10-07 16:16:44,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49070796] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:44,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:44,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:16:44,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331118759] [2021-10-07 16:16:44,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:16:44,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:44,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:16:44,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:16:44,454 INFO L87 Difference]: Start difference. First operand 3039 states and 12842 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:45,735 INFO L93 Difference]: Finished difference Result 3187 states and 13157 transitions. [2021-10-07 16:16:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:16:45,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 16:16:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:45,746 INFO L225 Difference]: With dead ends: 3187 [2021-10-07 16:16:45,746 INFO L226 Difference]: Without dead ends: 3187 [2021-10-07 16:16:45,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1289.4ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:16:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-10-07 16:16:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2077. [2021-10-07 16:16:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2072 states have (on average 4.056467181467181) internal successors, (8405), 2076 states have internal predecessors, (8405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 8405 transitions. [2021-10-07 16:16:45,812 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 8405 transitions. Word has length 14 [2021-10-07 16:16:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:45,812 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 8405 transitions. [2021-10-07 16:16:45,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:45,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 8405 transitions. [2021-10-07 16:16:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:16:45,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:45,815 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:45,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-07 16:16:46,017 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 16:16:46,018 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:46,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1265232291, now seen corresponding path program 3 times [2021-10-07 16:16:46,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:46,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008053867] [2021-10-07 16:16:46,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:16:46,020 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:46,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:46,021 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 16:16:46,024 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 16:16:46,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 16:16:46,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:46,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:16:46,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:46,769 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:46,770 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 16:16:46,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-07 16:16:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:16:47,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:16:47,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:47,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008053867] [2021-10-07 16:16:47,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008053867] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:47,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:47,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 16:16:47,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359096690] [2021-10-07 16:16:47,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:16:47,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:16:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:16:47,658 INFO L87 Difference]: Start difference. First operand 2077 states and 8405 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) 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 16:16:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:50,484 INFO L93 Difference]: Finished difference Result 2223 states and 8663 transitions. [2021-10-07 16:16:50,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:16:50,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) 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 14 [2021-10-07 16:16:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:50,492 INFO L225 Difference]: With dead ends: 2223 [2021-10-07 16:16:50,492 INFO L226 Difference]: Without dead ends: 2223 [2021-10-07 16:16:50,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1518.6ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-07 16:16:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-10-07 16:16:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 2091. [2021-10-07 16:16:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2091 states, 2086 states have (on average 4.017737296260786) internal successors, (8381), 2090 states have internal predecessors, (8381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 8381 transitions. [2021-10-07 16:16:50,555 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 8381 transitions. Word has length 14 [2021-10-07 16:16:50,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:50,556 INFO L470 AbstractCegarLoop]: Abstraction has 2091 states and 8381 transitions. [2021-10-07 16:16:50,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) 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 16:16:50,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 8381 transitions. [2021-10-07 16:16:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:16:50,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:50,563 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:50,589 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 16:16:50,777 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 16:16:50,778 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1938278139, now seen corresponding path program 4 times [2021-10-07 16:16:50,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:50,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724644546] [2021-10-07 16:16:50,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:16:50,780 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:50,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:50,782 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 16:16:50,784 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 16:16:51,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:16:51,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:51,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:16:51,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:51,388 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:51,388 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 16:16:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:52,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:54,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:54,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724644546] [2021-10-07 16:16:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724644546] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:54,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:54,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:16:54,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420492764] [2021-10-07 16:16:54,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:16:54,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:54,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:16:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:16:54,651 INFO L87 Difference]: Start difference. First operand 2091 states and 8381 transitions. Second operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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 16:17:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:18,061 INFO L93 Difference]: Finished difference Result 4349 states and 16239 transitions. [2021-10-07 16:17:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 16:17:18,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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 16:17:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:18,079 INFO L225 Difference]: With dead ends: 4349 [2021-10-07 16:17:18,080 INFO L226 Difference]: Without dead ends: 4349 [2021-10-07 16:17:18,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 12567.1ms TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2021-10-07 16:17:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-10-07 16:17:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 2961. [2021-10-07 16:17:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2956 states have (on average 4.25) internal successors, (12563), 2960 states have internal predecessors, (12563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 12563 transitions. [2021-10-07 16:17:18,183 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 12563 transitions. Word has length 15 [2021-10-07 16:17:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:18,183 INFO L470 AbstractCegarLoop]: Abstraction has 2961 states and 12563 transitions. [2021-10-07 16:17:18,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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 16:17:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 12563 transitions. [2021-10-07 16:17:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:17:18,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:18,187 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:18,202 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 16:17:18,401 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 16:17:18,402 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:18,403 INFO L82 PathProgramCache]: Analyzing trace with hash -687481528, now seen corresponding path program 5 times [2021-10-07 16:17:18,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:18,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621965420] [2021-10-07 16:17:18,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:17:18,404 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:18,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:18,405 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 16:17:18,406 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 16:17:18,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 16:17:18,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:18,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 16:17:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:18,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:19,106 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:19,107 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 16:17:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:17:19,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:19,957 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 9 treesize of output 7 [2021-10-07 16:17:19,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:17:19,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:17:19,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:17:19,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:17:19,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:17:19,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:17:19,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2021-10-07 16:17:20,046 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:17:22,777 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 16:17:22,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:22,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621965420] [2021-10-07 16:17:22,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621965420] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:22,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:22,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-10-07 16:17:22,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201316618] [2021-10-07 16:17:22,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 16:17:22,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 16:17:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:17:22,779 INFO L87 Difference]: Start difference. First operand 2961 states and 12563 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:28,460 INFO L93 Difference]: Finished difference Result 3583 states and 13903 transitions. [2021-10-07 16:17:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 16:17:28,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 16:17:28,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:28,474 INFO L225 Difference]: With dead ends: 3583 [2021-10-07 16:17:28,475 INFO L226 Difference]: Without dead ends: 3583 [2021-10-07 16:17:28,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4311.2ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 16:17:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-10-07 16:17:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 2807. [2021-10-07 16:17:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2802 states have (on average 4.210920770877944) internal successors, (11799), 2806 states have internal predecessors, (11799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 11799 transitions. [2021-10-07 16:17:28,560 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 11799 transitions. Word has length 15 [2021-10-07 16:17:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:28,560 INFO L470 AbstractCegarLoop]: Abstraction has 2807 states and 11799 transitions. [2021-10-07 16:17:28,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 11799 transitions. [2021-10-07 16:17:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:17:28,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:28,564 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 16:17:28,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-07 16:17:28,779 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 16:17:28,779 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash 897916751, now seen corresponding path program 3 times [2021-10-07 16:17:28,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:28,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675007688] [2021-10-07 16:17:28,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:17:28,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:28,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:28,783 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 16:17:28,784 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 16:17:29,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 16:17:29,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:29,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:17:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:29,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:29,647 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:29,648 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 16:17:30,363 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 16:17:30,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:35,644 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 16:17:35,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:35,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675007688] [2021-10-07 16:17:35,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675007688] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:35,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:35,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:17:35,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023305199] [2021-10-07 16:17:35,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:17:35,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:17:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:17:35,646 INFO L87 Difference]: Start difference. First operand 2807 states and 11799 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 16:17:47,910 WARN L207 SmtUtils]: Spent 9.36 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 16:17:57,429 WARN L207 SmtUtils]: Spent 8.67 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:18:04,774 WARN L207 SmtUtils]: Spent 6.49 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 16:18:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:39,057 INFO L93 Difference]: Finished difference Result 55766 states and 247472 transitions. [2021-10-07 16:18:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:18:39,067 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 16:18:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:39,943 INFO L225 Difference]: With dead ends: 55766 [2021-10-07 16:18:39,943 INFO L226 Difference]: Without dead ends: 55766 [2021-10-07 16:18:39,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 55393.6ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:18:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55766 states. [2021-10-07 16:18:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55766 to 2823. [2021-10-07 16:18:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2818 states have (on average 4.198367636621717) internal successors, (11831), 2822 states have internal predecessors, (11831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 11831 transitions. [2021-10-07 16:18:41,038 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 11831 transitions. Word has length 16 [2021-10-07 16:18:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:41,038 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 11831 transitions. [2021-10-07 16:18:41,038 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 16:18:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 11831 transitions. [2021-10-07 16:18:41,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 16:18:41,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:41,046 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2021-10-07 16:18:41,083 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 16:18:41,270 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 16:18:41,271 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:18:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash 504727218, now seen corresponding path program 6 times [2021-10-07 16:18:41,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:41,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32738271] [2021-10-07 16:18:41,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:18:41,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:41,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:41,275 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 16:18:41,278 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 16:18:42,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:18:42,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:42,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 16:18:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:42,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:18:42,359 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:18:42,359 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 16:18:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:43,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:43,695 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 9 treesize of output 7 [2021-10-07 16:18:43,756 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:18:43,759 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:18:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:50,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:50,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32738271] [2021-10-07 16:18:50,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32738271] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:50,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:50,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 33 [2021-10-07 16:18:50,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433010218] [2021-10-07 16:18:50,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-07 16:18:50,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-07 16:18:50,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:18:50,514 INFO L87 Difference]: Start difference. First operand 2823 states and 11831 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 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 16:19:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:25,687 INFO L93 Difference]: Finished difference Result 8749 states and 34613 transitions. [2021-10-07 16:19:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-07 16:19:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 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 19 [2021-10-07 16:19:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:25,718 INFO L225 Difference]: With dead ends: 8749 [2021-10-07 16:19:25,719 INFO L226 Difference]: Without dead ends: 8749 [2021-10-07 16:19:25,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 21830.2ms TimeCoverageRelationStatistics Valid=943, Invalid=4027, Unknown=0, NotChecked=0, Total=4970 [2021-10-07 16:19:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8749 states. [2021-10-07 16:19:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8749 to 4517. [2021-10-07 16:19:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4512 states have (on average 4.190602836879433) internal successors, (18908), 4516 states have internal predecessors, (18908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 18908 transitions. [2021-10-07 16:19:25,922 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 18908 transitions. Word has length 19 [2021-10-07 16:19:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:25,923 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 18908 transitions. [2021-10-07 16:19:25,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 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 16:19:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 18908 transitions. [2021-10-07 16:19:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 16:19:25,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:25,931 INFO L512 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1] [2021-10-07 16:19:25,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:26,145 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 16:19:26,146 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:19:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1728640317, now seen corresponding path program 7 times [2021-10-07 16:19:26,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:26,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038331677] [2021-10-07 16:19:26,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:19:26,148 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:26,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:26,149 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 16:19:26,150 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 16:19:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:26,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-07 16:19:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:26,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:26,886 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:26,887 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 16:19:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:19:27,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:34,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:34,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038331677] [2021-10-07 16:19:34,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038331677] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:34,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:34,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 36 [2021-10-07 16:19:34,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126971890] [2021-10-07 16:19:34,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 16:19:34,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 16:19:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:19:34,033 INFO L87 Difference]: Start difference. First operand 4517 states and 18908 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:25,763 INFO L93 Difference]: Finished difference Result 10542 states and 41812 transitions. [2021-10-07 16:20:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-07 16:20:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 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 21 [2021-10-07 16:20:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:25,801 INFO L225 Difference]: With dead ends: 10542 [2021-10-07 16:20:25,802 INFO L226 Difference]: Without dead ends: 10542 [2021-10-07 16:20:25,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2183 ImplicationChecksByTransitivity, 28310.6ms TimeCoverageRelationStatistics Valid=1733, Invalid=7579, Unknown=0, NotChecked=0, Total=9312 [2021-10-07 16:20:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10542 states. [2021-10-07 16:20:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10542 to 5492. [2021-10-07 16:20:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5487 states have (on average 4.227264443229451) internal successors, (23195), 5491 states have internal predecessors, (23195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 23195 transitions. [2021-10-07 16:20:26,022 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 23195 transitions. Word has length 21 [2021-10-07 16:20:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:26,022 INFO L470 AbstractCegarLoop]: Abstraction has 5492 states and 23195 transitions. [2021-10-07 16:20:26,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 23195 transitions. [2021-10-07 16:20:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 16:20:26,031 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:26,031 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:26,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:26,244 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 16:20:26,245 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:20:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:26,246 INFO L82 PathProgramCache]: Analyzing trace with hash 50396677, now seen corresponding path program 6 times [2021-10-07 16:20:26,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:26,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908356994] [2021-10-07 16:20:26,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:20:26,247 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:26,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:26,248 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 16:20:26,249 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 16:20:27,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:20:27,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:20:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:27,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:27,484 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:27,484 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 16:20:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-07 16:20:31,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:32,994 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-07 16:20:32,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 124 [2021-10-07 16:20:33,243 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 9 treesize of output 7 [2021-10-07 16:20:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-07 16:20:40,636 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:40,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908356994] [2021-10-07 16:20:40,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908356994] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:40,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:40,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-07 16:20:40,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409839362] [2021-10-07 16:20:40,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 16:20:40,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 16:20:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:20:40,638 INFO L87 Difference]: Start difference. First operand 5492 states and 23195 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 16:20:53,258 WARN L207 SmtUtils]: Spent 8.61 s on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-10-07 16:21:03,875 WARN L207 SmtUtils]: Spent 8.84 s on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-10-07 16:21:21,379 WARN L207 SmtUtils]: Spent 6.91 s on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-10-07 16:21:36,861 WARN L207 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-10-07 16:22:30,645 WARN L207 SmtUtils]: Spent 12.57 s on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2021-10-07 16:22:49,314 WARN L207 SmtUtils]: Spent 9.02 s on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2021-10-07 16:23:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:23:27,661 INFO L93 Difference]: Finished difference Result 6662 states and 25678 transitions. [2021-10-07 16:23:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 16:23:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 21 [2021-10-07 16:23:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:23:27,686 INFO L225 Difference]: With dead ends: 6662 [2021-10-07 16:23:27,686 INFO L226 Difference]: Without dead ends: 6662 [2021-10-07 16:23:27,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 100543.2ms TimeCoverageRelationStatistics Valid=427, Invalid=1735, Unknown=0, NotChecked=0, Total=2162 [2021-10-07 16:23:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2021-10-07 16:23:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 5200. [2021-10-07 16:23:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5200 states, 5195 states have (on average 4.2055822906641005) internal successors, (21848), 5199 states have internal predecessors, (21848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:23:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 21848 transitions. [2021-10-07 16:23:27,912 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 21848 transitions. Word has length 21 [2021-10-07 16:23:27,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:23:27,912 INFO L470 AbstractCegarLoop]: Abstraction has 5200 states and 21848 transitions. [2021-10-07 16:23:27,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 16:23:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 21848 transitions. [2021-10-07 16:23:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:23:27,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:23:27,921 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:23:27,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-10-07 16:23:28,128 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 16:23:28,129 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:23:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:23:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1709528902, now seen corresponding path program 7 times [2021-10-07 16:23:28,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:23:28,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097931731] [2021-10-07 16:23:28,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:23:28,132 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:23:28,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:23:28,133 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 16:23:28,139 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 16:23:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:23:28,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 16:23:28,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:23:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:29,177 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:23:29,178 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 16:23:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:23:31,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:23:39,792 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 16:23:39,792 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:23:39,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097931731] [2021-10-07 16:23:39,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097931731] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:23:39,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:23:39,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-07 16:23:39,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077455282] [2021-10-07 16:23:39,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 16:23:39,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:23:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 16:23:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:23:39,794 INFO L87 Difference]: Start difference. First operand 5200 states and 21848 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 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 16:25:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:25:47,853 INFO L93 Difference]: Finished difference Result 10855 states and 40085 transitions. [2021-10-07 16:25:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-07 16:25:47,857 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 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 16:25:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:25:47,899 INFO L225 Difference]: With dead ends: 10855 [2021-10-07 16:25:47,899 INFO L226 Difference]: Without dead ends: 10855 [2021-10-07 16:25:47,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2243 ImplicationChecksByTransitivity, 61026.2ms TimeCoverageRelationStatistics Valid=1912, Invalid=7594, Unknown=0, NotChecked=0, Total=9506 [2021-10-07 16:25:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-10-07 16:25:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 4983. [2021-10-07 16:25:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4983 states, 4978 states have (on average 4.169345118521495) internal successors, (20755), 4982 states have internal predecessors, (20755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:25:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4983 states to 4983 states and 20755 transitions. [2021-10-07 16:25:48,068 INFO L78 Accepts]: Start accepts. Automaton has 4983 states and 20755 transitions. Word has length 22 [2021-10-07 16:25:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:25:48,069 INFO L470 AbstractCegarLoop]: Abstraction has 4983 states and 20755 transitions. [2021-10-07 16:25:48,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 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 16:25:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4983 states and 20755 transitions. [2021-10-07 16:25:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:25:48,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:25:48,075 INFO L512 BasicCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1] [2021-10-07 16:25:48,088 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 16:25:48,281 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 16:25:48,282 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:25:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:25:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash -771356142, now seen corresponding path program 8 times [2021-10-07 16:25:48,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:25:48,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397050236] [2021-10-07 16:25:48,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:25:48,284 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:25:48,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:25:48,285 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 16:25:48,286 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 16:25:48,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:25:48,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:25:48,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 16:25:48,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:25:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:49,454 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:25:49,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 16:25:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:25:52,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:26:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:26:03,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:26:03,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397050236] [2021-10-07 16:26:03,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397050236] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:26:03,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:26:03,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2021-10-07 16:26:03,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630572182] [2021-10-07 16:26:03,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-07 16:26:03,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:26:03,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-07 16:26:03,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1464, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 16:26:03,582 INFO L87 Difference]: Start difference. First operand 4983 states and 20755 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-10-07 16:27:35,784 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 16:27:35,784 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:27:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-07 16:27:35,995 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:27:36,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:36,196 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 16:27:36,198 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). [2021-10-07 16:27:36,201 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:27:36,201 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:27:36,201 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:27:36,201 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:27:36,201 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:27:36,202 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:27:36,203 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:27:36,204 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:27:36,204 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:27:36,204 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:27:36,204 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:27:36,204 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:27:36,204 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:27:36,204 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:27:36,204 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:27:36,204 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:27:36,205 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:27:36,205 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:27:36,205 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:27:36,205 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:27:36,205 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:27:36,205 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:27:36,205 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:27:36,211 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:27:36,212 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:27:36,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:27:36 BasicIcfg [2021-10-07 16:27:36,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:27:36,215 INFO L168 Benchmark]: Toolchain (without parser) took 838600.05 ms. Allocated memory was 155.2 MB in the beginning and 476.1 MB in the end (delta: 320.9 MB). Free memory was 129.6 MB in the beginning and 188.8 MB in the end (delta: -59.2 MB). Peak memory consumption was 262.2 MB. Max. memory is 8.0 GB. [2021-10-07 16:27:36,215 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:27:36,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 500.22 ms. Allocated memory is still 155.2 MB. Free memory was 129.4 MB in the beginning and 116.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:27:36,216 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.52 ms. Allocated memory is still 155.2 MB. Free memory was 115.8 MB in the beginning and 114.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:27:36,216 INFO L168 Benchmark]: Boogie Preprocessor took 39.78 ms. Allocated memory is still 155.2 MB. Free memory was 114.0 MB in the beginning and 112.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:27:36,216 INFO L168 Benchmark]: RCFGBuilder took 1641.93 ms. Allocated memory is still 155.2 MB. Free memory was 112.3 MB in the beginning and 117.9 MB in the end (delta: -5.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:27:36,217 INFO L168 Benchmark]: TraceAbstraction took 836356.33 ms. Allocated memory was 155.2 MB in the beginning and 476.1 MB in the end (delta: 320.9 MB). Free memory was 117.4 MB in the beginning and 188.8 MB in the end (delta: -71.5 MB). Peak memory consumption was 248.9 MB. Max. memory is 8.0 GB. [2021-10-07 16:27:36,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 500.22 ms. Allocated memory is still 155.2 MB. Free memory was 129.4 MB in the beginning and 116.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.52 ms. Allocated memory is still 155.2 MB. Free memory was 115.8 MB in the beginning and 114.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.78 ms. Allocated memory is still 155.2 MB. Free memory was 114.0 MB in the beginning and 112.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1641.93 ms. Allocated memory is still 155.2 MB. Free memory was 112.3 MB in the beginning and 117.9 MB in the end (delta: -5.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 836356.33 ms. Allocated memory was 155.2 MB in the beginning and 476.1 MB in the end (delta: 320.9 MB). Free memory was 117.4 MB in the beginning and 188.8 MB in the end (delta: -71.5 MB). Peak memory consumption was 248.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 26852.0ms, 169 PlacesBefore, 61 PlacesAfterwards, 172 TransitionsBefore, 55 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 7 FixpointIterations, 92 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 181 TotalNumberOfCompositions, 3569 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3306, positive: 3275, positive conditional: 0, positive unconditional: 3275, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1349, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1349, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 9, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 922, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 922, negative conditional: 0, negative unconditional: 922, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3306, positive: 1935, positive conditional: 0, positive unconditional: 1935, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 1349, unknown conditional: 0, unknown unconditional: 1349] , Statistics on independence cache: Total cache size (in pairs): 150, Positive cache size: 148, Positive conditional cache size: 0, Positive unconditional cache size: 148, 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: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 72 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (4342 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 202 locations, 43 error locations. Started 1 CEGAR loops. OverallTime: 836208.9ms, OverallIterations: 35, TraceHistogramMax: 14, EmptinessCheckTime: 100.0ms, AutomataDifference: 664858.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26987.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2354 SDtfs, 29619 SDslu, 27554 SDs, 0 SdLazy, 41671 SolverSat, 1665 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 310997.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1132 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 925 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11239 ImplicationChecksByTransitivity, 393576.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5492occurred in iteration=32, InterpolantAutomatonStates: 590, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3955.1ms AutomataMinimizationTime, 34 MinimizatonAttempts, 94809 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 321.0ms SsaConstructionTime, 4086.9ms SatisfiabilityAnalysisTime, 123121.1ms InterpolantComputationTime, 371 NumberOfCodeBlocks, 365 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 672 ConstructedInterpolants, 158 QuantifiedInterpolants, 17313 SizeOfPredicates, 441 NumberOfNonLiveVariables, 2889 ConjunctsInSsa, 592 ConjunctsInUnsatCore, 70 InterpolantComputations, 17 PerfectInterpolantSequences, 270/1388 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