/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/bench/exp2x9.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-06 21:12:34,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-06 21:12:34,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-06 21:12:34,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-06 21:12:34,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-06 21:12:34,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-06 21:12:34,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-06 21:12:34,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-06 21:12:34,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-06 21:12:34,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-06 21:12:34,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-06 21:12:34,569 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-06 21:12:34,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-06 21:12:34,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-06 21:12:34,573 INFO L138 SettingsManager]: * Use SBE=true [2021-10-06 21:12:34,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-06 21:12:34,574 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-06 21:12:34,574 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-06 21:12:34,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-06 21:12:34,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-06 21:12:34,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-06 21:12:34,575 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-06 21:12:34,576 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-06 21:12:34,576 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-06 21:12:34,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-06 21:12:34,576 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-06 21:12:34,577 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-06 21:12:34,577 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-06 21:12:34,577 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-06 21:12:34,577 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-06 21:12:34,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-06 21:12:34,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-06 21:12:34,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-06 21:12:34,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 21:12:34,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-06 21:12:34,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-06 21:12:34,579 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-06 21:12:34,579 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-06 21:12:34,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-06 21:12:34,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-06 21:12:34,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-06 21:12:34,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-06 21:12:34,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-06 21:12:34,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-06 21:12:34,984 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-06 21:12:34,985 INFO L275 PluginConnector]: CDTParser initialized [2021-10-06 21:12:34,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench/exp2x9.wvr.c [2021-10-06 21:12:35,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7a513ee3/467b4020c7224e9ebc795e492fb848fc/FLAG8f2bd8741 [2021-10-06 21:12:35,674 INFO L306 CDTParser]: Found 1 translation units. [2021-10-06 21:12:35,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/bench/exp2x9.wvr.c [2021-10-06 21:12:35,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7a513ee3/467b4020c7224e9ebc795e492fb848fc/FLAG8f2bd8741 [2021-10-06 21:12:36,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7a513ee3/467b4020c7224e9ebc795e492fb848fc [2021-10-06 21:12:36,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-06 21:12:36,051 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-06 21:12:36,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-06 21:12:36,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-06 21:12:36,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-06 21:12:36,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c75c6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36, skipping insertion in model container [2021-10-06 21:12:36,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-06 21:12:36,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-06 21:12:36,290 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/bench/exp2x9.wvr.c[2632,2645] [2021-10-06 21:12:36,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 21:12:36,322 INFO L203 MainTranslator]: Completed pre-run [2021-10-06 21:12:36,351 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/bench/exp2x9.wvr.c[2632,2645] [2021-10-06 21:12:36,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 21:12:36,372 INFO L208 MainTranslator]: Completed translation [2021-10-06 21:12:36,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36 WrapperNode [2021-10-06 21:12:36,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-06 21:12:36,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-06 21:12:36,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-06 21:12:36,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-06 21:12:36,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-06 21:12:36,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-06 21:12:36,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-06 21:12:36,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-06 21:12:36,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-06 21:12:36,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-06 21:12:36,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-06 21:12:36,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-06 21:12:36,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (1/1) ... [2021-10-06 21:12:36,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 21:12:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 21:12:36,526 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) [2021-10-06 21:12:36,543 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 [2021-10-06 21:12:36,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-06 21:12:36,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-06 21:12:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-06 21:12:36,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-06 21:12:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-06 21:12:36,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-06 21:12:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-06 21:12:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-06 21:12:36,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-06 21:12:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-06 21:12:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-06 21:12:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-06 21:12:36,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-06 21:12:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-06 21:12:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-06 21:12:36,598 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-06 21:12:37,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-06 21:12:37,189 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-06 21:12:37,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 09:12:37 BoogieIcfgContainer [2021-10-06 21:12:37,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-06 21:12:37,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-06 21:12:37,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-06 21:12:37,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-06 21:12:37,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 09:12:36" (1/3) ... [2021-10-06 21:12:37,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67eb48b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 09:12:37, skipping insertion in model container [2021-10-06 21:12:37,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:12:36" (2/3) ... [2021-10-06 21:12:37,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67eb48b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 09:12:37, skipping insertion in model container [2021-10-06 21:12:37,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 09:12:37" (3/3) ... [2021-10-06 21:12:37,252 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x9.wvr.c [2021-10-06 21:12:37,267 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-06 21:12:37,267 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-06 21:12:37,267 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-06 21:12:37,371 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,372 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,372 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,372 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,376 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,376 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,377 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,377 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,380 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,380 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,381 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,381 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,382 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,382 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,382 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,382 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,392 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,392 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,403 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,403 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,413 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,413 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,416 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,416 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:12:37,438 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-06 21:12:37,491 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-06 21:12:37,499 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 [2021-10-06 21:12:37,500 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-06 21:12:37,520 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-06 21:12:37,533 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 158 transitions, 348 flow [2021-10-06 21:12:37,537 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 158 transitions, 348 flow [2021-10-06 21:12:37,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 161 places, 158 transitions, 348 flow [2021-10-06 21:12:37,626 INFO L129 PetriNetUnfolder]: 10/154 cut-off events. [2021-10-06 21:12:37,626 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-06 21:12:37,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 154 events. 10/154 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2021-10-06 21:12:37,640 INFO L116 LiptonReduction]: Number of co-enabled transitions 4080 [2021-10-06 21:12:56,141 INFO L131 LiptonReduction]: Checked pairs total: 4091 [2021-10-06 21:12:56,141 INFO L133 LiptonReduction]: Total number of compositions: 152 [2021-10-06 21:12:56,150 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 47 transitions, 126 flow [2021-10-06 21:12:56,184 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:12:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:12:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-06 21:12:56,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:12:56,207 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-06 21:12:56,208 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:12:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:12:56,215 INFO L82 PathProgramCache]: Analyzing trace with hash 591, now seen corresponding path program 1 times [2021-10-06 21:12:56,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:12:56,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94770120] [2021-10-06 21:12:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:12:56,231 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:12:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:12:56,235 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) [2021-10-06 21:12:56,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-06 21:12:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:12:56,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-06 21:12:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:12:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:12:56,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:12:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:12:56,316 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:12:56,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94770120] [2021-10-06 21:12:56,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94770120] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:12:56,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:12:56,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-06 21:12:56,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290442820] [2021-10-06 21:12:56,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-06 21:12:56,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:12:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-06 21:12:56,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-06 21:12:56,347 INFO L87 Difference]: Start difference. First operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:12:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:12:56,378 INFO L93 Difference]: Finished difference Result 180 states and 692 transitions. [2021-10-06 21:12:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-06 21:12:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2021-10-06 21:12:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:12:56,413 INFO L225 Difference]: With dead ends: 180 [2021-10-06 21:12:56,413 INFO L226 Difference]: Without dead ends: 180 [2021-10-06 21:12:56,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-06 21:12:56,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-06 21:12:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-10-06 21:12:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 165 states have (on average 4.193939393939394) internal successors, (692), 179 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:12:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 692 transitions. [2021-10-06 21:12:56,492 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 692 transitions. Word has length 1 [2021-10-06 21:12:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:12:56,492 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 692 transitions. [2021-10-06 21:12:56,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:12:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 692 transitions. [2021-10-06 21:12:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-06 21:12:56,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:12:56,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-06 21:12:56,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-06 21:12:56,707 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 [2021-10-06 21:12:56,708 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:12:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:12:56,710 INFO L82 PathProgramCache]: Analyzing trace with hash 581945, now seen corresponding path program 1 times [2021-10-06 21:12:56,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:12:56,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719572980] [2021-10-06 21:12:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:12:56,711 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:12:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:12:56,713 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) [2021-10-06 21:12:56,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-06 21:12:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:12:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 21:12:56,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:12:56,985 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-06 21:12:56,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 42 [2021-10-06 21:12:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:12:57,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:12:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:12:57,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:12:57,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719572980] [2021-10-06 21:12:57,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719572980] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:12:57,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:12:57,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:12:57,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175768115] [2021-10-06 21:12:57,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:12:57,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:12:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:12:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:12:57,249 INFO L87 Difference]: Start difference. First operand 180 states and 692 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) [2021-10-06 21:12:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:12:57,326 INFO L93 Difference]: Finished difference Result 170 states and 656 transitions. [2021-10-06 21:12:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:12:57,327 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 [2021-10-06 21:12:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:12:57,331 INFO L225 Difference]: With dead ends: 170 [2021-10-06 21:12:57,331 INFO L226 Difference]: Without dead ends: 170 [2021-10-06 21:12:57,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:12:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-06 21:12:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-06 21:12:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 157 states have (on average 4.178343949044586) internal successors, (656), 169 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:12:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 656 transitions. [2021-10-06 21:12:57,355 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 656 transitions. Word has length 3 [2021-10-06 21:12:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:12:57,356 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 656 transitions. [2021-10-06 21:12:57,357 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) [2021-10-06 21:12:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 656 transitions. [2021-10-06 21:12:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-06 21:12:57,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:12:57,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-06 21:12:57,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-06 21:12:57,572 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 [2021-10-06 21:12:57,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:12:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:12:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash 581946, now seen corresponding path program 1 times [2021-10-06 21:12:57,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:12:57,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045441031] [2021-10-06 21:12:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:12:57,577 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:12:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:12:57,581 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) [2021-10-06 21:12:57,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-06 21:12:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:12:57,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:12:57,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:12:57,917 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-06 21:12:57,917 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 34 treesize of output 72 [2021-10-06 21:12:57,927 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 74 treesize of output 72 [2021-10-06 21:12:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:12:58,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:12:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:12:58,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:12:58,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045441031] [2021-10-06 21:12:58,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045441031] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:12:58,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:12:58,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:12:58,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403958729] [2021-10-06 21:12:58,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:12:58,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:12:58,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:12:58,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:12:58,214 INFO L87 Difference]: Start difference. First operand 170 states and 656 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) [2021-10-06 21:12:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:12:58,284 INFO L93 Difference]: Finished difference Result 160 states and 620 transitions. [2021-10-06 21:12:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:12:58,285 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 [2021-10-06 21:12:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:12:58,288 INFO L225 Difference]: With dead ends: 160 [2021-10-06 21:12:58,288 INFO L226 Difference]: Without dead ends: 160 [2021-10-06 21:12:58,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:12:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-06 21:12:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-10-06 21:12:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 149 states have (on average 4.1610738255033555) internal successors, (620), 159 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:12:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 620 transitions. [2021-10-06 21:12:58,303 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 620 transitions. Word has length 3 [2021-10-06 21:12:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:12:58,304 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 620 transitions. [2021-10-06 21:12:58,304 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) [2021-10-06 21:12:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 620 transitions. [2021-10-06 21:12:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 21:12:58,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:12:58,305 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 21:12:58,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-06 21:12:58,517 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 [2021-10-06 21:12:58,518 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:12:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:12:58,519 INFO L82 PathProgramCache]: Analyzing trace with hash 559261075, now seen corresponding path program 1 times [2021-10-06 21:12:58,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:12:58,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215752778] [2021-10-06 21:12:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:12:58,522 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:12:58,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:12:58,525 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) [2021-10-06 21:12:58,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-06 21:12:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:12:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:12:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:12:58,884 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-06 21:12:58,885 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 36 treesize of output 74 [2021-10-06 21:12:58,892 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 77 treesize of output 75 [2021-10-06 21:12:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:12:59,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:12:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:12:59,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:12:59,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215752778] [2021-10-06 21:12:59,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215752778] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:12:59,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:12:59,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:12:59,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170531869] [2021-10-06 21:12:59,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:12:59,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:12:59,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:12:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:12:59,561 INFO L87 Difference]: Start difference. First operand 160 states and 620 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) [2021-10-06 21:12:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:12:59,634 INFO L93 Difference]: Finished difference Result 152 states and 596 transitions. [2021-10-06 21:12:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:12:59,635 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 [2021-10-06 21:12:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:12:59,638 INFO L225 Difference]: With dead ends: 152 [2021-10-06 21:12:59,638 INFO L226 Difference]: Without dead ends: 152 [2021-10-06 21:12:59,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:12:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-06 21:12:59,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-10-06 21:12:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 143 states have (on average 4.1678321678321675) internal successors, (596), 151 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:12:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 596 transitions. [2021-10-06 21:12:59,650 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 596 transitions. Word has length 5 [2021-10-06 21:12:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:12:59,651 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 596 transitions. [2021-10-06 21:12:59,651 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) [2021-10-06 21:12:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 596 transitions. [2021-10-06 21:12:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 21:12:59,651 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:12:59,652 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 21:12:59,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-06 21:12:59,867 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 [2021-10-06 21:12:59,868 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:12:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:12:59,869 INFO L82 PathProgramCache]: Analyzing trace with hash 559261077, now seen corresponding path program 1 times [2021-10-06 21:12:59,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:12:59,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618262763] [2021-10-06 21:12:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:12:59,870 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:12:59,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:12:59,872 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) [2021-10-06 21:12:59,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-06 21:12:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:12:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 21:12:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:00,011 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-06 21:13:00,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 45 [2021-10-06 21:13:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:00,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:00,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:00,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618262763] [2021-10-06 21:13:00,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618262763] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:13:00,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:13:00,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:13:00,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836128741] [2021-10-06 21:13:00,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:13:00,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:13:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:13:00,408 INFO L87 Difference]: Start difference. First operand 152 states and 596 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) [2021-10-06 21:13:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:00,457 INFO L93 Difference]: Finished difference Result 144 states and 572 transitions. [2021-10-06 21:13:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:13:00,458 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 [2021-10-06 21:13:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:00,460 INFO L225 Difference]: With dead ends: 144 [2021-10-06 21:13:00,460 INFO L226 Difference]: Without dead ends: 144 [2021-10-06 21:13:00,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:13:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-06 21:13:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-06 21:13:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 4.175182481751825) internal successors, (572), 143 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 572 transitions. [2021-10-06 21:13:00,469 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 572 transitions. Word has length 5 [2021-10-06 21:13:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:00,470 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 572 transitions. [2021-10-06 21:13:00,470 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) [2021-10-06 21:13:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 572 transitions. [2021-10-06 21:13:00,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-06 21:13:00,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:00,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:00,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:00,683 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 [2021-10-06 21:13:00,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash 578995135, now seen corresponding path program 1 times [2021-10-06 21:13:00,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:00,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919329926] [2021-10-06 21:13:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:00,687 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:00,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:00,688 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) [2021-10-06 21:13:00,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-06 21:13:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:00,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 21:13:00,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:01,010 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-06 21:13:01,010 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 21 treesize of output 60 [2021-10-06 21:13:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:01,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:01,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:01,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919329926] [2021-10-06 21:13:01,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919329926] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:13:01,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:13:01,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:13:01,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229932251] [2021-10-06 21:13:01,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:13:01,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:13:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:13:01,276 INFO L87 Difference]: Start difference. First operand 144 states and 572 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-06 21:13:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:01,319 INFO L93 Difference]: Finished difference Result 134 states and 536 transitions. [2021-10-06 21:13:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:13:01,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2021-10-06 21:13:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:01,323 INFO L225 Difference]: With dead ends: 134 [2021-10-06 21:13:01,323 INFO L226 Difference]: Without dead ends: 134 [2021-10-06 21:13:01,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:13:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-06 21:13:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-10-06 21:13:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 4.155038759689923) internal successors, (536), 133 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 536 transitions. [2021-10-06 21:13:01,331 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 536 transitions. Word has length 7 [2021-10-06 21:13:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:01,332 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 536 transitions. [2021-10-06 21:13:01,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-06 21:13:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 536 transitions. [2021-10-06 21:13:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-06 21:13:01,333 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:01,333 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:01,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-06 21:13:01,546 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 [2021-10-06 21:13:01,547 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash 578995133, now seen corresponding path program 1 times [2021-10-06 21:13:01,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:01,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999429783] [2021-10-06 21:13:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:01,550 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:01,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:01,551 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) [2021-10-06 21:13:01,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-06 21:13:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:01,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-06 21:13:01,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:01,686 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-06 21:13:01,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-06 21:13:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:01,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:01,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:01,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999429783] [2021-10-06 21:13:01,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999429783] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:13:01,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:13:01,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 21:13:01,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321289841] [2021-10-06 21:13:01,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 21:13:01,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 21:13:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:13:01,756 INFO L87 Difference]: Start difference. First operand 134 states and 536 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) [2021-10-06 21:13:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:01,791 INFO L93 Difference]: Finished difference Result 124 states and 500 transitions. [2021-10-06 21:13:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:13:01,791 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 [2021-10-06 21:13:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:01,793 INFO L225 Difference]: With dead ends: 124 [2021-10-06 21:13:01,794 INFO L226 Difference]: Without dead ends: 124 [2021-10-06 21:13:01,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:13:01,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-06 21:13:01,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-06 21:13:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 121 states have (on average 4.132231404958677) internal successors, (500), 123 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 500 transitions. [2021-10-06 21:13:01,801 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 500 transitions. Word has length 7 [2021-10-06 21:13:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:01,802 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 500 transitions. [2021-10-06 21:13:01,802 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) [2021-10-06 21:13:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 500 transitions. [2021-10-06 21:13:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-06 21:13:01,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:01,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:01,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:02,016 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 [2021-10-06 21:13:02,018 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:02,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1931411757, now seen corresponding path program 1 times [2021-10-06 21:13:02,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:02,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024827614] [2021-10-06 21:13:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:02,020 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:02,021 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) [2021-10-06 21:13:02,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-06 21:13:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:02,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:13:02,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:02,176 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-06 21:13:02,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-06 21:13:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:02,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:02,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:02,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024827614] [2021-10-06 21:13:02,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024827614] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:13:02,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:13:02,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-06 21:13:02,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194116463] [2021-10-06 21:13:02,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 21:13:02,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:02,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 21:13:02,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:13:02,401 INFO L87 Difference]: Start difference. First operand 124 states and 500 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-10-06 21:13:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:02,460 INFO L93 Difference]: Finished difference Result 108 states and 420 transitions. [2021-10-06 21:13:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:13:02,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-06 21:13:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:02,463 INFO L225 Difference]: With dead ends: 108 [2021-10-06 21:13:02,463 INFO L226 Difference]: Without dead ends: 108 [2021-10-06 21:13:02,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:13:02,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-06 21:13:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-06 21:13:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 3.9622641509433962) internal successors, (420), 107 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 420 transitions. [2021-10-06 21:13:02,470 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 420 transitions. Word has length 9 [2021-10-06 21:13:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:02,470 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 420 transitions. [2021-10-06 21:13:02,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-10-06 21:13:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 420 transitions. [2021-10-06 21:13:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-06 21:13:02,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:02,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:02,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:02,688 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 [2021-10-06 21:13:02,692 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:02,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1931411756, now seen corresponding path program 1 times [2021-10-06 21:13:02,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:02,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879617972] [2021-10-06 21:13:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:02,694 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:02,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:02,695 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) [2021-10-06 21:13:02,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-06 21:13:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:02,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-06 21:13:02,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:03,062 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-06 21:13:03,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 83 [2021-10-06 21:13:03,073 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-06 21:13:03,073 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 87 treesize of output 83 [2021-10-06 21:13:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:03,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:04,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:04,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879617972] [2021-10-06 21:13:04,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879617972] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:13:04,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:13:04,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:13:04,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293746800] [2021-10-06 21:13:04,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:13:04,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:04,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:13:04,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:13:04,054 INFO L87 Difference]: Start difference. First operand 108 states and 420 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-10-06 21:13:04,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:04,112 INFO L93 Difference]: Finished difference Result 92 states and 340 transitions. [2021-10-06 21:13:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:13:04,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2021-10-06 21:13:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:04,114 INFO L225 Difference]: With dead ends: 92 [2021-10-06 21:13:04,115 INFO L226 Difference]: Without dead ends: 92 [2021-10-06 21:13:04,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:13:04,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-06 21:13:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-06 21:13:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 91 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 340 transitions. [2021-10-06 21:13:04,120 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 340 transitions. Word has length 9 [2021-10-06 21:13:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:04,121 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 340 transitions. [2021-10-06 21:13:04,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-10-06 21:13:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 340 transitions. [2021-10-06 21:13:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-06 21:13:04,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:04,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:04,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:04,336 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 [2021-10-06 21:13:04,336 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1193927886, now seen corresponding path program 1 times [2021-10-06 21:13:04,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:04,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229750961] [2021-10-06 21:13:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:04,339 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:04,340 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) [2021-10-06 21:13:04,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-06 21:13:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:04,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 21:13:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:04,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:04,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:04,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229750961] [2021-10-06 21:13:04,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229750961] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:13:04,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:13:04,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:13:04,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486821670] [2021-10-06 21:13:04,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:13:04,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:13:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:13:04,961 INFO L87 Difference]: Start difference. First operand 92 states and 340 transitions. Second operand has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:05,012 INFO L93 Difference]: Finished difference Result 181 states and 677 transitions. [2021-10-06 21:13:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:13:05,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-06 21:13:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:05,015 INFO L225 Difference]: With dead ends: 181 [2021-10-06 21:13:05,016 INFO L226 Difference]: Without dead ends: 172 [2021-10-06 21:13:05,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:13:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-06 21:13:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-10-06 21:13:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 3.7953216374269005) internal successors, (649), 171 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 649 transitions. [2021-10-06 21:13:05,025 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 649 transitions. Word has length 21 [2021-10-06 21:13:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:05,026 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 649 transitions. [2021-10-06 21:13:05,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 649 transitions. [2021-10-06 21:13:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 21:13:05,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:05,029 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:05,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:05,242 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 [2021-10-06 21:13:05,242 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:05,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1667204508, now seen corresponding path program 1 times [2021-10-06 21:13:05,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:05,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103526436] [2021-10-06 21:13:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:05,254 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:05,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:05,257 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) [2021-10-06 21:13:05,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-06 21:13:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:13:05,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:05,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:05,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:05,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103526436] [2021-10-06 21:13:05,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103526436] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-06 21:13:05,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 21:13:05,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-06 21:13:05,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004218586] [2021-10-06 21:13:05,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:13:05,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:05,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:13:05,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:13:05,727 INFO L87 Difference]: Start difference. First operand 172 states and 649 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-10-06 21:13:05,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:05,837 INFO L93 Difference]: Finished difference Result 250 states and 895 transitions. [2021-10-06 21:13:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-06 21:13:05,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-06 21:13:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:05,840 INFO L225 Difference]: With dead ends: 250 [2021-10-06 21:13:05,840 INFO L226 Difference]: Without dead ends: 234 [2021-10-06 21:13:05,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-06 21:13:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 216. [2021-10-06 21:13:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.8) internal successors, (817), 215 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 817 transitions. [2021-10-06 21:13:05,852 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 817 transitions. Word has length 22 [2021-10-06 21:13:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:05,852 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 817 transitions. [2021-10-06 21:13:05,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-10-06 21:13:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 817 transitions. [2021-10-06 21:13:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 21:13:05,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:05,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:05,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-06 21:13:06,066 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 [2021-10-06 21:13:06,067 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 170183029, now seen corresponding path program 1 times [2021-10-06 21:13:06,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:06,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766238848] [2021-10-06 21:13:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:06,070 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:06,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:06,071 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) [2021-10-06 21:13:06,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-06 21:13:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:13:06,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:06,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:06,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:06,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766238848] [2021-10-06 21:13:06,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766238848] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:06,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:06,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-06 21:13:06,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077148277] [2021-10-06 21:13:06,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:13:06,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:06,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:13:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:06,567 INFO L87 Difference]: Start difference. First operand 216 states and 817 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:06,912 INFO L93 Difference]: Finished difference Result 468 states and 1737 transitions. [2021-10-06 21:13:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-06 21:13:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-10-06 21:13:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:06,918 INFO L225 Difference]: With dead ends: 468 [2021-10-06 21:13:06,918 INFO L226 Difference]: Without dead ends: 468 [2021-10-06 21:13:06,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:13:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-10-06 21:13:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 296. [2021-10-06 21:13:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 4.138983050847457) internal successors, (1221), 295 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 1221 transitions. [2021-10-06 21:13:06,939 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 1221 transitions. Word has length 22 [2021-10-06 21:13:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:06,939 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 1221 transitions. [2021-10-06 21:13:06,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 1221 transitions. [2021-10-06 21:13:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 21:13:06,941 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:06,942 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:06,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:07,158 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 [2021-10-06 21:13:07,159 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash -18592904, now seen corresponding path program 2 times [2021-10-06 21:13:07,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:07,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842708592] [2021-10-06 21:13:07,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:13:07,161 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:07,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:07,163 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) [2021-10-06 21:13:07,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-06 21:13:07,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:13:07,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:07,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:13:07,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:07,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:07,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:07,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842708592] [2021-10-06 21:13:07,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842708592] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:07,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:07,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-06 21:13:07,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858185740] [2021-10-06 21:13:07,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:13:07,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:13:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:07,731 INFO L87 Difference]: Start difference. First operand 296 states and 1221 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:08,154 INFO L93 Difference]: Finished difference Result 550 states and 2135 transitions. [2021-10-06 21:13:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-06 21:13:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-10-06 21:13:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:08,160 INFO L225 Difference]: With dead ends: 550 [2021-10-06 21:13:08,161 INFO L226 Difference]: Without dead ends: 550 [2021-10-06 21:13:08,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:13:08,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-10-06 21:13:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 366. [2021-10-06 21:13:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 4.331506849315068) internal successors, (1581), 365 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1581 transitions. [2021-10-06 21:13:08,183 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1581 transitions. Word has length 22 [2021-10-06 21:13:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:08,183 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1581 transitions. [2021-10-06 21:13:08,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1581 transitions. [2021-10-06 21:13:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 21:13:08,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:08,186 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:08,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-06 21:13:08,398 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 [2021-10-06 21:13:08,399 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:08,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:08,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1430822598, now seen corresponding path program 1 times [2021-10-06 21:13:08,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:08,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754232325] [2021-10-06 21:13:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:08,401 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:08,402 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) [2021-10-06 21:13:08,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-06 21:13:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:08,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:13:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:08,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:08,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:08,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754232325] [2021-10-06 21:13:08,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754232325] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-06 21:13:08,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 21:13:08,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-06 21:13:08,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998594851] [2021-10-06 21:13:08,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:13:08,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:13:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:13:08,788 INFO L87 Difference]: Start difference. First operand 366 states and 1581 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-10-06 21:13:08,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:08,884 INFO L93 Difference]: Finished difference Result 594 states and 2519 transitions. [2021-10-06 21:13:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-06 21:13:08,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-06 21:13:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:08,891 INFO L225 Difference]: With dead ends: 594 [2021-10-06 21:13:08,891 INFO L226 Difference]: Without dead ends: 572 [2021-10-06 21:13:08,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-10-06 21:13:08,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 474. [2021-10-06 21:13:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 4.509513742071881) internal successors, (2133), 473 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:08,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 2133 transitions. [2021-10-06 21:13:08,915 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 2133 transitions. Word has length 22 [2021-10-06 21:13:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:08,915 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 2133 transitions. [2021-10-06 21:13:08,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-10-06 21:13:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 2133 transitions. [2021-10-06 21:13:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 21:13:08,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:08,919 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:08,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:09,132 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 [2021-10-06 21:13:09,132 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash -116645075, now seen corresponding path program 1 times [2021-10-06 21:13:09,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:09,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973694095] [2021-10-06 21:13:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:09,135 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:09,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:09,136 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) [2021-10-06 21:13:09,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-06 21:13:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:09,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:13:09,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:09,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:09,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:09,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973694095] [2021-10-06 21:13:09,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973694095] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:09,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:09,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-06 21:13:09,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571953387] [2021-10-06 21:13:09,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:13:09,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:09,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:13:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:09,585 INFO L87 Difference]: Start difference. First operand 474 states and 2133 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:09,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:09,928 INFO L93 Difference]: Finished difference Result 1650 states and 7202 transitions. [2021-10-06 21:13:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-06 21:13:09,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2021-10-06 21:13:09,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:09,947 INFO L225 Difference]: With dead ends: 1650 [2021-10-06 21:13:09,947 INFO L226 Difference]: Without dead ends: 1650 [2021-10-06 21:13:09,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:13:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-10-06 21:13:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 740. [2021-10-06 21:13:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 4.912043301759134) internal successors, (3630), 739 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 3630 transitions. [2021-10-06 21:13:09,998 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 3630 transitions. Word has length 22 [2021-10-06 21:13:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:10,016 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 3630 transitions. [2021-10-06 21:13:10,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 3630 transitions. [2021-10-06 21:13:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-06 21:13:10,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:10,020 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:10,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:10,240 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 [2021-10-06 21:13:10,241 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:10,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1166390104, now seen corresponding path program 2 times [2021-10-06 21:13:10,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:10,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821030929] [2021-10-06 21:13:10,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:13:10,244 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:10,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:10,245 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) [2021-10-06 21:13:10,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-06 21:13:10,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:13:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:10,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:13:10,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:10,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:10,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:10,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821030929] [2021-10-06 21:13:10,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821030929] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:10,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:10,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-06 21:13:10,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413830438] [2021-10-06 21:13:10,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:13:10,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:10,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:13:10,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:10,732 INFO L87 Difference]: Start difference. First operand 740 states and 3630 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:11,111 INFO L93 Difference]: Finished difference Result 1892 states and 8522 transitions. [2021-10-06 21:13:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-06 21:13:11,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2021-10-06 21:13:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:11,133 INFO L225 Difference]: With dead ends: 1892 [2021-10-06 21:13:11,133 INFO L226 Difference]: Without dead ends: 1892 [2021-10-06 21:13:11,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:13:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-10-06 21:13:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 970. [2021-10-06 21:13:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 5.123839009287925) internal successors, (4965), 969 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 4965 transitions. [2021-10-06 21:13:11,194 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 4965 transitions. Word has length 22 [2021-10-06 21:13:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:11,195 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 4965 transitions. [2021-10-06 21:13:11,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 4965 transitions. [2021-10-06 21:13:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:13:11,201 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:11,201 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:11,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-06 21:13:11,414 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 [2021-10-06 21:13:11,415 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash -4114987, now seen corresponding path program 1 times [2021-10-06 21:13:11,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:11,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301332146] [2021-10-06 21:13:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:11,417 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:11,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:11,418 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) [2021-10-06 21:13:11,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-06 21:13:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:11,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:13:11,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:12,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:12,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:12,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301332146] [2021-10-06 21:13:12,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301332146] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:12,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:12,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-06 21:13:12,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907900682] [2021-10-06 21:13:12,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:13:12,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:12,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:13:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:12,332 INFO L87 Difference]: Start difference. First operand 970 states and 4965 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:12,561 INFO L93 Difference]: Finished difference Result 1200 states and 5728 transitions. [2021-10-06 21:13:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-06 21:13:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:13:12,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:12,575 INFO L225 Difference]: With dead ends: 1200 [2021-10-06 21:13:12,575 INFO L226 Difference]: Without dead ends: 1170 [2021-10-06 21:13:12,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-10-06 21:13:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1062. [2021-10-06 21:13:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 5.04995287464656) internal successors, (5358), 1061 states have internal predecessors, (5358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 5358 transitions. [2021-10-06 21:13:12,628 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 5358 transitions. Word has length 23 [2021-10-06 21:13:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:12,628 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 5358 transitions. [2021-10-06 21:13:12,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 5358 transitions. [2021-10-06 21:13:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:13:12,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:12,635 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:12,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:12,849 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 [2021-10-06 21:13:12,849 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:12,850 INFO L82 PathProgramCache]: Analyzing trace with hash -85316785, now seen corresponding path program 2 times [2021-10-06 21:13:12,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:12,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932872863] [2021-10-06 21:13:12,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:13:12,852 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:12,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:12,853 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) [2021-10-06 21:13:12,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-06 21:13:13,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:13:13,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:13,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:13:13,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:13,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:13,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:13,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932872863] [2021-10-06 21:13:13,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932872863] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:13,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:13,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-06 21:13:13,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361972475] [2021-10-06 21:13:13,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:13:13,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:13,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:13:13,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:13,869 INFO L87 Difference]: Start difference. First operand 1062 states and 5358 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:14,043 INFO L93 Difference]: Finished difference Result 1280 states and 6092 transitions. [2021-10-06 21:13:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-06 21:13:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:13:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:14,058 INFO L225 Difference]: With dead ends: 1280 [2021-10-06 21:13:14,058 INFO L226 Difference]: Without dead ends: 1250 [2021-10-06 21:13:14,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-10-06 21:13:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1136. [2021-10-06 21:13:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 5.0123348017621145) internal successors, (5689), 1135 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 5689 transitions. [2021-10-06 21:13:14,113 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 5689 transitions. Word has length 23 [2021-10-06 21:13:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:14,113 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 5689 transitions. [2021-10-06 21:13:14,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 5689 transitions. [2021-10-06 21:13:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:13:14,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:14,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:14,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:14,334 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 [2021-10-06 21:13:14,334 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash -542233529, now seen corresponding path program 1 times [2021-10-06 21:13:14,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:14,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919841533] [2021-10-06 21:13:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:13:14,335 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:14,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:14,337 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) [2021-10-06 21:13:14,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-06 21:13:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:13:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:15,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:15,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:15,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919841533] [2021-10-06 21:13:15,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919841533] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:15,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:15,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-06 21:13:15,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512033514] [2021-10-06 21:13:15,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:13:15,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:15,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:13:15,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:15,353 INFO L87 Difference]: Start difference. First operand 1136 states and 5689 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:15,612 INFO L93 Difference]: Finished difference Result 1432 states and 6673 transitions. [2021-10-06 21:13:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-06 21:13:15,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:13:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:15,626 INFO L225 Difference]: With dead ends: 1432 [2021-10-06 21:13:15,627 INFO L226 Difference]: Without dead ends: 1382 [2021-10-06 21:13:15,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-10-06 21:13:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1242. [2021-10-06 21:13:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 4.946011281224819) internal successors, (6138), 1241 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 6138 transitions. [2021-10-06 21:13:15,680 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 6138 transitions. Word has length 23 [2021-10-06 21:13:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:15,680 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 6138 transitions. [2021-10-06 21:13:15,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 6138 transitions. [2021-10-06 21:13:15,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-06 21:13:15,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:15,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:15,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:15,902 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 [2021-10-06 21:13:15,902 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:15,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1876768377, now seen corresponding path program 2 times [2021-10-06 21:13:15,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:15,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146827278] [2021-10-06 21:13:15,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:13:15,905 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:15,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:15,906 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) [2021-10-06 21:13:15,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-06 21:13:16,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:13:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:13:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:16,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:16,990 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:16,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146827278] [2021-10-06 21:13:16,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146827278] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:16,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:16,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-06 21:13:16,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036878791] [2021-10-06 21:13:16,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:13:16,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:13:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:16,992 INFO L87 Difference]: Start difference. First operand 1242 states and 6138 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:17,217 INFO L93 Difference]: Finished difference Result 1518 states and 7059 transitions. [2021-10-06 21:13:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-06 21:13:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-06 21:13:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:17,251 INFO L225 Difference]: With dead ends: 1518 [2021-10-06 21:13:17,252 INFO L226 Difference]: Without dead ends: 1468 [2021-10-06 21:13:17,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:13:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-10-06 21:13:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1304. [2021-10-06 21:13:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 4.927858787413661) internal successors, (6421), 1303 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 6421 transitions. [2021-10-06 21:13:17,329 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 6421 transitions. Word has length 23 [2021-10-06 21:13:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:17,330 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 6421 transitions. [2021-10-06 21:13:17,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 6421 transitions. [2021-10-06 21:13:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:17,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:17,337 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:17,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:17,550 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 [2021-10-06 21:13:17,550 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1112386187, now seen corresponding path program 3 times [2021-10-06 21:13:17,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:17,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666509787] [2021-10-06 21:13:17,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:13:17,553 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:17,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:17,554 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) [2021-10-06 21:13:17,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-06 21:13:17,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:13:17,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:17,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:17,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:18,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:18,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:18,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666509787] [2021-10-06 21:13:18,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666509787] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:18,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:18,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:18,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696056570] [2021-10-06 21:13:18,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:18,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:18,516 INFO L87 Difference]: Start difference. First operand 1304 states and 6421 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:19,771 INFO L93 Difference]: Finished difference Result 2356 states and 10599 transitions. [2021-10-06 21:13:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:13:19,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:19,782 INFO L225 Difference]: With dead ends: 2356 [2021-10-06 21:13:19,782 INFO L226 Difference]: Without dead ends: 2322 [2021-10-06 21:13:19,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 675.8ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:13:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-10-06 21:13:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1762. [2021-10-06 21:13:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 4.887563884156729) internal successors, (8607), 1761 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 8607 transitions. [2021-10-06 21:13:19,896 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 8607 transitions. Word has length 24 [2021-10-06 21:13:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:19,897 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 8607 transitions. [2021-10-06 21:13:19,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 8607 transitions. [2021-10-06 21:13:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:19,904 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:19,905 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:19,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:20,118 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 [2021-10-06 21:13:20,118 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:20,119 INFO L82 PathProgramCache]: Analyzing trace with hash -194925951, now seen corresponding path program 4 times [2021-10-06 21:13:20,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:20,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736204066] [2021-10-06 21:13:20,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:13:20,121 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:20,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:20,122 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) [2021-10-06 21:13:20,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-06 21:13:20,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:13:20,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:20,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:20,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:20,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:21,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:21,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736204066] [2021-10-06 21:13:21,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736204066] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:21,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:21,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:21,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435735402] [2021-10-06 21:13:21,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:21,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:21,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:21,136 INFO L87 Difference]: Start difference. First operand 1762 states and 8607 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:22,497 INFO L93 Difference]: Finished difference Result 2792 states and 12818 transitions. [2021-10-06 21:13:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 21:13:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:22,512 INFO L225 Difference]: With dead ends: 2792 [2021-10-06 21:13:22,512 INFO L226 Difference]: Without dead ends: 2766 [2021-10-06 21:13:22,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 810.4ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:13:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-10-06 21:13:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1924. [2021-10-06 21:13:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 4.965158606344254) internal successors, (9548), 1923 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 9548 transitions. [2021-10-06 21:13:22,630 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 9548 transitions. Word has length 24 [2021-10-06 21:13:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:22,631 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 9548 transitions. [2021-10-06 21:13:22,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 9548 transitions. [2021-10-06 21:13:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:22,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:22,639 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:22,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:22,852 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 [2021-10-06 21:13:22,852 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash 288800017, now seen corresponding path program 5 times [2021-10-06 21:13:22,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:22,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261348762] [2021-10-06 21:13:22,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:13:22,855 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:22,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:22,856 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) [2021-10-06 21:13:22,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-06 21:13:23,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:13:23,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:13:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:23,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:23,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:23,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261348762] [2021-10-06 21:13:23,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261348762] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:23,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:23,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:23,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436172123] [2021-10-06 21:13:23,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:23,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:23,970 INFO L87 Difference]: Start difference. First operand 1924 states and 9548 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:27,106 INFO L93 Difference]: Finished difference Result 3756 states and 17459 transitions. [2021-10-06 21:13:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:13:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:27,131 INFO L225 Difference]: With dead ends: 3756 [2021-10-06 21:13:27,131 INFO L226 Difference]: Without dead ends: 3756 [2021-10-06 21:13:27,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1353.9ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:13:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2021-10-06 21:13:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 2178. [2021-10-06 21:13:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 5.160312356453836) internal successors, (11234), 2177 states have internal predecessors, (11234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 11234 transitions. [2021-10-06 21:13:27,271 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 11234 transitions. Word has length 24 [2021-10-06 21:13:27,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:27,271 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 11234 transitions. [2021-10-06 21:13:27,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 11234 transitions. [2021-10-06 21:13:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:27,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:27,280 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:27,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:27,493 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 [2021-10-06 21:13:27,493 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:27,494 INFO L82 PathProgramCache]: Analyzing trace with hash 665325371, now seen corresponding path program 6 times [2021-10-06 21:13:27,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:27,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413149673] [2021-10-06 21:13:27,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:13:27,495 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:27,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:27,496 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) [2021-10-06 21:13:27,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-06 21:13:27,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:13:27,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:28,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:28,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:28,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413149673] [2021-10-06 21:13:28,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413149673] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:28,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:28,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:28,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467590375] [2021-10-06 21:13:28,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:28,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:28,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:28,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:28,556 INFO L87 Difference]: Start difference. First operand 2178 states and 11234 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:30,130 INFO L93 Difference]: Finished difference Result 3328 states and 15828 transitions. [2021-10-06 21:13:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 21:13:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:30,152 INFO L225 Difference]: With dead ends: 3328 [2021-10-06 21:13:30,152 INFO L226 Difference]: Without dead ends: 3302 [2021-10-06 21:13:30,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 763.2ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:13:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-10-06 21:13:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 2318. [2021-10-06 21:13:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 5.205438066465256) internal successors, (12061), 2317 states have internal predecessors, (12061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 12061 transitions. [2021-10-06 21:13:30,300 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 12061 transitions. Word has length 24 [2021-10-06 21:13:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:30,300 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 12061 transitions. [2021-10-06 21:13:30,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 12061 transitions. [2021-10-06 21:13:30,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:30,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:30,312 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:30,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-06 21:13:30,526 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 [2021-10-06 21:13:30,526 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:30,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1149051339, now seen corresponding path program 7 times [2021-10-06 21:13:30,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:30,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601206362] [2021-10-06 21:13:30,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:13:30,528 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:30,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:30,529 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) [2021-10-06 21:13:30,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-06 21:13:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:30,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:31,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:31,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:31,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601206362] [2021-10-06 21:13:31,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601206362] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:31,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:31,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:31,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457163260] [2021-10-06 21:13:31,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:31,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:31,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:31,619 INFO L87 Difference]: Start difference. First operand 2318 states and 12061 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:33,358 INFO L93 Difference]: Finished difference Result 4026 states and 19228 transitions. [2021-10-06 21:13:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 21:13:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:33,378 INFO L225 Difference]: With dead ends: 4026 [2021-10-06 21:13:33,379 INFO L226 Difference]: Without dead ends: 4026 [2021-10-06 21:13:33,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 933.5ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:13:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-10-06 21:13:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2482. [2021-10-06 21:13:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 5.255945183393793) internal successors, (13040), 2481 states have internal predecessors, (13040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 13040 transitions. [2021-10-06 21:13:33,511 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 13040 transitions. Word has length 24 [2021-10-06 21:13:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:33,511 INFO L470 AbstractCegarLoop]: Abstraction has 2482 states and 13040 transitions. [2021-10-06 21:13:33,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 13040 transitions. [2021-10-06 21:13:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:33,522 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:33,522 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:33,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-06 21:13:33,735 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 [2021-10-06 21:13:33,736 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:33,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2000210152, now seen corresponding path program 8 times [2021-10-06 21:13:33,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:33,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225852360] [2021-10-06 21:13:33,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:13:33,738 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:33,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:33,739 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) [2021-10-06 21:13:33,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-06 21:13:34,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:13:34,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:34,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:34,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:34,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:34,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:34,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225852360] [2021-10-06 21:13:34,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225852360] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:34,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:34,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:34,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62060775] [2021-10-06 21:13:34,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:34,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:34,822 INFO L87 Difference]: Start difference. First operand 2482 states and 13040 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:36,128 INFO L93 Difference]: Finished difference Result 3304 states and 16337 transitions. [2021-10-06 21:13:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 21:13:36,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:36,145 INFO L225 Difference]: With dead ends: 3304 [2021-10-06 21:13:36,145 INFO L226 Difference]: Without dead ends: 3280 [2021-10-06 21:13:36,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 673.2ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:13:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-10-06 21:13:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2752. [2021-10-06 21:13:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 5.199563794983642) internal successors, (14304), 2751 states have internal predecessors, (14304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 14304 transitions. [2021-10-06 21:13:36,279 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 14304 transitions. Word has length 24 [2021-10-06 21:13:36,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:36,280 INFO L470 AbstractCegarLoop]: Abstraction has 2752 states and 14304 transitions. [2021-10-06 21:13:36,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 14304 transitions. [2021-10-06 21:13:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:36,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:36,291 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:36,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:36,505 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 [2021-10-06 21:13:36,506 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:36,507 INFO L82 PathProgramCache]: Analyzing trace with hash -850573715, now seen corresponding path program 3 times [2021-10-06 21:13:36,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:36,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135595284] [2021-10-06 21:13:36,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:13:36,508 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:36,509 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) [2021-10-06 21:13:36,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-06 21:13:36,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:13:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:37,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:37,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:37,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135595284] [2021-10-06 21:13:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135595284] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:37,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:37,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:37,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506996153] [2021-10-06 21:13:37,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:37,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:37,435 INFO L87 Difference]: Start difference. First operand 2752 states and 14304 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:38,842 INFO L93 Difference]: Finished difference Result 6552 states and 30265 transitions. [2021-10-06 21:13:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:13:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:38,869 INFO L225 Difference]: With dead ends: 6552 [2021-10-06 21:13:38,870 INFO L226 Difference]: Without dead ends: 6524 [2021-10-06 21:13:38,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 729.3ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:13:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6524 states. [2021-10-06 21:13:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6524 to 4172. [2021-10-06 21:13:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 4171 states have (on average 5.067130184608008) internal successors, (21135), 4171 states have internal predecessors, (21135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 21135 transitions. [2021-10-06 21:13:39,127 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 21135 transitions. Word has length 24 [2021-10-06 21:13:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:39,128 INFO L470 AbstractCegarLoop]: Abstraction has 4172 states and 21135 transitions. [2021-10-06 21:13:39,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 21135 transitions. [2021-10-06 21:13:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:39,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:39,153 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:39,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:39,367 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 [2021-10-06 21:13:39,368 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:39,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1383001126, now seen corresponding path program 4 times [2021-10-06 21:13:39,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:39,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247630686] [2021-10-06 21:13:39,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:13:39,370 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:39,371 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) [2021-10-06 21:13:39,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-06 21:13:39,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:13:39,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:39,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:39,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:39,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:40,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:40,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247630686] [2021-10-06 21:13:40,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247630686] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:40,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:40,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:40,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080341386] [2021-10-06 21:13:40,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:40,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:40,233 INFO L87 Difference]: Start difference. First operand 4172 states and 21135 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:41,457 INFO L93 Difference]: Finished difference Result 6688 states and 32015 transitions. [2021-10-06 21:13:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 21:13:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:41,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:41,483 INFO L225 Difference]: With dead ends: 6688 [2021-10-06 21:13:41,484 INFO L226 Difference]: Without dead ends: 6666 [2021-10-06 21:13:41,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 569.8ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:13:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2021-10-06 21:13:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 4566. [2021-10-06 21:13:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4565 states have (on average 5.147864184008762) internal successors, (23500), 4565 states have internal predecessors, (23500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 23500 transitions. [2021-10-06 21:13:41,699 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 23500 transitions. Word has length 24 [2021-10-06 21:13:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:41,700 INFO L470 AbstractCegarLoop]: Abstraction has 4566 states and 23500 transitions. [2021-10-06 21:13:41,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 23500 transitions. [2021-10-06 21:13:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:41,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:41,721 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:41,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:41,934 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 [2021-10-06 21:13:41,934 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash -983577990, now seen corresponding path program 5 times [2021-10-06 21:13:41,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:41,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198526068] [2021-10-06 21:13:41,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:13:41,936 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:41,938 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) [2021-10-06 21:13:41,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-06 21:13:42,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:13:42,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:42,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:13:42,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:42,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:42,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:42,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198526068] [2021-10-06 21:13:42,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198526068] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:42,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:42,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:42,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961502700] [2021-10-06 21:13:42,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:42,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:42,889 INFO L87 Difference]: Start difference. First operand 4566 states and 23500 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:44,721 INFO L93 Difference]: Finished difference Result 10856 states and 51135 transitions. [2021-10-06 21:13:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:13:44,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:44,825 INFO L225 Difference]: With dead ends: 10856 [2021-10-06 21:13:44,826 INFO L226 Difference]: Without dead ends: 10856 [2021-10-06 21:13:44,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1056.9ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:13:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10856 states. [2021-10-06 21:13:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10856 to 5162. [2021-10-06 21:13:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 5161 states have (on average 5.280178260027126) internal successors, (27251), 5161 states have internal predecessors, (27251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 27251 transitions. [2021-10-06 21:13:45,209 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 27251 transitions. Word has length 24 [2021-10-06 21:13:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:45,209 INFO L470 AbstractCegarLoop]: Abstraction has 5162 states and 27251 transitions. [2021-10-06 21:13:45,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 27251 transitions. [2021-10-06 21:13:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:45,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:45,249 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:45,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:45,449 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 [2021-10-06 21:13:45,450 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:45,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:45,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1871308936, now seen corresponding path program 6 times [2021-10-06 21:13:45,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:45,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446558574] [2021-10-06 21:13:45,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:13:45,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:45,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:45,465 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) [2021-10-06 21:13:45,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-06 21:13:45,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:13:45,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:45,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:45,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:46,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:46,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:46,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446558574] [2021-10-06 21:13:46,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446558574] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:46,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:46,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:46,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609144822] [2021-10-06 21:13:46,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:46,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:46,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:46,505 INFO L87 Difference]: Start difference. First operand 5162 states and 27251 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:47,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:47,788 INFO L93 Difference]: Finished difference Result 8922 states and 43494 transitions. [2021-10-06 21:13:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:13:47,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:47,827 INFO L225 Difference]: With dead ends: 8922 [2021-10-06 21:13:47,828 INFO L226 Difference]: Without dead ends: 8906 [2021-10-06 21:13:47,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 699.6ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:13:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8906 states. [2021-10-06 21:13:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8906 to 6048. [2021-10-06 21:13:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6048 states, 6047 states have (on average 5.2515296841408965) internal successors, (31756), 6047 states have internal predecessors, (31756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6048 states to 6048 states and 31756 transitions. [2021-10-06 21:13:48,204 INFO L78 Accepts]: Start accepts. Automaton has 6048 states and 31756 transitions. Word has length 24 [2021-10-06 21:13:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:48,204 INFO L470 AbstractCegarLoop]: Abstraction has 6048 states and 31756 transitions. [2021-10-06 21:13:48,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6048 states and 31756 transitions. [2021-10-06 21:13:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:48,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:48,223 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:48,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:48,423 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 [2021-10-06 21:13:48,424 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1521800372, now seen corresponding path program 7 times [2021-10-06 21:13:48,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:48,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51109571] [2021-10-06 21:13:48,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:13:48,426 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:48,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:48,427 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) [2021-10-06 21:13:48,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-06 21:13:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:13:48,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:48,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:49,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:49,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:49,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51109571] [2021-10-06 21:13:49,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51109571] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:49,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:49,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:49,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114191760] [2021-10-06 21:13:49,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:49,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:49,323 INFO L87 Difference]: Start difference. First operand 6048 states and 31756 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:50,906 INFO L93 Difference]: Finished difference Result 9412 states and 46356 transitions. [2021-10-06 21:13:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 21:13:50,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:50,946 INFO L225 Difference]: With dead ends: 9412 [2021-10-06 21:13:50,946 INFO L226 Difference]: Without dead ends: 9390 [2021-10-06 21:13:50,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 761.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:13:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9390 states. [2021-10-06 21:13:51,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9390 to 6404. [2021-10-06 21:13:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6404 states, 6403 states have (on average 5.30392003748243) internal successors, (33961), 6403 states have internal predecessors, (33961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6404 states to 6404 states and 33961 transitions. [2021-10-06 21:13:51,255 INFO L78 Accepts]: Start accepts. Automaton has 6404 states and 33961 transitions. Word has length 24 [2021-10-06 21:13:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:51,255 INFO L470 AbstractCegarLoop]: Abstraction has 6404 states and 33961 transitions. [2021-10-06 21:13:51,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6404 states and 33961 transitions. [2021-10-06 21:13:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-06 21:13:51,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:51,275 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:51,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:51,481 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 [2021-10-06 21:13:51,482 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -844778744, now seen corresponding path program 8 times [2021-10-06 21:13:51,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:51,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897425581] [2021-10-06 21:13:51,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:13:51,483 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:51,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:51,484 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) [2021-10-06 21:13:51,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-06 21:13:51,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:13:51,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:51,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:51,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:52,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:52,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:52,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897425581] [2021-10-06 21:13:52,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897425581] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:52,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:52,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-06 21:13:52,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375925902] [2021-10-06 21:13:52,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:13:52,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:13:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:13:52,489 INFO L87 Difference]: Start difference. First operand 6404 states and 33961 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:13:54,576 INFO L93 Difference]: Finished difference Result 14018 states and 67041 transitions. [2021-10-06 21:13:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:13:54,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-06 21:13:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:13:54,652 INFO L225 Difference]: With dead ends: 14018 [2021-10-06 21:13:54,652 INFO L226 Difference]: Without dead ends: 14018 [2021-10-06 21:13:54,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 975.5ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:13:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14018 states. [2021-10-06 21:13:54,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14018 to 6754. [2021-10-06 21:13:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6754 states, 6753 states have (on average 5.371094328446616) internal successors, (36271), 6753 states have internal predecessors, (36271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6754 states to 6754 states and 36271 transitions. [2021-10-06 21:13:55,005 INFO L78 Accepts]: Start accepts. Automaton has 6754 states and 36271 transitions. Word has length 24 [2021-10-06 21:13:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:13:55,005 INFO L470 AbstractCegarLoop]: Abstraction has 6754 states and 36271 transitions. [2021-10-06 21:13:55,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:13:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 6754 states and 36271 transitions. [2021-10-06 21:13:55,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:13:55,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:13:55,026 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:13:55,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-06 21:13:55,226 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 [2021-10-06 21:13:55,227 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:13:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:13:55,228 INFO L82 PathProgramCache]: Analyzing trace with hash -932652178, now seen corresponding path program 9 times [2021-10-06 21:13:55,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:13:55,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310829868] [2021-10-06 21:13:55,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:13:55,229 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:13:55,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:13:55,230 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) [2021-10-06 21:13:55,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-06 21:13:55,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:13:55,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:13:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:13:55,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:13:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:56,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:13:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:13:56,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:13:56,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310829868] [2021-10-06 21:13:56,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310829868] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:13:56,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:13:56,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:13:56,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473876083] [2021-10-06 21:13:56,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:13:56,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:13:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:13:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:13:56,864 INFO L87 Difference]: Start difference. First operand 6754 states and 36271 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:14:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:14:01,615 INFO L93 Difference]: Finished difference Result 7182 states and 37715 transitions. [2021-10-06 21:14:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:14:01,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:14:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:14:01,665 INFO L225 Difference]: With dead ends: 7182 [2021-10-06 21:14:01,665 INFO L226 Difference]: Without dead ends: 7152 [2021-10-06 21:14:01,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:14:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2021-10-06 21:14:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 6838. [2021-10-06 21:14:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 5.361562088635367) internal successors, (36657), 6837 states have internal predecessors, (36657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:14:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 36657 transitions. [2021-10-06 21:14:02,037 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 36657 transitions. Word has length 25 [2021-10-06 21:14:02,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:14:02,037 INFO L470 AbstractCegarLoop]: Abstraction has 6838 states and 36657 transitions. [2021-10-06 21:14:02,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:14:02,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 36657 transitions. [2021-10-06 21:14:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:14:02,069 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:14:02,070 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:14:02,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-06 21:14:02,285 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 [2021-10-06 21:14:02,285 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:14:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:14:02,286 INFO L82 PathProgramCache]: Analyzing trace with hash -783643282, now seen corresponding path program 10 times [2021-10-06 21:14:02,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:14:02,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514839250] [2021-10-06 21:14:02,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:14:02,288 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:14:02,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:14:02,289 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) [2021-10-06 21:14:02,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-06 21:14:02,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:14:02,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:14:02,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:14:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:14:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:14:05,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:14:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:14:05,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:14:05,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514839250] [2021-10-06 21:14:05,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514839250] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:14:05,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:14:05,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:14:05,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701904852] [2021-10-06 21:14:05,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:14:05,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:14:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:14:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-06 21:14:05,760 INFO L87 Difference]: Start difference. First operand 6838 states and 36657 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:14:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:14:34,758 INFO L93 Difference]: Finished difference Result 7476 states and 38907 transitions. [2021-10-06 21:14:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:14:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:14:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:14:34,810 INFO L225 Difference]: With dead ends: 7476 [2021-10-06 21:14:34,811 INFO L226 Difference]: Without dead ends: 7446 [2021-10-06 21:14:34,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2316.0ms TimeCoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-06 21:14:34,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7446 states. [2021-10-06 21:14:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7446 to 6972. [2021-10-06 21:14:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6972 states, 6971 states have (on average 5.3616410844928994) internal successors, (37376), 6971 states have internal predecessors, (37376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:14:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 37376 transitions. [2021-10-06 21:14:35,120 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 37376 transitions. Word has length 25 [2021-10-06 21:14:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:14:35,121 INFO L470 AbstractCegarLoop]: Abstraction has 6972 states and 37376 transitions. [2021-10-06 21:14:35,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:14:35,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 37376 transitions. [2021-10-06 21:14:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:14:35,155 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:14:35,155 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:14:35,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-06 21:14:35,369 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 [2021-10-06 21:14:35,369 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:14:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:14:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1887155377, now seen corresponding path program 11 times [2021-10-06 21:14:35,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:14:35,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500890131] [2021-10-06 21:14:35,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:14:35,371 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:14:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:14:35,372 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) [2021-10-06 21:14:35,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-06 21:14:35,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-06 21:14:35,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:14:35,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:14:35,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:14:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:14:36,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:14:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:14:36,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:14:36,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500890131] [2021-10-06 21:14:36,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500890131] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:14:36,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:14:36,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-06 21:14:36,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330384919] [2021-10-06 21:14:36,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:14:36,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:14:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:14:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:14:36,892 INFO L87 Difference]: Start difference. First operand 6972 states and 37376 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-10-06 21:14:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:14:38,851 INFO L93 Difference]: Finished difference Result 13220 states and 66487 transitions. [2021-10-06 21:14:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-06 21:14:38,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-10-06 21:14:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:14:38,953 INFO L225 Difference]: With dead ends: 13220 [2021-10-06 21:14:38,953 INFO L226 Difference]: Without dead ends: 13220 [2021-10-06 21:14:38,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1065.8ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:14:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13220 states. [2021-10-06 21:14:39,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13220 to 8234. [2021-10-06 21:14:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8234 states, 8233 states have (on average 5.572452326005101) internal successors, (45878), 8233 states have internal predecessors, (45878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:14:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8234 states to 8234 states and 45878 transitions. [2021-10-06 21:14:39,567 INFO L78 Accepts]: Start accepts. Automaton has 8234 states and 45878 transitions. Word has length 25 [2021-10-06 21:14:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:14:39,568 INFO L470 AbstractCegarLoop]: Abstraction has 8234 states and 45878 transitions. [2021-10-06 21:14:39,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-10-06 21:14:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8234 states and 45878 transitions. [2021-10-06 21:14:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:14:39,663 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:14:39,663 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:14:39,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-06 21:14:39,869 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 [2021-10-06 21:14:39,870 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:14:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:14:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1743046586, now seen corresponding path program 12 times [2021-10-06 21:14:39,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:14:39,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885699390] [2021-10-06 21:14:39,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:14:39,873 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:14:39,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:14:39,874 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:14:39,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-06 21:14:40,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:14:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:14:40,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:14:40,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:14:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:14:43,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:14:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:14:43,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:14:43,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885699390] [2021-10-06 21:14:43,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885699390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:14:43,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:14:43,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:14:43,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010664298] [2021-10-06 21:14:43,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:14:43,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:14:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:14:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-06 21:14:43,483 INFO L87 Difference]: Start difference. First operand 8234 states and 45878 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:12,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:12,516 INFO L93 Difference]: Finished difference Result 8648 states and 47059 transitions. [2021-10-06 21:15:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:15:12,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:15:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:12,570 INFO L225 Difference]: With dead ends: 8648 [2021-10-06 21:15:12,570 INFO L226 Difference]: Without dead ends: 8618 [2021-10-06 21:15:12,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2270.6ms TimeCoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-06 21:15:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8618 states. [2021-10-06 21:15:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8618 to 8220. [2021-10-06 21:15:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8220 states, 8219 states have (on average 5.57221073123251) internal successors, (45798), 8219 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8220 states to 8220 states and 45798 transitions. [2021-10-06 21:15:13,127 INFO L78 Accepts]: Start accepts. Automaton has 8220 states and 45798 transitions. Word has length 25 [2021-10-06 21:15:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:13,128 INFO L470 AbstractCegarLoop]: Abstraction has 8220 states and 45798 transitions. [2021-10-06 21:15:13,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 8220 states and 45798 transitions. [2021-10-06 21:15:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:13,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:13,195 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:13,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:13,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:13,410 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1509824713, now seen corresponding path program 13 times [2021-10-06 21:15:13,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:13,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245250964] [2021-10-06 21:15:13,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:15:13,413 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:13,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:13,414 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:13,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-06 21:15:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:15:14,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:15:14,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:14,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:14,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:14,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245250964] [2021-10-06 21:15:14,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245250964] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:14,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:14,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-06 21:15:14,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886340281] [2021-10-06 21:15:14,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:15:14,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:15:14,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:15:14,965 INFO L87 Difference]: Start difference. First operand 8220 states and 45798 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-10-06 21:15:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:17,470 INFO L93 Difference]: Finished difference Result 13294 states and 69301 transitions. [2021-10-06 21:15:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-06 21:15:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-10-06 21:15:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:17,525 INFO L225 Difference]: With dead ends: 13294 [2021-10-06 21:15:17,526 INFO L226 Difference]: Without dead ends: 13294 [2021-10-06 21:15:17,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1305.1ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:15:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13294 states. [2021-10-06 21:15:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13294 to 8534. [2021-10-06 21:15:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 8533 states have (on average 5.58642915738896) internal successors, (47669), 8533 states have internal predecessors, (47669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 47669 transitions. [2021-10-06 21:15:17,998 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 47669 transitions. Word has length 25 [2021-10-06 21:15:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:17,998 INFO L470 AbstractCegarLoop]: Abstraction has 8534 states and 47669 transitions. [2021-10-06 21:15:17,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-10-06 21:15:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 47669 transitions. [2021-10-06 21:15:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:18,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:18,024 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:18,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:18,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:18,233 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash -946434166, now seen corresponding path program 14 times [2021-10-06 21:15:18,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:18,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431132991] [2021-10-06 21:15:18,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:15:18,236 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:18,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:18,237 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:18,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-06 21:15:18,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:15:18,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:15:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:15:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:19,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:19,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:19,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431132991] [2021-10-06 21:15:19,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431132991] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:19,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:19,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:15:19,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397746316] [2021-10-06 21:15:19,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:15:19,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:19,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:15:19,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:19,823 INFO L87 Difference]: Start difference. First operand 8534 states and 47669 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:24,627 INFO L93 Difference]: Finished difference Result 9146 states and 50070 transitions. [2021-10-06 21:15:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:15:24,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:15:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:24,663 INFO L225 Difference]: With dead ends: 9146 [2021-10-06 21:15:24,663 INFO L226 Difference]: Without dead ends: 9116 [2021-10-06 21:15:24,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-10-06 21:15:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8796. [2021-10-06 21:15:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 8795 states have (on average 5.578510517339398) internal successors, (49063), 8795 states have internal predecessors, (49063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 49063 transitions. [2021-10-06 21:15:25,096 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 49063 transitions. Word has length 25 [2021-10-06 21:15:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:25,097 INFO L470 AbstractCegarLoop]: Abstraction has 8796 states and 49063 transitions. [2021-10-06 21:15:25,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 49063 transitions. [2021-10-06 21:15:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:25,131 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:25,131 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:25,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:25,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:25,346 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2007923954, now seen corresponding path program 1 times [2021-10-06 21:15:25,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:25,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773530951] [2021-10-06 21:15:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:15:25,348 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:25,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:25,349 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:25,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-06 21:15:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:15:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:15:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:26,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:27,073 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:27,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773530951] [2021-10-06 21:15:27,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773530951] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:27,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:27,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:15:27,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030391113] [2021-10-06 21:15:27,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:15:27,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:15:27,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:27,075 INFO L87 Difference]: Start difference. First operand 8796 states and 49063 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:27,807 INFO L93 Difference]: Finished difference Result 10292 states and 55483 transitions. [2021-10-06 21:15:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:15:27,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:15:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:27,848 INFO L225 Difference]: With dead ends: 10292 [2021-10-06 21:15:27,848 INFO L226 Difference]: Without dead ends: 10192 [2021-10-06 21:15:27,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10192 states. [2021-10-06 21:15:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10192 to 9356. [2021-10-06 21:15:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9356 states, 9355 states have (on average 5.59166221272047) internal successors, (52310), 9355 states have internal predecessors, (52310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9356 states to 9356 states and 52310 transitions. [2021-10-06 21:15:28,343 INFO L78 Accepts]: Start accepts. Automaton has 9356 states and 52310 transitions. Word has length 25 [2021-10-06 21:15:28,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:28,343 INFO L470 AbstractCegarLoop]: Abstraction has 9356 states and 52310 transitions. [2021-10-06 21:15:28,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9356 states and 52310 transitions. [2021-10-06 21:15:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:28,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:28,377 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:28,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:28,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:28,592 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2089125752, now seen corresponding path program 2 times [2021-10-06 21:15:28,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:28,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013272688] [2021-10-06 21:15:28,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:15:28,595 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:28,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:28,595 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:28,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-06 21:15:29,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:15:29,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:15:29,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:15:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:29,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:30,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:30,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013272688] [2021-10-06 21:15:30,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013272688] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:30,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:30,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:15:30,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232345910] [2021-10-06 21:15:30,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:15:30,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:15:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:30,257 INFO L87 Difference]: Start difference. First operand 9356 states and 52310 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:31,060 INFO L93 Difference]: Finished difference Result 11054 states and 59987 transitions. [2021-10-06 21:15:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:15:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:15:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:31,110 INFO L225 Difference]: With dead ends: 11054 [2021-10-06 21:15:31,110 INFO L226 Difference]: Without dead ends: 10966 [2021-10-06 21:15:31,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10966 states. [2021-10-06 21:15:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10966 to 9928. [2021-10-06 21:15:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9928 states, 9927 states have (on average 5.632416641482824) internal successors, (55913), 9927 states have internal predecessors, (55913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9928 states to 9928 states and 55913 transitions. [2021-10-06 21:15:31,598 INFO L78 Accepts]: Start accepts. Automaton has 9928 states and 55913 transitions. Word has length 25 [2021-10-06 21:15:31,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:31,598 INFO L470 AbstractCegarLoop]: Abstraction has 9928 states and 55913 transitions. [2021-10-06 21:15:31,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 9928 states and 55913 transitions. [2021-10-06 21:15:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:31,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:31,632 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:31,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:31,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:31,846 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:31,847 INFO L82 PathProgramCache]: Analyzing trace with hash -926902706, now seen corresponding path program 3 times [2021-10-06 21:15:31,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:31,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297838241] [2021-10-06 21:15:31,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:15:31,849 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:31,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:31,850 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:31,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-06 21:15:32,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:15:32,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:15:32,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:15:32,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:33,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:33,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:33,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297838241] [2021-10-06 21:15:33,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297838241] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:33,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:33,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:15:33,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001186928] [2021-10-06 21:15:33,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:15:33,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:15:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:33,526 INFO L87 Difference]: Start difference. First operand 9928 states and 55913 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:34,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:34,546 INFO L93 Difference]: Finished difference Result 11848 states and 64434 transitions. [2021-10-06 21:15:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 21:15:34,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:15:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:34,596 INFO L225 Difference]: With dead ends: 11848 [2021-10-06 21:15:34,597 INFO L226 Difference]: Without dead ends: 11726 [2021-10-06 21:15:34,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11726 states. [2021-10-06 21:15:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11726 to 10232. [2021-10-06 21:15:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10232 states, 10231 states have (on average 5.6728570032254915) internal successors, (58039), 10231 states have internal predecessors, (58039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10232 states to 10232 states and 58039 transitions. [2021-10-06 21:15:35,092 INFO L78 Accepts]: Start accepts. Automaton has 10232 states and 58039 transitions. Word has length 25 [2021-10-06 21:15:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:35,093 INFO L470 AbstractCegarLoop]: Abstraction has 10232 states and 58039 transitions. [2021-10-06 21:15:35,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 10232 states and 58039 transitions. [2021-10-06 21:15:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:35,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:35,129 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:35,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:35,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:35,330 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:35,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1235727182, now seen corresponding path program 4 times [2021-10-06 21:15:35,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:35,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413098051] [2021-10-06 21:15:35,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:15:35,332 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:35,333 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:35,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-06 21:15:36,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:15:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:15:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:15:36,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:36,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:37,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:37,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413098051] [2021-10-06 21:15:37,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413098051] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:37,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:37,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:15:37,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436768245] [2021-10-06 21:15:37,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:15:37,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:37,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:15:37,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:37,067 INFO L87 Difference]: Start difference. First operand 10232 states and 58039 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:37,646 INFO L93 Difference]: Finished difference Result 11278 states and 62531 transitions. [2021-10-06 21:15:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:15:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:15:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:37,703 INFO L225 Difference]: With dead ends: 11278 [2021-10-06 21:15:37,703 INFO L226 Difference]: Without dead ends: 11186 [2021-10-06 21:15:37,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11186 states. [2021-10-06 21:15:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11186 to 10616. [2021-10-06 21:15:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10616 states, 10615 states have (on average 5.6837494112105515) internal successors, (60333), 10615 states have internal predecessors, (60333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10616 states to 10616 states and 60333 transitions. [2021-10-06 21:15:38,118 INFO L78 Accepts]: Start accepts. Automaton has 10616 states and 60333 transitions. Word has length 25 [2021-10-06 21:15:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:38,119 INFO L470 AbstractCegarLoop]: Abstraction has 10616 states and 60333 transitions. [2021-10-06 21:15:38,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:38,119 INFO L276 IsEmpty]: Start isEmpty. Operand 10616 states and 60333 transitions. [2021-10-06 21:15:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:38,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:38,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:38,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:38,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:38,351 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:38,352 INFO L82 PathProgramCache]: Analyzing trace with hash 510210632, now seen corresponding path program 5 times [2021-10-06 21:15:38,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:38,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655562355] [2021-10-06 21:15:38,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:15:38,353 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:38,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:38,355 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:38,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-06 21:15:38,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:15:38,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:15:38,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:15:38,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:39,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:40,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:40,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655562355] [2021-10-06 21:15:40,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655562355] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:40,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:40,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:15:40,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961779961] [2021-10-06 21:15:40,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:15:40,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:40,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:15:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:40,151 INFO L87 Difference]: Start difference. First operand 10616 states and 60333 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:40,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:40,757 INFO L93 Difference]: Finished difference Result 11894 states and 66121 transitions. [2021-10-06 21:15:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:15:40,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:15:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:40,811 INFO L225 Difference]: With dead ends: 11894 [2021-10-06 21:15:40,811 INFO L226 Difference]: Without dead ends: 11808 [2021-10-06 21:15:40,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11808 states. [2021-10-06 21:15:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11808 to 11010. [2021-10-06 21:15:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11010 states, 11009 states have (on average 5.701971114542647) internal successors, (62773), 11009 states have internal predecessors, (62773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11010 states to 11010 states and 62773 transitions. [2021-10-06 21:15:41,181 INFO L78 Accepts]: Start accepts. Automaton has 11010 states and 62773 transitions. Word has length 25 [2021-10-06 21:15:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:41,181 INFO L470 AbstractCegarLoop]: Abstraction has 11010 states and 62773 transitions. [2021-10-06 21:15:41,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 11010 states and 62773 transitions. [2021-10-06 21:15:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:41,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:41,215 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:41,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:41,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:41,416 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash -699848626, now seen corresponding path program 6 times [2021-10-06 21:15:41,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:41,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889277650] [2021-10-06 21:15:41,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:15:41,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:41,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:41,420 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:41,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-06 21:15:42,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:15:42,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:15:42,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:15:42,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:43,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:43,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:43,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889277650] [2021-10-06 21:15:43,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889277650] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:43,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:43,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:15:43,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393321935] [2021-10-06 21:15:43,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:15:43,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:43,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:15:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:43,385 INFO L87 Difference]: Start difference. First operand 11010 states and 62773 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:44,273 INFO L93 Difference]: Finished difference Result 13576 states and 74762 transitions. [2021-10-06 21:15:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 21:15:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:15:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:44,341 INFO L225 Difference]: With dead ends: 13576 [2021-10-06 21:15:44,341 INFO L226 Difference]: Without dead ends: 13466 [2021-10-06 21:15:44,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13466 states. [2021-10-06 21:15:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13466 to 11400. [2021-10-06 21:15:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11400 states, 11399 states have (on average 5.759715764540749) internal successors, (65655), 11399 states have internal predecessors, (65655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:44,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11400 states to 11400 states and 65655 transitions. [2021-10-06 21:15:44,812 INFO L78 Accepts]: Start accepts. Automaton has 11400 states and 65655 transitions. Word has length 25 [2021-10-06 21:15:44,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:44,812 INFO L470 AbstractCegarLoop]: Abstraction has 11400 states and 65655 transitions. [2021-10-06 21:15:44,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 11400 states and 65655 transitions. [2021-10-06 21:15:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:44,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:44,844 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:44,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:45,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:45,045 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:45,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1418033070, now seen corresponding path program 9 times [2021-10-06 21:15:45,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:45,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008903214] [2021-10-06 21:15:45,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:15:45,047 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:45,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:45,048 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:45,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-06 21:15:45,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:15:45,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:15:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:15:45,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:46,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:46,865 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:46,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008903214] [2021-10-06 21:15:46,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008903214] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:46,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:46,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:15:46,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967587146] [2021-10-06 21:15:46,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:15:46,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:15:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:46,868 INFO L87 Difference]: Start difference. First operand 11400 states and 65655 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:15:53,601 INFO L93 Difference]: Finished difference Result 12030 states and 67892 transitions. [2021-10-06 21:15:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:15:53,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:15:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:15:53,659 INFO L225 Difference]: With dead ends: 12030 [2021-10-06 21:15:53,659 INFO L226 Difference]: Without dead ends: 11980 [2021-10-06 21:15:53,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:15:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11980 states. [2021-10-06 21:15:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11980 to 11598. [2021-10-06 21:15:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11598 states, 11597 states have (on average 5.744330430283694) internal successors, (66617), 11597 states have internal predecessors, (66617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11598 states to 11598 states and 66617 transitions. [2021-10-06 21:15:54,158 INFO L78 Accepts]: Start accepts. Automaton has 11598 states and 66617 transitions. Word has length 25 [2021-10-06 21:15:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:15:54,158 INFO L470 AbstractCegarLoop]: Abstraction has 11598 states and 66617 transitions. [2021-10-06 21:15:54,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:15:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 11598 states and 66617 transitions. [2021-10-06 21:15:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:15:54,190 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:15:54,191 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:15:54,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-06 21:15:54,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:15:54,392 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:15:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:15:54,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2028855474, now seen corresponding path program 10 times [2021-10-06 21:15:54,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:15:54,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047826073] [2021-10-06 21:15:54,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:15:54,394 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:15:54,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:15:54,395 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:15:54,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-06 21:15:55,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:15:55,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:15:55,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:15:55,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:15:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:57,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:15:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:15:58,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:15:58,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047826073] [2021-10-06 21:15:58,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047826073] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:15:58,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:15:58,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:15:58,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492572051] [2021-10-06 21:15:58,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:15:58,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:15:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:15:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-06 21:15:58,138 INFO L87 Difference]: Start difference. First operand 11598 states and 66617 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:16:36,105 INFO L93 Difference]: Finished difference Result 12310 states and 69045 transitions. [2021-10-06 21:16:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:16:36,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:16:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:16:36,157 INFO L225 Difference]: With dead ends: 12310 [2021-10-06 21:16:36,157 INFO L226 Difference]: Without dead ends: 12260 [2021-10-06 21:16:36,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2428.0ms TimeCoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-06 21:16:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12260 states. [2021-10-06 21:16:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12260 to 11692. [2021-10-06 21:16:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11692 states, 11691 states have (on average 5.74039859721153) internal successors, (67111), 11691 states have internal predecessors, (67111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11692 states to 11692 states and 67111 transitions. [2021-10-06 21:16:36,583 INFO L78 Accepts]: Start accepts. Automaton has 11692 states and 67111 transitions. Word has length 25 [2021-10-06 21:16:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:16:36,583 INFO L470 AbstractCegarLoop]: Abstraction has 11692 states and 67111 transitions. [2021-10-06 21:16:36,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 11692 states and 67111 transitions. [2021-10-06 21:16:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:16:36,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:16:36,616 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:16:36,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-06 21:16:36,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:16:36,817 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:16:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:16:36,818 INFO L82 PathProgramCache]: Analyzing trace with hash 45999857, now seen corresponding path program 11 times [2021-10-06 21:16:36,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:16:36,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136256649] [2021-10-06 21:16:36,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:16:36,819 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:16:36,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:16:36,820 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:16:36,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-06 21:16:37,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:16:37,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:16:37,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:16:37,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:16:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:37,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:16:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:38,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:16:38,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136256649] [2021-10-06 21:16:38,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136256649] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:16:38,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:16:38,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-06 21:16:38,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147427249] [2021-10-06 21:16:38,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:16:38,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:16:38,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:16:38,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:16:38,405 INFO L87 Difference]: Start difference. First operand 11692 states and 67111 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:41,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:16:41,160 INFO L93 Difference]: Finished difference Result 22160 states and 117770 transitions. [2021-10-06 21:16:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-06 21:16:41,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:16:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:16:41,260 INFO L225 Difference]: With dead ends: 22160 [2021-10-06 21:16:41,260 INFO L226 Difference]: Without dead ends: 22160 [2021-10-06 21:16:41,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1287.1ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:16:41,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22160 states. [2021-10-06 21:16:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22160 to 13008. [2021-10-06 21:16:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13008 states, 13007 states have (on average 5.847312985315599) internal successors, (76056), 13007 states have internal predecessors, (76056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13008 states to 13008 states and 76056 transitions. [2021-10-06 21:16:41,828 INFO L78 Accepts]: Start accepts. Automaton has 13008 states and 76056 transitions. Word has length 25 [2021-10-06 21:16:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:16:41,828 INFO L470 AbstractCegarLoop]: Abstraction has 13008 states and 76056 transitions. [2021-10-06 21:16:41,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 13008 states and 76056 transitions. [2021-10-06 21:16:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:16:41,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:16:41,867 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:16:41,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-10-06 21:16:42,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:16:42,068 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:16:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:16:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -300691378, now seen corresponding path program 7 times [2021-10-06 21:16:42,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:16:42,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468098632] [2021-10-06 21:16:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:16:42,070 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:16:42,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:16:42,072 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:16:42,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-06 21:16:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:16:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:16:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:16:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:43,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:16:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:43,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:16:43,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468098632] [2021-10-06 21:16:43,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468098632] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:16:43,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:16:43,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:16:43,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793490902] [2021-10-06 21:16:43,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:16:43,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:16:43,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:16:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:43,976 INFO L87 Difference]: Start difference. First operand 13008 states and 76056 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:16:44,672 INFO L93 Difference]: Finished difference Result 14232 states and 81150 transitions. [2021-10-06 21:16:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:16:44,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:16:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:16:44,735 INFO L225 Difference]: With dead ends: 14232 [2021-10-06 21:16:44,735 INFO L226 Difference]: Without dead ends: 14132 [2021-10-06 21:16:44,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14132 states. [2021-10-06 21:16:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14132 to 13186. [2021-10-06 21:16:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13186 states, 13185 states have (on average 5.855669321198332) internal successors, (77207), 13185 states have internal predecessors, (77207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13186 states to 13186 states and 77207 transitions. [2021-10-06 21:16:45,200 INFO L78 Accepts]: Start accepts. Automaton has 13186 states and 77207 transitions. Word has length 25 [2021-10-06 21:16:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:16:45,200 INFO L470 AbstractCegarLoop]: Abstraction has 13186 states and 77207 transitions. [2021-10-06 21:16:45,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:45,201 INFO L276 IsEmpty]: Start isEmpty. Operand 13186 states and 77207 transitions. [2021-10-06 21:16:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:16:45,239 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:16:45,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:16:45,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-06 21:16:45,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:16:45,441 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:16:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:16:45,441 INFO L82 PathProgramCache]: Analyzing trace with hash -381893176, now seen corresponding path program 8 times [2021-10-06 21:16:45,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:16:45,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127880006] [2021-10-06 21:16:45,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:16:45,442 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:16:45,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:16:45,443 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:16:45,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-06 21:16:46,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:16:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:16:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:16:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:16:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:47,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:16:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:47,717 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:16:47,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127880006] [2021-10-06 21:16:47,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127880006] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:16:47,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:16:47,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:16:47,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786895266] [2021-10-06 21:16:47,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:16:47,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:16:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:16:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:47,720 INFO L87 Difference]: Start difference. First operand 13186 states and 77207 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:16:48,298 INFO L93 Difference]: Finished difference Result 14560 states and 83174 transitions. [2021-10-06 21:16:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:16:48,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:16:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:16:48,362 INFO L225 Difference]: With dead ends: 14560 [2021-10-06 21:16:48,362 INFO L226 Difference]: Without dead ends: 14472 [2021-10-06 21:16:48,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14472 states. [2021-10-06 21:16:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14472 to 13284. [2021-10-06 21:16:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13284 states, 13283 states have (on average 5.8805992622148615) internal successors, (78112), 13283 states have internal predecessors, (78112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13284 states to 13284 states and 78112 transitions. [2021-10-06 21:16:49,015 INFO L78 Accepts]: Start accepts. Automaton has 13284 states and 78112 transitions. Word has length 25 [2021-10-06 21:16:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:16:49,015 INFO L470 AbstractCegarLoop]: Abstraction has 13284 states and 78112 transitions. [2021-10-06 21:16:49,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 13284 states and 78112 transitions. [2021-10-06 21:16:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:16:49,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:16:49,061 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:16:49,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-06 21:16:49,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:16:49,262 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:16:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:16:49,263 INFO L82 PathProgramCache]: Analyzing trace with hash 486806286, now seen corresponding path program 9 times [2021-10-06 21:16:49,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:16:49,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057138084] [2021-10-06 21:16:49,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:16:49,264 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:16:49,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:16:49,265 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:16:49,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-06 21:16:50,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:16:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:16:50,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:16:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:16:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:50,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:16:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:51,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:16:51,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057138084] [2021-10-06 21:16:51,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057138084] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:16:51,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:16:51,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:16:51,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111340951] [2021-10-06 21:16:51,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:16:51,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:16:51,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:16:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:51,295 INFO L87 Difference]: Start difference. First operand 13284 states and 78112 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:16:52,133 INFO L93 Difference]: Finished difference Result 14896 states and 84960 transitions. [2021-10-06 21:16:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 21:16:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:16:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:16:52,202 INFO L225 Difference]: With dead ends: 14896 [2021-10-06 21:16:52,202 INFO L226 Difference]: Without dead ends: 14774 [2021-10-06 21:16:52,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14774 states. [2021-10-06 21:16:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14774 to 13442. [2021-10-06 21:16:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13442 states, 13441 states have (on average 5.897924261587679) internal successors, (79274), 13441 states have internal predecessors, (79274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13442 states to 13442 states and 79274 transitions. [2021-10-06 21:16:52,809 INFO L78 Accepts]: Start accepts. Automaton has 13442 states and 79274 transitions. Word has length 25 [2021-10-06 21:16:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:16:52,809 INFO L470 AbstractCegarLoop]: Abstraction has 13442 states and 79274 transitions. [2021-10-06 21:16:52,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 13442 states and 79274 transitions. [2021-10-06 21:16:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:16:52,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:16:52,849 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:16:52,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-10-06 21:16:53,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:16:53,050 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:16:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:16:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1083170930, now seen corresponding path program 10 times [2021-10-06 21:16:53,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:16:53,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363170025] [2021-10-06 21:16:53,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:16:53,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:16:53,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:16:53,054 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:16:53,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-06 21:16:53,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:16:53,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:16:53,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:16:53,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:16:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:54,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:16:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:55,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:16:55,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363170025] [2021-10-06 21:16:55,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363170025] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:16:55,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:16:55,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:16:55,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608261572] [2021-10-06 21:16:55,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:16:55,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:16:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:16:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:55,041 INFO L87 Difference]: Start difference. First operand 13442 states and 79274 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:16:55,703 INFO L93 Difference]: Finished difference Result 14280 states and 82721 transitions. [2021-10-06 21:16:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:16:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:16:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:16:55,780 INFO L225 Difference]: With dead ends: 14280 [2021-10-06 21:16:55,781 INFO L226 Difference]: Without dead ends: 14198 [2021-10-06 21:16:55,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14198 states. [2021-10-06 21:16:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14198 to 13660. [2021-10-06 21:16:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13660 states, 13659 states have (on average 5.89501427630134) internal successors, (80520), 13659 states have internal predecessors, (80520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13660 states to 13660 states and 80520 transitions. [2021-10-06 21:16:56,313 INFO L78 Accepts]: Start accepts. Automaton has 13660 states and 80520 transitions. Word has length 25 [2021-10-06 21:16:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:16:56,313 INFO L470 AbstractCegarLoop]: Abstraction has 13660 states and 80520 transitions. [2021-10-06 21:16:56,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 13660 states and 80520 transitions. [2021-10-06 21:16:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:16:56,497 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:16:56,497 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:16:56,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-10-06 21:16:56,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:16:56,711 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:16:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:16:56,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1808687480, now seen corresponding path program 11 times [2021-10-06 21:16:56,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:16:56,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897029775] [2021-10-06 21:16:56,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:16:56,713 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:16:56,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:16:56,715 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:16:56,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-06 21:16:57,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:16:57,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:16:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:16:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:16:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:58,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:16:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:16:58,583 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:16:58,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897029775] [2021-10-06 21:16:58,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897029775] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:16:58,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:16:58,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:16:58,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602000201] [2021-10-06 21:16:58,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:16:58,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:16:58,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:16:58,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:58,585 INFO L87 Difference]: Start difference. First operand 13660 states and 80520 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:16:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:16:59,331 INFO L93 Difference]: Finished difference Result 14626 states and 84701 transitions. [2021-10-06 21:16:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:16:59,331 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:16:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:16:59,396 INFO L225 Difference]: With dead ends: 14626 [2021-10-06 21:16:59,397 INFO L226 Difference]: Without dead ends: 14548 [2021-10-06 21:16:59,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:16:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14548 states. [2021-10-06 21:16:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14548 to 13844. [2021-10-06 21:16:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13844 states, 13843 states have (on average 5.899877194249801) internal successors, (81672), 13843 states have internal predecessors, (81672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13844 states to 13844 states and 81672 transitions. [2021-10-06 21:17:00,146 INFO L78 Accepts]: Start accepts. Automaton has 13844 states and 81672 transitions. Word has length 25 [2021-10-06 21:17:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:17:00,146 INFO L470 AbstractCegarLoop]: Abstraction has 13844 states and 81672 transitions. [2021-10-06 21:17:00,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 13844 states and 81672 transitions. [2021-10-06 21:17:00,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:17:00,199 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:17:00,199 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:17:00,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-06 21:17:00,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:17:00,414 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:17:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:17:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash 609792264, now seen corresponding path program 12 times [2021-10-06 21:17:00,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:17:00,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324924679] [2021-10-06 21:17:00,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:17:00,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:17:00,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:17:00,418 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:17:00,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-06 21:17:01,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:17:01,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:17:01,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:17:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:17:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:17:02,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:17:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:17:02,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:17:02,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324924679] [2021-10-06 21:17:02,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324924679] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:17:02,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:17:02,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:17:02,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740391054] [2021-10-06 21:17:02,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:17:02,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:17:02,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:17:02,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:17:02,538 INFO L87 Difference]: Start difference. First operand 13844 states and 81672 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:03,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:17:03,280 INFO L93 Difference]: Finished difference Result 16002 states and 91384 transitions. [2021-10-06 21:17:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 21:17:03,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:17:03,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:17:03,351 INFO L225 Difference]: With dead ends: 16002 [2021-10-06 21:17:03,351 INFO L226 Difference]: Without dead ends: 15894 [2021-10-06 21:17:03,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:17:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15894 states. [2021-10-06 21:17:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15894 to 14064. [2021-10-06 21:17:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14064 states, 14063 states have (on average 5.92618929104743) internal successors, (83340), 14063 states have internal predecessors, (83340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14064 states to 14064 states and 83340 transitions. [2021-10-06 21:17:04,041 INFO L78 Accepts]: Start accepts. Automaton has 14064 states and 83340 transitions. Word has length 25 [2021-10-06 21:17:04,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:17:04,041 INFO L470 AbstractCegarLoop]: Abstraction has 14064 states and 83340 transitions. [2021-10-06 21:17:04,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:04,042 INFO L276 IsEmpty]: Start isEmpty. Operand 14064 states and 83340 transitions. [2021-10-06 21:17:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:17:04,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:17:04,084 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:17:04,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-10-06 21:17:04,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:17:04,285 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:17:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:17:04,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1079230430, now seen corresponding path program 12 times [2021-10-06 21:17:04,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:17:04,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020805362] [2021-10-06 21:17:04,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:17:04,287 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:17:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:17:04,289 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:17:04,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-06 21:17:05,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:17:05,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:17:05,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:17:05,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:17:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:17:06,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:17:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:17:06,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:17:06,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020805362] [2021-10-06 21:17:06,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020805362] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:17:06,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:17:06,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:17:06,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827998839] [2021-10-06 21:17:06,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:17:06,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:17:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:17:06,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:17:06,343 INFO L87 Difference]: Start difference. First operand 14064 states and 83340 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:17:09,365 INFO L93 Difference]: Finished difference Result 14588 states and 85176 transitions. [2021-10-06 21:17:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:17:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:17:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:17:09,438 INFO L225 Difference]: With dead ends: 14588 [2021-10-06 21:17:09,439 INFO L226 Difference]: Without dead ends: 14538 [2021-10-06 21:17:09,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:17:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14538 states. [2021-10-06 21:17:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14538 to 14184. [2021-10-06 21:17:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14183 states have (on average 5.917859409151801) internal successors, (83933), 14183 states have internal predecessors, (83933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 83933 transitions. [2021-10-06 21:17:10,180 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 83933 transitions. Word has length 25 [2021-10-06 21:17:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:17:10,181 INFO L470 AbstractCegarLoop]: Abstraction has 14184 states and 83933 transitions. [2021-10-06 21:17:10,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 83933 transitions. [2021-10-06 21:17:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:17:10,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:17:10,233 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:17:10,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-06 21:17:10,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:17:10,434 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:17:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:17:10,435 INFO L82 PathProgramCache]: Analyzing trace with hash 127887134, now seen corresponding path program 13 times [2021-10-06 21:17:10,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:17:10,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917653873] [2021-10-06 21:17:10,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:17:10,437 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:17:10,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:17:10,438 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:17:10,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-06 21:17:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:17:11,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:17:11,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:17:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:17:13,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:17:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:17:14,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:17:14,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917653873] [2021-10-06 21:17:14,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917653873] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:17:14,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:17:14,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:17:14,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960546738] [2021-10-06 21:17:14,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:17:14,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:17:14,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:17:14,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-06 21:17:14,398 INFO L87 Difference]: Start difference. First operand 14184 states and 83933 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:17:53,011 INFO L93 Difference]: Finished difference Result 14730 states and 85567 transitions. [2021-10-06 21:17:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:17:53,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:17:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:17:53,078 INFO L225 Difference]: With dead ends: 14730 [2021-10-06 21:17:53,078 INFO L226 Difference]: Without dead ends: 14680 [2021-10-06 21:17:53,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2269.1ms TimeCoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-06 21:17:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14680 states. [2021-10-06 21:17:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14680 to 14170. [2021-10-06 21:17:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14170 states, 14169 states have (on average 5.917919401510339) internal successors, (83851), 14169 states have internal predecessors, (83851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14170 states to 14170 states and 83851 transitions. [2021-10-06 21:17:53,599 INFO L78 Accepts]: Start accepts. Automaton has 14170 states and 83851 transitions. Word has length 25 [2021-10-06 21:17:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:17:53,599 INFO L470 AbstractCegarLoop]: Abstraction has 14170 states and 83851 transitions. [2021-10-06 21:17:53,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 14170 states and 83851 transitions. [2021-10-06 21:17:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:17:53,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:17:53,801 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:17:53,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-06 21:17:54,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:17:54,015 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:17:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:17:54,016 INFO L82 PathProgramCache]: Analyzing trace with hash 53809187, now seen corresponding path program 14 times [2021-10-06 21:17:54,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:17:54,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500137443] [2021-10-06 21:17:54,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:17:54,017 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:17:54,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:17:54,018 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:17:54,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-06 21:17:55,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:17:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:17:55,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:17:55,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:17:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:17:55,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:17:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:17:56,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:17:56,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500137443] [2021-10-06 21:17:56,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500137443] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:17:56,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:17:56,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-06 21:17:56,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404946241] [2021-10-06 21:17:56,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:17:56,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:17:56,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:17:56,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:17:56,103 INFO L87 Difference]: Start difference. First operand 14170 states and 83851 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:17:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:17:59,628 INFO L93 Difference]: Finished difference Result 25416 states and 137388 transitions. [2021-10-06 21:17:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-06 21:17:59,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:17:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:17:59,746 INFO L225 Difference]: With dead ends: 25416 [2021-10-06 21:17:59,747 INFO L226 Difference]: Without dead ends: 25416 [2021-10-06 21:17:59,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1840.2ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-10-06 21:17:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25416 states. [2021-10-06 21:18:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25416 to 14926. [2021-10-06 21:18:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14926 states, 14925 states have (on average 5.938827470686767) internal successors, (88637), 14925 states have internal predecessors, (88637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14926 states to 14926 states and 88637 transitions. [2021-10-06 21:18:00,570 INFO L78 Accepts]: Start accepts. Automaton has 14926 states and 88637 transitions. Word has length 25 [2021-10-06 21:18:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:00,571 INFO L470 AbstractCegarLoop]: Abstraction has 14926 states and 88637 transitions. [2021-10-06 21:18:00,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 14926 states and 88637 transitions. [2021-10-06 21:18:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:18:00,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:00,616 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:00,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-06 21:18:00,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:00,817 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:00,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1603837234, now seen corresponding path program 13 times [2021-10-06 21:18:00,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:00,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683234701] [2021-10-06 21:18:00,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:18:00,819 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:00,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:00,820 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:00,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-06 21:18:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:18:01,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:18:01,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:02,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:02,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:02,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683234701] [2021-10-06 21:18:02,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683234701] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:02,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:02,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:18:02,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247367458] [2021-10-06 21:18:02,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:18:02,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:02,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:18:02,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:02,910 INFO L87 Difference]: Start difference. First operand 14926 states and 88637 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:03,956 INFO L93 Difference]: Finished difference Result 16840 states and 97037 transitions. [2021-10-06 21:18:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 21:18:03,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:18:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:04,044 INFO L225 Difference]: With dead ends: 16840 [2021-10-06 21:18:04,045 INFO L226 Difference]: Without dead ends: 16742 [2021-10-06 21:18:04,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16742 states. [2021-10-06 21:18:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16742 to 15050. [2021-10-06 21:18:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15050 states, 15049 states have (on average 5.955478769353445) internal successors, (89624), 15049 states have internal predecessors, (89624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15050 states to 15050 states and 89624 transitions. [2021-10-06 21:18:04,607 INFO L78 Accepts]: Start accepts. Automaton has 15050 states and 89624 transitions. Word has length 25 [2021-10-06 21:18:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:04,607 INFO L470 AbstractCegarLoop]: Abstraction has 15050 states and 89624 transitions. [2021-10-06 21:18:04,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 15050 states and 89624 transitions. [2021-10-06 21:18:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:18:04,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:04,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:04,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-06 21:18:04,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:04,854 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:04,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1566532494, now seen corresponding path program 14 times [2021-10-06 21:18:04,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:04,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554597038] [2021-10-06 21:18:04,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:18:04,856 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:04,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:04,857 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:04,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-10-06 21:18:06,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:18:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:18:06,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:18:06,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:06,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:07,192 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:07,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554597038] [2021-10-06 21:18:07,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554597038] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:07,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:07,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:18:07,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651245460] [2021-10-06 21:18:07,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:18:07,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:18:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:07,194 INFO L87 Difference]: Start difference. First operand 15050 states and 89624 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:08,046 INFO L93 Difference]: Finished difference Result 17508 states and 100936 transitions. [2021-10-06 21:18:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 21:18:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:18:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:08,125 INFO L225 Difference]: With dead ends: 17508 [2021-10-06 21:18:08,125 INFO L226 Difference]: Without dead ends: 17396 [2021-10-06 21:18:08,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17396 states. [2021-10-06 21:18:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17396 to 15238. [2021-10-06 21:18:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15238 states, 15237 states have (on average 5.9835269409988845) internal successors, (91171), 15237 states have internal predecessors, (91171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15238 states to 15238 states and 91171 transitions. [2021-10-06 21:18:08,866 INFO L78 Accepts]: Start accepts. Automaton has 15238 states and 91171 transitions. Word has length 25 [2021-10-06 21:18:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:08,866 INFO L470 AbstractCegarLoop]: Abstraction has 15238 states and 91171 transitions. [2021-10-06 21:18:08,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 15238 states and 91171 transitions. [2021-10-06 21:18:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:18:08,927 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:08,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:08,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-10-06 21:18:09,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:09,129 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash 777578568, now seen corresponding path program 15 times [2021-10-06 21:18:09,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:09,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049106151] [2021-10-06 21:18:09,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:18:09,131 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:09,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:09,133 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:09,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-10-06 21:18:10,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:18:10,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:18:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:18:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:11,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:11,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:11,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049106151] [2021-10-06 21:18:11,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049106151] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:11,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:11,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:18:11,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027443843] [2021-10-06 21:18:11,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:18:11,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:18:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:11,541 INFO L87 Difference]: Start difference. First operand 15238 states and 91171 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:12,251 INFO L93 Difference]: Finished difference Result 16358 states and 95730 transitions. [2021-10-06 21:18:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:18:12,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:18:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:12,325 INFO L225 Difference]: With dead ends: 16358 [2021-10-06 21:18:12,325 INFO L226 Difference]: Without dead ends: 16280 [2021-10-06 21:18:12,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16280 states. [2021-10-06 21:18:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16280 to 15244. [2021-10-06 21:18:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15244 states, 15243 states have (on average 5.980318834875025) internal successors, (91158), 15243 states have internal predecessors, (91158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15244 states to 15244 states and 91158 transitions. [2021-10-06 21:18:13,093 INFO L78 Accepts]: Start accepts. Automaton has 15244 states and 91158 transitions. Word has length 25 [2021-10-06 21:18:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:13,093 INFO L470 AbstractCegarLoop]: Abstraction has 15244 states and 91158 transitions. [2021-10-06 21:18:13,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 15244 states and 91158 transitions. [2021-10-06 21:18:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:18:13,139 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:13,139 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:13,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-10-06 21:18:13,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:13,340 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:13,342 INFO L82 PathProgramCache]: Analyzing trace with hash 436746498, now seen corresponding path program 16 times [2021-10-06 21:18:13,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:13,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102036790] [2021-10-06 21:18:13,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:18:13,343 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:13,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:13,344 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:13,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-06 21:18:14,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:18:14,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:18:14,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:18:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:15,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:15,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:15,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102036790] [2021-10-06 21:18:15,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102036790] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:15,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:15,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:18:15,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541365606] [2021-10-06 21:18:15,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:18:15,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:18:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:15,489 INFO L87 Difference]: Start difference. First operand 15244 states and 91158 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:16,401 INFO L93 Difference]: Finished difference Result 16524 states and 96299 transitions. [2021-10-06 21:18:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:18:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:18:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:16,489 INFO L225 Difference]: With dead ends: 16524 [2021-10-06 21:18:16,489 INFO L226 Difference]: Without dead ends: 16438 [2021-10-06 21:18:16,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16438 states. [2021-10-06 21:18:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16438 to 15126. [2021-10-06 21:18:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15126 states, 15125 states have (on average 5.977057851239669) internal successors, (90403), 15125 states have internal predecessors, (90403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15126 states to 15126 states and 90403 transitions. [2021-10-06 21:18:17,220 INFO L78 Accepts]: Start accepts. Automaton has 15126 states and 90403 transitions. Word has length 25 [2021-10-06 21:18:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:17,220 INFO L470 AbstractCegarLoop]: Abstraction has 15126 states and 90403 transitions. [2021-10-06 21:18:17,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 15126 states and 90403 transitions. [2021-10-06 21:18:17,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:18:17,265 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:17,265 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:17,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-10-06 21:18:17,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:17,466 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:17,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:17,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1846768846, now seen corresponding path program 17 times [2021-10-06 21:18:17,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:17,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855976916] [2021-10-06 21:18:17,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:18:17,469 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:17,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:17,470 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:17,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-10-06 21:18:18,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:18:18,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:18:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:18:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:19,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:19,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:19,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855976916] [2021-10-06 21:18:19,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855976916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:19,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:19,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:18:19,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051268360] [2021-10-06 21:18:19,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:18:19,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:19,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:18:19,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:19,571 INFO L87 Difference]: Start difference. First operand 15126 states and 90403 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:20,439 INFO L93 Difference]: Finished difference Result 17468 states and 101378 transitions. [2021-10-06 21:18:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 21:18:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:18:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:20,519 INFO L225 Difference]: With dead ends: 17468 [2021-10-06 21:18:20,519 INFO L226 Difference]: Without dead ends: 17388 [2021-10-06 21:18:20,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17388 states. [2021-10-06 21:18:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17388 to 15320. [2021-10-06 21:18:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15320 states, 15319 states have (on average 6.005091716169463) internal successors, (91992), 15319 states have internal predecessors, (91992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15320 states to 15320 states and 91992 transitions. [2021-10-06 21:18:21,351 INFO L78 Accepts]: Start accepts. Automaton has 15320 states and 91992 transitions. Word has length 25 [2021-10-06 21:18:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:21,352 INFO L470 AbstractCegarLoop]: Abstraction has 15320 states and 91992 transitions. [2021-10-06 21:18:21,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 15320 states and 91992 transitions. [2021-10-06 21:18:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:18:21,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:21,398 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:21,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2021-10-06 21:18:21,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:21,599 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:21,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:21,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1018473346, now seen corresponding path program 18 times [2021-10-06 21:18:21,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:21,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760725043] [2021-10-06 21:18:21,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:18:21,601 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:21,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:21,602 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:21,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-10-06 21:18:22,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:18:22,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:18:22,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:18:22,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:23,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:23,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:23,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760725043] [2021-10-06 21:18:23,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760725043] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:23,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:23,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:18:23,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872558420] [2021-10-06 21:18:23,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:18:23,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:23,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:18:23,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:23,915 INFO L87 Difference]: Start difference. First operand 15320 states and 91992 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:24,751 INFO L93 Difference]: Finished difference Result 18372 states and 107013 transitions. [2021-10-06 21:18:24,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-06 21:18:24,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-06 21:18:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:24,835 INFO L225 Difference]: With dead ends: 18372 [2021-10-06 21:18:24,835 INFO L226 Difference]: Without dead ends: 18282 [2021-10-06 21:18:24,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:18:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2021-10-06 21:18:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 15624. [2021-10-06 21:18:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15624 states, 15623 states have (on average 6.051462587211163) internal successors, (94542), 15623 states have internal predecessors, (94542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15624 states to 15624 states and 94542 transitions. [2021-10-06 21:18:25,618 INFO L78 Accepts]: Start accepts. Automaton has 15624 states and 94542 transitions. Word has length 25 [2021-10-06 21:18:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:25,619 INFO L470 AbstractCegarLoop]: Abstraction has 15624 states and 94542 transitions. [2021-10-06 21:18:25,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:25,619 INFO L276 IsEmpty]: Start isEmpty. Operand 15624 states and 94542 transitions. [2021-10-06 21:18:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:18:25,675 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:25,675 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:25,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-10-06 21:18:25,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:25,882 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:25,883 INFO L82 PathProgramCache]: Analyzing trace with hash 167731964, now seen corresponding path program 15 times [2021-10-06 21:18:25,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:25,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480876019] [2021-10-06 21:18:25,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:18:25,884 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:25,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:25,886 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:25,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-10-06 21:18:27,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:18:27,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:18:27,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:18:27,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:27,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:27,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:27,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480876019] [2021-10-06 21:18:27,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480876019] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:27,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:27,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-06 21:18:27,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378559769] [2021-10-06 21:18:27,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:18:27,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:18:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:18:27,942 INFO L87 Difference]: Start difference. First operand 15624 states and 94542 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:29,576 INFO L93 Difference]: Finished difference Result 18356 states and 105719 transitions. [2021-10-06 21:18:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:18:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:18:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:29,663 INFO L225 Difference]: With dead ends: 18356 [2021-10-06 21:18:29,663 INFO L226 Difference]: Without dead ends: 18294 [2021-10-06 21:18:29,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 740.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:18:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18294 states. [2021-10-06 21:18:30,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18294 to 16512. [2021-10-06 21:18:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16512 states, 16511 states have (on average 5.984858579129066) internal successors, (98816), 16511 states have internal predecessors, (98816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16512 states to 16512 states and 98816 transitions. [2021-10-06 21:18:30,510 INFO L78 Accepts]: Start accepts. Automaton has 16512 states and 98816 transitions. Word has length 26 [2021-10-06 21:18:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:30,510 INFO L470 AbstractCegarLoop]: Abstraction has 16512 states and 98816 transitions. [2021-10-06 21:18:30,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 16512 states and 98816 transitions. [2021-10-06 21:18:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:18:30,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:30,579 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:30,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-10-06 21:18:30,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:30,795 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:30,796 INFO L82 PathProgramCache]: Analyzing trace with hash -524261223, now seen corresponding path program 16 times [2021-10-06 21:18:30,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:30,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937843955] [2021-10-06 21:18:30,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:18:30,797 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:30,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:30,798 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:30,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-10-06 21:18:31,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:18:31,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:18:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:18:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:32,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:32,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:32,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937843955] [2021-10-06 21:18:32,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937843955] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:32,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:32,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:18:32,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012456468] [2021-10-06 21:18:32,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:18:32,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:32,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:18:32,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:18:32,870 INFO L87 Difference]: Start difference. First operand 16512 states and 98816 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:37,773 INFO L93 Difference]: Finished difference Result 26078 states and 145825 transitions. [2021-10-06 21:18:37,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 21:18:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:18:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:37,923 INFO L225 Difference]: With dead ends: 26078 [2021-10-06 21:18:37,924 INFO L226 Difference]: Without dead ends: 26078 [2021-10-06 21:18:37,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2279.8ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 21:18:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26078 states. [2021-10-06 21:18:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26078 to 18846. [2021-10-06 21:18:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18846 states, 18845 states have (on average 6.019580790660653) internal successors, (113439), 18845 states have internal predecessors, (113439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:38,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18846 states to 18846 states and 113439 transitions. [2021-10-06 21:18:38,943 INFO L78 Accepts]: Start accepts. Automaton has 18846 states and 113439 transitions. Word has length 26 [2021-10-06 21:18:38,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:38,943 INFO L470 AbstractCegarLoop]: Abstraction has 18846 states and 113439 transitions. [2021-10-06 21:18:38,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 18846 states and 113439 transitions. [2021-10-06 21:18:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:18:39,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:39,001 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:39,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-10-06 21:18:39,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:39,202 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1455771792, now seen corresponding path program 17 times [2021-10-06 21:18:39,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:39,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514213901] [2021-10-06 21:18:39,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:18:39,204 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:39,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:39,205 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:39,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-10-06 21:18:40,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:18:40,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:18:40,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:18:40,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:40,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:41,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:41,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514213901] [2021-10-06 21:18:41,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514213901] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:41,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:41,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:18:41,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756056486] [2021-10-06 21:18:41,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:18:41,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:41,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:18:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:18:41,467 INFO L87 Difference]: Start difference. First operand 18846 states and 113439 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:48,734 INFO L93 Difference]: Finished difference Result 27242 states and 152963 transitions. [2021-10-06 21:18:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-06 21:18:48,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:18:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:48,876 INFO L225 Difference]: With dead ends: 27242 [2021-10-06 21:18:48,876 INFO L226 Difference]: Without dead ends: 27186 [2021-10-06 21:18:48,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2615.2ms TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2021-10-06 21:18:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27186 states. [2021-10-06 21:18:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27186 to 20038. [2021-10-06 21:18:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20038 states, 20037 states have (on average 6.0493586864301045) internal successors, (121211), 20037 states have internal predecessors, (121211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20038 states to 20038 states and 121211 transitions. [2021-10-06 21:18:49,861 INFO L78 Accepts]: Start accepts. Automaton has 20038 states and 121211 transitions. Word has length 26 [2021-10-06 21:18:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:49,862 INFO L470 AbstractCegarLoop]: Abstraction has 20038 states and 121211 transitions. [2021-10-06 21:18:49,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 20038 states and 121211 transitions. [2021-10-06 21:18:49,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:18:49,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:49,925 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:49,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-10-06 21:18:50,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:50,126 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash 654831328, now seen corresponding path program 18 times [2021-10-06 21:18:50,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:50,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884155833] [2021-10-06 21:18:50,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:18:50,128 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:50,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:50,129 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:50,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-10-06 21:18:51,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:18:51,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:18:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:18:51,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:18:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:51,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:18:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:18:52,511 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:18:52,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884155833] [2021-10-06 21:18:52,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884155833] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:18:52,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:18:52,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:18:52,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445016444] [2021-10-06 21:18:52,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:18:52,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:18:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:18:52,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:18:52,513 INFO L87 Difference]: Start difference. First operand 20038 states and 121211 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:18:57,674 INFO L93 Difference]: Finished difference Result 29806 states and 166331 transitions. [2021-10-06 21:18:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-06 21:18:57,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:18:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:18:57,838 INFO L225 Difference]: With dead ends: 29806 [2021-10-06 21:18:57,838 INFO L226 Difference]: Without dead ends: 29780 [2021-10-06 21:18:57,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2410.5ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:18:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29780 states. [2021-10-06 21:18:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29780 to 21192. [2021-10-06 21:18:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21192 states, 21191 states have (on average 6.0774857250719645) internal successors, (128788), 21191 states have internal predecessors, (128788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21192 states to 21192 states and 128788 transitions. [2021-10-06 21:18:58,913 INFO L78 Accepts]: Start accepts. Automaton has 21192 states and 128788 transitions. Word has length 26 [2021-10-06 21:18:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:18:58,913 INFO L470 AbstractCegarLoop]: Abstraction has 21192 states and 128788 transitions. [2021-10-06 21:18:58,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:18:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21192 states and 128788 transitions. [2021-10-06 21:18:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:18:58,980 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:18:58,980 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:18:58,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-10-06 21:18:59,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:18:59,188 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:18:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:18:59,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1138557296, now seen corresponding path program 19 times [2021-10-06 21:18:59,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:18:59,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124320537] [2021-10-06 21:18:59,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:18:59,190 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:18:59,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:18:59,192 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:18:59,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-10-06 21:19:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:19:00,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:19:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:19:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:19:00,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:19:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:19:01,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:19:01,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124320537] [2021-10-06 21:19:01,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124320537] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:19:01,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:19:01,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:19:01,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761492582] [2021-10-06 21:19:01,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:19:01,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:19:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:19:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:19:01,558 INFO L87 Difference]: Start difference. First operand 21192 states and 128788 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:19:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:19:06,477 INFO L93 Difference]: Finished difference Result 33030 states and 183031 transitions. [2021-10-06 21:19:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-06 21:19:06,478 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:19:06,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:19:06,647 INFO L225 Difference]: With dead ends: 33030 [2021-10-06 21:19:06,647 INFO L226 Difference]: Without dead ends: 33030 [2021-10-06 21:19:06,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2646.0ms TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:19:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33030 states. [2021-10-06 21:19:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33030 to 22610. [2021-10-06 21:19:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22610 states, 22609 states have (on average 6.13211552921403) internal successors, (138641), 22609 states have internal predecessors, (138641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:19:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22610 states to 22610 states and 138641 transitions. [2021-10-06 21:19:07,789 INFO L78 Accepts]: Start accepts. Automaton has 22610 states and 138641 transitions. Word has length 26 [2021-10-06 21:19:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:19:07,789 INFO L470 AbstractCegarLoop]: Abstraction has 22610 states and 138641 transitions. [2021-10-06 21:19:07,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:19:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 22610 states and 138641 transitions. [2021-10-06 21:19:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:19:08,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:19:08,120 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:19:08,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-10-06 21:19:08,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:19:08,335 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:19:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:19:08,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1275133727, now seen corresponding path program 20 times [2021-10-06 21:19:08,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:19:08,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284392474] [2021-10-06 21:19:08,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:19:08,337 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:19:08,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:19:08,338 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:19:08,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-10-06 21:19:09,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:19:09,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:19:09,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:19:09,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:19:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:19:10,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:19:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:19:10,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:19:10,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284392474] [2021-10-06 21:19:10,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284392474] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:19:10,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:19:10,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:19:10,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278756897] [2021-10-06 21:19:10,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:19:10,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:19:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:19:10,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:19:10,737 INFO L87 Difference]: Start difference. First operand 22610 states and 138641 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:19:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:19:16,962 INFO L93 Difference]: Finished difference Result 35058 states and 198403 transitions. [2021-10-06 21:19:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-06 21:19:16,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:19:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:19:17,143 INFO L225 Difference]: With dead ends: 35058 [2021-10-06 21:19:17,144 INFO L226 Difference]: Without dead ends: 35030 [2021-10-06 21:19:17,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2530.5ms TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2021-10-06 21:19:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35030 states. [2021-10-06 21:19:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35030 to 24742. [2021-10-06 21:19:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24742 states, 24741 states have (on average 6.212198375166727) internal successors, (153696), 24741 states have internal predecessors, (153696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:19:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24742 states to 24742 states and 153696 transitions. [2021-10-06 21:19:18,690 INFO L78 Accepts]: Start accepts. Automaton has 24742 states and 153696 transitions. Word has length 26 [2021-10-06 21:19:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:19:18,691 INFO L470 AbstractCegarLoop]: Abstraction has 24742 states and 153696 transitions. [2021-10-06 21:19:18,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:19:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 24742 states and 153696 transitions. [2021-10-06 21:19:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:19:18,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:19:18,789 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:19:18,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-10-06 21:19:18,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:19:18,990 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:19:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:19:18,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1391130907, now seen corresponding path program 21 times [2021-10-06 21:19:18,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:19:18,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837568613] [2021-10-06 21:19:18,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:19:18,992 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:19:18,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:19:18,993 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:19:18,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-10-06 21:19:20,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:19:20,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:19:20,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:19:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:19:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:19:21,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:19:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:19:21,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:19:21,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837568613] [2021-10-06 21:19:21,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837568613] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:19:21,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:19:21,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:19:21,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538353033] [2021-10-06 21:19:21,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:19:21,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:19:21,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:19:21,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:19:21,863 INFO L87 Difference]: Start difference. First operand 24742 states and 153696 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:20:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:20:29,928 INFO L93 Difference]: Finished difference Result 40636 states and 231874 transitions. [2021-10-06 21:20:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-06 21:20:29,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:20:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:20:30,143 INFO L225 Difference]: With dead ends: 40636 [2021-10-06 21:20:30,144 INFO L226 Difference]: Without dead ends: 40636 [2021-10-06 21:20:30,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 14924.2ms TimeCoverageRelationStatistics Valid=370, Invalid=1106, Unknown=6, NotChecked=0, Total=1482 [2021-10-06 21:20:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40636 states. [2021-10-06 21:20:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40636 to 27982. [2021-10-06 21:20:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27982 states, 27981 states have (on average 6.278975018762732) internal successors, (175692), 27981 states have internal predecessors, (175692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:20:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27982 states to 27982 states and 175692 transitions. [2021-10-06 21:20:31,750 INFO L78 Accepts]: Start accepts. Automaton has 27982 states and 175692 transitions. Word has length 26 [2021-10-06 21:20:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:20:31,750 INFO L470 AbstractCegarLoop]: Abstraction has 27982 states and 175692 transitions. [2021-10-06 21:20:31,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:20:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 27982 states and 175692 transitions. [2021-10-06 21:20:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:20:31,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:20:31,845 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:20:31,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-10-06 21:20:32,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:20:32,046 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:20:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:20:32,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1959513951, now seen corresponding path program 22 times [2021-10-06 21:20:32,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:20:32,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554671017] [2021-10-06 21:20:32,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:20:32,049 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:20:32,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:20:32,050 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:20:32,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-10-06 21:20:33,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:20:33,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:20:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:20:33,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:20:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:20:33,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:20:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:20:34,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:20:34,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554671017] [2021-10-06 21:20:34,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554671017] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:20:34,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:20:34,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:20:34,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887184259] [2021-10-06 21:20:34,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:20:34,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:20:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:20:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:20:34,645 INFO L87 Difference]: Start difference. First operand 27982 states and 175692 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:20:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:20:45,675 INFO L93 Difference]: Finished difference Result 34582 states and 205981 transitions. [2021-10-06 21:20:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 21:20:45,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:20:45,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:20:45,871 INFO L225 Difference]: With dead ends: 34582 [2021-10-06 21:20:45,871 INFO L226 Difference]: Without dead ends: 34524 [2021-10-06 21:20:45,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2251.5ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-10-06 21:20:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34524 states. [2021-10-06 21:20:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34524 to 28748. [2021-10-06 21:20:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28748 states, 28747 states have (on average 6.281385883744391) internal successors, (180571), 28747 states have internal predecessors, (180571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:20:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28748 states to 28748 states and 180571 transitions. [2021-10-06 21:20:47,431 INFO L78 Accepts]: Start accepts. Automaton has 28748 states and 180571 transitions. Word has length 26 [2021-10-06 21:20:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:20:47,431 INFO L470 AbstractCegarLoop]: Abstraction has 28748 states and 180571 transitions. [2021-10-06 21:20:47,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:20:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 28748 states and 180571 transitions. [2021-10-06 21:20:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:20:47,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:20:47,591 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:20:47,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-10-06 21:20:47,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:20:47,806 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:20:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:20:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash 492040444, now seen corresponding path program 23 times [2021-10-06 21:20:47,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:20:47,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066750284] [2021-10-06 21:20:47,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:20:47,808 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:20:47,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:20:47,809 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:20:47,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-10-06 21:20:49,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:20:49,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:20:49,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-06 21:20:49,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:20:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:20:49,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:20:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:20:50,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:20:50,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066750284] [2021-10-06 21:20:50,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066750284] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:20:50,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:20:50,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:20:50,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535282456] [2021-10-06 21:20:50,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:20:50,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:20:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:20:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:20:50,946 INFO L87 Difference]: Start difference. First operand 28748 states and 180571 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:21:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:21:41,835 INFO L93 Difference]: Finished difference Result 36730 states and 218641 transitions. [2021-10-06 21:21:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 21:21:41,837 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:21:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:21:42,085 INFO L225 Difference]: With dead ends: 36730 [2021-10-06 21:21:42,086 INFO L226 Difference]: Without dead ends: 36692 [2021-10-06 21:21:42,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 9998.2ms TimeCoverageRelationStatistics Valid=348, Invalid=1131, Unknown=3, NotChecked=0, Total=1482 [2021-10-06 21:21:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36692 states. [2021-10-06 21:21:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36692 to 29650. [2021-10-06 21:21:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29650 states, 29649 states have (on average 6.290330196633951) internal successors, (186502), 29649 states have internal predecessors, (186502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:21:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29650 states to 29650 states and 186502 transitions. [2021-10-06 21:21:44,095 INFO L78 Accepts]: Start accepts. Automaton has 29650 states and 186502 transitions. Word has length 26 [2021-10-06 21:21:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:21:44,095 INFO L470 AbstractCegarLoop]: Abstraction has 29650 states and 186502 transitions. [2021-10-06 21:21:44,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:21:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 29650 states and 186502 transitions. [2021-10-06 21:21:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:21:44,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:21:44,241 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:21:44,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-10-06 21:21:44,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:21:44,456 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:21:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:21:44,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1293815820, now seen corresponding path program 24 times [2021-10-06 21:21:44,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:21:44,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575339950] [2021-10-06 21:21:44,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:21:44,459 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:21:44,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:21:44,460 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:21:44,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-10-06 21:21:45,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-06 21:21:45,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:21:45,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-06 21:21:45,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:21:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:21:46,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:21:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:21:47,930 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:21:47,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575339950] [2021-10-06 21:21:47,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575339950] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:21:47,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:21:47,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:21:47,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006291040] [2021-10-06 21:21:47,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:21:47,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:21:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:21:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:21:47,932 INFO L87 Difference]: Start difference. First operand 29650 states and 186502 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:22:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:22:43,805 INFO L93 Difference]: Finished difference Result 40862 states and 240468 transitions. [2021-10-06 21:22:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-06 21:22:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:22:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:22:44,248 INFO L225 Difference]: With dead ends: 40862 [2021-10-06 21:22:44,248 INFO L226 Difference]: Without dead ends: 40862 [2021-10-06 21:22:44,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 11204.0ms TimeCoverageRelationStatistics Valid=390, Invalid=1167, Unknown=3, NotChecked=0, Total=1560 [2021-10-06 21:22:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40862 states. [2021-10-06 21:22:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40862 to 31160. [2021-10-06 21:22:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31160 states, 31159 states have (on average 6.302512917616098) internal successors, (196380), 31159 states have internal predecessors, (196380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:22:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31160 states to 31160 states and 196380 transitions. [2021-10-06 21:22:45,712 INFO L78 Accepts]: Start accepts. Automaton has 31160 states and 196380 transitions. Word has length 26 [2021-10-06 21:22:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:22:45,712 INFO L470 AbstractCegarLoop]: Abstraction has 31160 states and 196380 transitions. [2021-10-06 21:22:45,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:22:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 31160 states and 196380 transitions. [2021-10-06 21:22:46,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:22:46,190 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:22:46,191 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:22:46,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-10-06 21:22:46,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:22:46,406 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:22:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:22:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1136662218, now seen corresponding path program 25 times [2021-10-06 21:22:46,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:22:46,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352862968] [2021-10-06 21:22:46,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:22:46,408 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:22:46,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:22:46,409 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:22:46,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-10-06 21:22:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:22:47,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:22:47,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:22:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:22:48,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:22:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:22:48,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:22:48,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352862968] [2021-10-06 21:22:48,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352862968] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:22:48,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:22:48,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:22:48,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186866124] [2021-10-06 21:22:48,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:22:48,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:22:48,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:22:48,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:22:48,718 INFO L87 Difference]: Start difference. First operand 31160 states and 196380 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:22:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:22:53,370 INFO L93 Difference]: Finished difference Result 43996 states and 257176 transitions. [2021-10-06 21:22:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 21:22:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:22:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:22:53,981 INFO L225 Difference]: With dead ends: 43996 [2021-10-06 21:22:53,981 INFO L226 Difference]: Without dead ends: 43996 [2021-10-06 21:22:53,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2612.4ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-10-06 21:22:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43996 states. [2021-10-06 21:22:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43996 to 32726. [2021-10-06 21:22:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32726 states, 32725 states have (on average 6.3301145912910615) internal successors, (207153), 32725 states have internal predecessors, (207153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:22:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32726 states to 32726 states and 207153 transitions. [2021-10-06 21:22:56,051 INFO L78 Accepts]: Start accepts. Automaton has 32726 states and 207153 transitions. Word has length 26 [2021-10-06 21:22:56,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:22:56,051 INFO L470 AbstractCegarLoop]: Abstraction has 32726 states and 207153 transitions. [2021-10-06 21:22:56,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:22:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 32726 states and 207153 transitions. [2021-10-06 21:22:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:22:56,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:22:56,163 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:22:56,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2021-10-06 21:22:56,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:22:56,363 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:22:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:22:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1510015024, now seen corresponding path program 26 times [2021-10-06 21:22:56,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:22:56,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819254898] [2021-10-06 21:22:56,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:22:56,366 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:22:56,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:22:56,367 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:22:56,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-10-06 21:22:58,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:22:58,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:22:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:22:58,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:22:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:22:58,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:22:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:22:58,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:22:58,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819254898] [2021-10-06 21:22:58,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819254898] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:22:58,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:22:58,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:22:58,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419162685] [2021-10-06 21:22:58,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:22:58,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:22:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:22:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:22:58,997 INFO L87 Difference]: Start difference. First operand 32726 states and 207153 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:23:05,485 INFO L93 Difference]: Finished difference Result 40798 states and 245195 transitions. [2021-10-06 21:23:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-06 21:23:05,486 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:23:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:23:05,716 INFO L225 Difference]: With dead ends: 40798 [2021-10-06 21:23:05,716 INFO L226 Difference]: Without dead ends: 40770 [2021-10-06 21:23:05,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2162.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 21:23:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40770 states. [2021-10-06 21:23:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40770 to 34054. [2021-10-06 21:23:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34054 states, 34053 states have (on average 6.338149355416556) internal successors, (215833), 34053 states have internal predecessors, (215833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34054 states to 34054 states and 215833 transitions. [2021-10-06 21:23:07,496 INFO L78 Accepts]: Start accepts. Automaton has 34054 states and 215833 transitions. Word has length 26 [2021-10-06 21:23:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:23:07,496 INFO L470 AbstractCegarLoop]: Abstraction has 34054 states and 215833 transitions. [2021-10-06 21:23:07,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 34054 states and 215833 transitions. [2021-10-06 21:23:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:23:07,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:23:07,992 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:23:08,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2021-10-06 21:23:08,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:23:08,206 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:23:08,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:23:08,206 INFO L82 PathProgramCache]: Analyzing trace with hash -674349152, now seen corresponding path program 27 times [2021-10-06 21:23:08,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:23:08,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961558261] [2021-10-06 21:23:08,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:23:08,208 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:23:08,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:23:08,209 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:23:08,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-10-06 21:23:09,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:23:09,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:23:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:23:09,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:23:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:23:10,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:23:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:23:10,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:23:10,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961558261] [2021-10-06 21:23:10,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961558261] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:23:10,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:23:10,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:23:10,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896286195] [2021-10-06 21:23:10,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:23:10,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:23:10,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:23:10,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:23:10,738 INFO L87 Difference]: Start difference. First operand 34054 states and 215833 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:23:17,618 INFO L93 Difference]: Finished difference Result 44018 states and 262525 transitions. [2021-10-06 21:23:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-06 21:23:17,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:23:17,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:23:18,003 INFO L225 Difference]: With dead ends: 44018 [2021-10-06 21:23:18,004 INFO L226 Difference]: Without dead ends: 43992 [2021-10-06 21:23:18,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 3265.0ms TimeCoverageRelationStatistics Valid=349, Invalid=1907, Unknown=0, NotChecked=0, Total=2256 [2021-10-06 21:23:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43992 states. [2021-10-06 21:23:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43992 to 34946. [2021-10-06 21:23:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34946 states, 34945 states have (on average 6.343797395907855) internal successors, (221684), 34945 states have internal predecessors, (221684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34946 states to 34946 states and 221684 transitions. [2021-10-06 21:23:20,117 INFO L78 Accepts]: Start accepts. Automaton has 34946 states and 221684 transitions. Word has length 26 [2021-10-06 21:23:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:23:20,117 INFO L470 AbstractCegarLoop]: Abstraction has 34946 states and 221684 transitions. [2021-10-06 21:23:20,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 34946 states and 221684 transitions. [2021-10-06 21:23:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:23:20,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:23:20,249 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:23:20,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-10-06 21:23:20,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:23:20,450 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:23:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:23:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash -190623184, now seen corresponding path program 28 times [2021-10-06 21:23:20,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:23:20,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415746969] [2021-10-06 21:23:20,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:23:20,452 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:23:20,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:23:20,453 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:23:20,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-10-06 21:23:22,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:23:22,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:23:22,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:23:22,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:23:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:23:22,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:23:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:23:23,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:23:23,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415746969] [2021-10-06 21:23:23,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415746969] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:23:23,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:23:23,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:23:23,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969763739] [2021-10-06 21:23:23,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:23:23,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:23:23,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:23:23,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:23:23,061 INFO L87 Difference]: Start difference. First operand 34946 states and 221684 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:28,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:23:28,580 INFO L93 Difference]: Finished difference Result 48554 states and 284905 transitions. [2021-10-06 21:23:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 21:23:28,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:23:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:23:28,887 INFO L225 Difference]: With dead ends: 48554 [2021-10-06 21:23:28,888 INFO L226 Difference]: Without dead ends: 48554 [2021-10-06 21:23:28,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2987.1ms TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 21:23:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48554 states. [2021-10-06 21:23:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48554 to 35156. [2021-10-06 21:23:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35156 states, 35155 states have (on average 6.345327833878538) internal successors, (223070), 35155 states have internal predecessors, (223070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35156 states to 35156 states and 223070 transitions. [2021-10-06 21:23:31,174 INFO L78 Accepts]: Start accepts. Automaton has 35156 states and 223070 transitions. Word has length 26 [2021-10-06 21:23:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:23:31,175 INFO L470 AbstractCegarLoop]: Abstraction has 35156 states and 223070 transitions. [2021-10-06 21:23:31,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 35156 states and 223070 transitions. [2021-10-06 21:23:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:23:31,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:23:31,369 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:23:31,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-10-06 21:23:31,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:23:31,578 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:23:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:23:31,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1896814869, now seen corresponding path program 29 times [2021-10-06 21:23:31,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:23:31,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232301895] [2021-10-06 21:23:31,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:23:31,580 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:23:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:23:31,583 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:23:31,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-10-06 21:23:33,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-06 21:23:33,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:23:33,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:23:33,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:23:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:23:33,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:23:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:23:34,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:23:34,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232301895] [2021-10-06 21:23:34,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232301895] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:23:34,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:23:34,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-06 21:23:34,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042145975] [2021-10-06 21:23:34,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:23:34,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:23:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:23:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:23:34,197 INFO L87 Difference]: Start difference. First operand 35156 states and 223070 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:23:44,523 INFO L93 Difference]: Finished difference Result 50800 states and 297403 transitions. [2021-10-06 21:23:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-06 21:23:44,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:23:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:23:44,887 INFO L225 Difference]: With dead ends: 50800 [2021-10-06 21:23:44,887 INFO L226 Difference]: Without dead ends: 50800 [2021-10-06 21:23:44,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3148.9ms TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2021-10-06 21:23:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50800 states. [2021-10-06 21:23:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50800 to 36866. [2021-10-06 21:23:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36866 states, 36865 states have (on average 6.368235453682354) internal successors, (234765), 36865 states have internal predecessors, (234765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36866 states to 36866 states and 234765 transitions. [2021-10-06 21:23:47,103 INFO L78 Accepts]: Start accepts. Automaton has 36866 states and 234765 transitions. Word has length 26 [2021-10-06 21:23:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:23:47,103 INFO L470 AbstractCegarLoop]: Abstraction has 36866 states and 234765 transitions. [2021-10-06 21:23:47,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 36866 states and 234765 transitions. [2021-10-06 21:23:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:23:47,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:23:47,228 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:23:47,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2021-10-06 21:23:47,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:23:47,429 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:23:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:23:47,430 INFO L82 PathProgramCache]: Analyzing trace with hash -952492431, now seen corresponding path program 30 times [2021-10-06 21:23:47,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:23:47,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236760145] [2021-10-06 21:23:47,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:23:47,431 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:23:47,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:23:47,433 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:23:47,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-10-06 21:23:49,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:23:49,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:23:49,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:23:49,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:23:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:23:49,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:23:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:23:50,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:23:50,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236760145] [2021-10-06 21:23:50,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236760145] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:23:50,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:23:50,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:23:50,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398118245] [2021-10-06 21:23:50,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:23:50,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:23:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:23:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:23:50,399 INFO L87 Difference]: Start difference. First operand 36866 states and 234765 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:23:55,610 INFO L93 Difference]: Finished difference Result 45154 states and 273168 transitions. [2021-10-06 21:23:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 21:23:55,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:23:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:23:55,852 INFO L225 Difference]: With dead ends: 45154 [2021-10-06 21:23:55,852 INFO L226 Difference]: Without dead ends: 45116 [2021-10-06 21:23:55,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2580.5ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:23:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45116 states. [2021-10-06 21:23:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45116 to 37058. [2021-10-06 21:23:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37058 states, 37057 states have (on average 6.3476536147016756) internal successors, (235225), 37057 states have internal predecessors, (235225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37058 states to 37058 states and 235225 transitions. [2021-10-06 21:23:57,907 INFO L78 Accepts]: Start accepts. Automaton has 37058 states and 235225 transitions. Word has length 26 [2021-10-06 21:23:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:23:57,908 INFO L470 AbstractCegarLoop]: Abstraction has 37058 states and 235225 transitions. [2021-10-06 21:23:57,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:23:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 37058 states and 235225 transitions. [2021-10-06 21:23:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:23:58,023 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:23:58,023 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:23:58,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-10-06 21:23:58,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:23:58,225 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:23:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:23:58,225 INFO L82 PathProgramCache]: Analyzing trace with hash -259509664, now seen corresponding path program 31 times [2021-10-06 21:23:58,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:23:58,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753460295] [2021-10-06 21:23:58,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:23:58,227 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:23:58,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:23:58,229 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:23:58,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-10-06 21:23:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:23:59,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:23:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:24:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:00,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:24:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:00,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:24:00,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753460295] [2021-10-06 21:24:00,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753460295] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:24:00,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:24:00,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:24:00,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793049575] [2021-10-06 21:24:00,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:24:00,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:24:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:24:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:24:00,860 INFO L87 Difference]: Start difference. First operand 37058 states and 235225 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:24:06,445 INFO L93 Difference]: Finished difference Result 44830 states and 274677 transitions. [2021-10-06 21:24:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-06 21:24:06,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:24:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:24:06,717 INFO L225 Difference]: With dead ends: 44830 [2021-10-06 21:24:06,718 INFO L226 Difference]: Without dead ends: 44780 [2021-10-06 21:24:06,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1804.2ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 21:24:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44780 states. [2021-10-06 21:24:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44780 to 39414. [2021-10-06 21:24:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39414 states, 39413 states have (on average 6.3502397686042675) internal successors, (250282), 39413 states have internal predecessors, (250282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39414 states to 39414 states and 250282 transitions. [2021-10-06 21:24:09,194 INFO L78 Accepts]: Start accepts. Automaton has 39414 states and 250282 transitions. Word has length 26 [2021-10-06 21:24:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:24:09,195 INFO L470 AbstractCegarLoop]: Abstraction has 39414 states and 250282 transitions. [2021-10-06 21:24:09,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 39414 states and 250282 transitions. [2021-10-06 21:24:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:24:09,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:24:09,791 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:24:09,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2021-10-06 21:24:10,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:24:10,006 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:24:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:24:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash 224216304, now seen corresponding path program 32 times [2021-10-06 21:24:10,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:24:10,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658827638] [2021-10-06 21:24:10,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:24:10,008 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:24:10,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:24:10,020 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:24:10,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-10-06 21:24:11,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:24:11,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:24:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:24:11,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:24:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:12,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:24:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:12,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:24:12,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658827638] [2021-10-06 21:24:12,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658827638] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:24:12,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:24:12,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:24:12,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324330014] [2021-10-06 21:24:12,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:24:12,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:24:12,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:24:12,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:24:12,663 INFO L87 Difference]: Start difference. First operand 39414 states and 250282 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:24:21,548 INFO L93 Difference]: Finished difference Result 50418 states and 302568 transitions. [2021-10-06 21:24:21,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-06 21:24:21,549 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:24:21,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:24:22,134 INFO L225 Difference]: With dead ends: 50418 [2021-10-06 21:24:22,135 INFO L226 Difference]: Without dead ends: 50418 [2021-10-06 21:24:22,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 3493.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1509, Unknown=0, NotChecked=0, Total=1892 [2021-10-06 21:24:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50418 states. [2021-10-06 21:24:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50418 to 40794. [2021-10-06 21:24:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40794 states, 40793 states have (on average 6.365699997548599) internal successors, (259676), 40793 states have internal predecessors, (259676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40794 states to 40794 states and 259676 transitions. [2021-10-06 21:24:24,518 INFO L78 Accepts]: Start accepts. Automaton has 40794 states and 259676 transitions. Word has length 26 [2021-10-06 21:24:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:24:24,518 INFO L470 AbstractCegarLoop]: Abstraction has 40794 states and 259676 transitions. [2021-10-06 21:24:24,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 40794 states and 259676 transitions. [2021-10-06 21:24:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:24:24,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:24:24,712 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:24:24,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-10-06 21:24:24,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:24:24,913 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:24:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:24:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1888212326, now seen corresponding path program 33 times [2021-10-06 21:24:24,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:24:24,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532832166] [2021-10-06 21:24:24,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:24:24,914 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:24:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:24:24,916 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:24:24,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-10-06 21:24:26,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:24:26,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:24:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:24:26,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:24:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:26,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:24:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:27,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:24:27,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532832166] [2021-10-06 21:24:27,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532832166] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:24:27,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:24:27,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:24:27,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801375933] [2021-10-06 21:24:27,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:24:27,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:24:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:24:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:24:27,829 INFO L87 Difference]: Start difference. First operand 40794 states and 259676 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:24:33,805 INFO L93 Difference]: Finished difference Result 51894 states and 311528 transitions. [2021-10-06 21:24:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 21:24:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:24:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:24:34,201 INFO L225 Difference]: With dead ends: 51894 [2021-10-06 21:24:34,201 INFO L226 Difference]: Without dead ends: 51894 [2021-10-06 21:24:34,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 3337.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1111, Unknown=0, NotChecked=0, Total=1406 [2021-10-06 21:24:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51894 states. [2021-10-06 21:24:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51894 to 42026. [2021-10-06 21:24:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42026 states, 42025 states have (on average 6.378179654967282) internal successors, (268043), 42025 states have internal predecessors, (268043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42026 states to 42026 states and 268043 transitions. [2021-10-06 21:24:36,584 INFO L78 Accepts]: Start accepts. Automaton has 42026 states and 268043 transitions. Word has length 26 [2021-10-06 21:24:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:24:36,584 INFO L470 AbstractCegarLoop]: Abstraction has 42026 states and 268043 transitions. [2021-10-06 21:24:36,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:36,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42026 states and 268043 transitions. [2021-10-06 21:24:37,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:24:37,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:24:37,162 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:24:37,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-10-06 21:24:37,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:24:37,376 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:24:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:24:37,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1345976880, now seen corresponding path program 34 times [2021-10-06 21:24:37,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:24:37,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879772992] [2021-10-06 21:24:37,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:24:37,377 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:24:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:24:37,378 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:24:37,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-10-06 21:24:38,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:24:38,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:24:38,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:24:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:24:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:39,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:24:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:39,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:24:39,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879772992] [2021-10-06 21:24:39,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879772992] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:24:39,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:24:39,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:24:39,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476049453] [2021-10-06 21:24:39,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:24:39,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:24:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:24:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:24:39,809 INFO L87 Difference]: Start difference. First operand 42026 states and 268043 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:24:45,574 INFO L93 Difference]: Finished difference Result 52390 states and 318469 transitions. [2021-10-06 21:24:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 21:24:45,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-06 21:24:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:24:46,283 INFO L225 Difference]: With dead ends: 52390 [2021-10-06 21:24:46,283 INFO L226 Difference]: Without dead ends: 52390 [2021-10-06 21:24:46,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2219.1ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 21:24:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52390 states. [2021-10-06 21:24:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52390 to 43730. [2021-10-06 21:24:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43730 states, 43729 states have (on average 6.385533627569805) internal successors, (279233), 43729 states have internal predecessors, (279233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43730 states to 43730 states and 279233 transitions. [2021-10-06 21:24:48,819 INFO L78 Accepts]: Start accepts. Automaton has 43730 states and 279233 transitions. Word has length 26 [2021-10-06 21:24:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:24:48,820 INFO L470 AbstractCegarLoop]: Abstraction has 43730 states and 279233 transitions. [2021-10-06 21:24:48,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 43730 states and 279233 transitions. [2021-10-06 21:24:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:24:49,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:24:49,015 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:24:49,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2021-10-06 21:24:49,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:24:49,216 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:24:49,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:24:49,217 INFO L82 PathProgramCache]: Analyzing trace with hash -211851290, now seen corresponding path program 15 times [2021-10-06 21:24:49,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:24:49,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973842559] [2021-10-06 21:24:49,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:24:49,218 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:24:49,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:24:49,220 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:24:49,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-10-06 21:24:51,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:24:51,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:24:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:24:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:24:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:51,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:24:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:24:51,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:24:51,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973842559] [2021-10-06 21:24:51,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973842559] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:24:51,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:24:51,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:24:51,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076520173] [2021-10-06 21:24:51,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:24:51,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:24:51,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:24:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:24:51,893 INFO L87 Difference]: Start difference. First operand 43730 states and 279233 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:24:55,873 INFO L93 Difference]: Finished difference Result 72406 states and 425634 transitions. [2021-10-06 21:24:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 21:24:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-06 21:24:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:24:56,414 INFO L225 Difference]: With dead ends: 72406 [2021-10-06 21:24:56,414 INFO L226 Difference]: Without dead ends: 72364 [2021-10-06 21:24:56,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2009.2ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-10-06 21:24:56,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72364 states. [2021-10-06 21:24:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72364 to 50060. [2021-10-06 21:24:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50060 states, 50059 states have (on average 6.315627559479814) internal successors, (316154), 50059 states have internal predecessors, (316154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50060 states to 50060 states and 316154 transitions. [2021-10-06 21:24:59,716 INFO L78 Accepts]: Start accepts. Automaton has 50060 states and 316154 transitions. Word has length 26 [2021-10-06 21:24:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:24:59,717 INFO L470 AbstractCegarLoop]: Abstraction has 50060 states and 316154 transitions. [2021-10-06 21:24:59,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:24:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 50060 states and 316154 transitions. [2021-10-06 21:24:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:24:59,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:24:59,920 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:24:59,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-10-06 21:25:00,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:25:00,121 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:25:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:25:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash -658778223, now seen corresponding path program 16 times [2021-10-06 21:25:00,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:25:00,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284499139] [2021-10-06 21:25:00,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:25:00,123 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:25:00,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:25:00,125 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:25:00,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-10-06 21:25:01,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:25:01,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:25:01,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:25:01,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:25:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:25:02,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:25:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:25:02,902 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:25:02,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284499139] [2021-10-06 21:25:02,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284499139] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:25:02,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:25:02,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:25:02,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825661708] [2021-10-06 21:25:02,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:25:02,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:25:02,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:25:02,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:25:02,904 INFO L87 Difference]: Start difference. First operand 50060 states and 316154 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:25:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:25:09,300 INFO L93 Difference]: Finished difference Result 82584 states and 493353 transitions. [2021-10-06 21:25:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-06 21:25:09,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-06 21:25:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:25:10,356 INFO L225 Difference]: With dead ends: 82584 [2021-10-06 21:25:10,356 INFO L226 Difference]: Without dead ends: 82548 [2021-10-06 21:25:10,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1933.1ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-10-06 21:25:10,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82548 states. [2021-10-06 21:25:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82548 to 56446. [2021-10-06 21:25:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56446 states, 56445 states have (on average 6.431145362742493) internal successors, (363006), 56445 states have internal predecessors, (363006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:25:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56446 states to 56446 states and 363006 transitions. [2021-10-06 21:25:14,498 INFO L78 Accepts]: Start accepts. Automaton has 56446 states and 363006 transitions. Word has length 26 [2021-10-06 21:25:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:25:14,498 INFO L470 AbstractCegarLoop]: Abstraction has 56446 states and 363006 transitions. [2021-10-06 21:25:14,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:25:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 56446 states and 363006 transitions. [2021-10-06 21:25:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:25:14,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:25:14,757 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:25:14,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2021-10-06 21:25:14,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:25:14,959 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:25:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:25:14,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1269609957, now seen corresponding path program 17 times [2021-10-06 21:25:14,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:25:14,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452450891] [2021-10-06 21:25:14,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:25:14,961 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:25:14,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:25:14,962 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:25:14,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-10-06 21:25:16,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-06 21:25:16,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:25:16,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:25:16,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:25:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:25:16,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:25:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:25:17,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:25:17,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452450891] [2021-10-06 21:25:17,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452450891] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:25:17,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:25:17,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-06 21:25:17,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608636360] [2021-10-06 21:25:17,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:25:17,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:25:17,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:25:17,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:25:17,192 INFO L87 Difference]: Start difference. First operand 56446 states and 363006 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:25:24,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:25:24,804 INFO L93 Difference]: Finished difference Result 112642 states and 655975 transitions. [2021-10-06 21:25:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-06 21:25:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-06 21:25:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:25:25,902 INFO L225 Difference]: With dead ends: 112642 [2021-10-06 21:25:25,903 INFO L226 Difference]: Without dead ends: 112642 [2021-10-06 21:25:25,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 3445.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1509, Unknown=0, NotChecked=0, Total=1892 [2021-10-06 21:25:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112642 states. [2021-10-06 21:25:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112642 to 59450. [2021-10-06 21:25:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59450 states, 59449 states have (on average 6.494726572356138) internal successors, (386105), 59449 states have internal predecessors, (386105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)