/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/clever.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 20:23:15,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 20:23:15,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 20:23:15,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 20:23:15,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 20:23:15,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 20:23:15,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 20:23:15,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 20:23:15,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 20:23:15,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 20:23:15,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 20:23:15,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 20:23:15,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 20:23:15,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 20:23:15,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 20:23:15,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 20:23:15,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 20:23:15,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 20:23:15,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 20:23:15,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 20:23:15,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 20:23:15,636 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 20:23:15,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 20:23:15,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 20:23:15,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 20:23:15,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 20:23:15,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 20:23:15,642 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 20:23:15,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 20:23:15,643 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 20:23:15,643 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 20:23:15,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 20:23:15,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 20:23:15,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 20:23:15,645 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 20:23:15,645 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 20:23:15,645 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 20:23:15,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 20:23:15,646 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 20:23:15,646 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 20:23:15,646 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 20:23:15,646 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 20:23:15,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 20:23:15,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 20:23:15,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 20:23:15,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 20:23:15,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 20:23:15,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 20:23:15,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 20:23:15,648 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 20:23:15,648 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 20:23:15,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 20:23:15,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 20:23:15,649 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 20:23:16,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 20:23:16,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 20:23:16,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 20:23:16,074 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 20:23:16,077 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 20:23:16,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/clever.wvr.c [2021-10-13 20:23:16,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c78cf02bb/7ae1b03cb8da4cc1b0f78fd9b95d97e8/FLAGa51e2dc35 [2021-10-13 20:23:16,886 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 20:23:16,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2021-10-13 20:23:16,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c78cf02bb/7ae1b03cb8da4cc1b0f78fd9b95d97e8/FLAGa51e2dc35 [2021-10-13 20:23:16,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c78cf02bb/7ae1b03cb8da4cc1b0f78fd9b95d97e8 [2021-10-13 20:23:16,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 20:23:16,940 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 20:23:16,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 20:23:16,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 20:23:16,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 20:23:16,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:23:16" (1/1) ... [2021-10-13 20:23:16,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5a8d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:16, skipping insertion in model container [2021-10-13 20:23:16,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:23:16" (1/1) ... [2021-10-13 20:23:16,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 20:23:16,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 20:23:17,216 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/clever.wvr.c[2133,2146] [2021-10-13 20:23:17,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 20:23:17,235 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 20:23:17,259 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/clever.wvr.c[2133,2146] [2021-10-13 20:23:17,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 20:23:17,280 INFO L208 MainTranslator]: Completed translation [2021-10-13 20:23:17,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17 WrapperNode [2021-10-13 20:23:17,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 20:23:17,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 20:23:17,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 20:23:17,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 20:23:17,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 20:23:17,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 20:23:17,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 20:23:17,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 20:23:17,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 20:23:17,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 20:23:17,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 20:23:17,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 20:23:17,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (1/1) ... [2021-10-13 20:23:17,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 20:23:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 20:23:17,419 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) [2021-10-13 20:23:17,438 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 [2021-10-13 20:23:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 20:23:17,484 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 20:23:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 20:23:17,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 20:23:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 20:23:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 20:23:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 20:23:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 20:23:17,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 20:23:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 20:23:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 20:23:17,488 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 20:23:17,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 20:23:17,960 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 20:23:17,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:23:17 BoogieIcfgContainer [2021-10-13 20:23:17,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 20:23:17,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 20:23:17,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 20:23:17,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 20:23:17,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:23:16" (1/3) ... [2021-10-13 20:23:17,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af4ed11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:23:17, skipping insertion in model container [2021-10-13 20:23:17,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:23:17" (2/3) ... [2021-10-13 20:23:17,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af4ed11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:23:17, skipping insertion in model container [2021-10-13 20:23:17,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:23:17" (3/3) ... [2021-10-13 20:23:17,973 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2021-10-13 20:23:17,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 20:23:17,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-13 20:23:17,980 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 20:23:18,019 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,020 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,020 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,020 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,021 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,021 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,021 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,022 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,022 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,022 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,022 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,023 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,023 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,023 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,023 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,024 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,024 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,024 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,024 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,025 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,025 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,025 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,026 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,026 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,026 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,027 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,027 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,027 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,028 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,028 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,028 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,028 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,032 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,033 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,033 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,039 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,039 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:23:18,046 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 20:23:18,109 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 20:23:18,118 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 [2021-10-13 20:23:18,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-10-13 20:23:18,138 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 20:23:18,151 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 118 transitions, 252 flow [2021-10-13 20:23:18,155 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 118 transitions, 252 flow [2021-10-13 20:23:18,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 118 transitions, 252 flow [2021-10-13 20:23:18,245 INFO L129 PetriNetUnfolder]: 9/116 cut-off events. [2021-10-13 20:23:18,245 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 20:23:18,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 116 events. 9/116 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2021-10-13 20:23:18,253 INFO L116 LiptonReduction]: Number of co-enabled transitions 972 [2021-10-13 20:23:29,131 INFO L131 LiptonReduction]: Checked pairs total: 1053 [2021-10-13 20:23:29,131 INFO L133 LiptonReduction]: Total number of compositions: 124 [2021-10-13 20:23:29,141 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 27 transitions, 70 flow [2021-10-13 20:23:29,155 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 51 states, 41 states have (on average 3.048780487804878) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 41 states have (on average 3.048780487804878) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-13 20:23:29,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:29,163 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-13 20:23:29,164 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash 456, now seen corresponding path program 1 times [2021-10-13 20:23:29,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:29,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256483745] [2021-10-13 20:23:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:29,185 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:29,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:29,194 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) [2021-10-13 20:23:29,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 20:23:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 20:23:29,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:29,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:29,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:29,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256483745] [2021-10-13 20:23:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256483745] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:23:29,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:23:29,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-13 20:23:29,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882708249] [2021-10-13 20:23:29,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 20:23:29,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 20:23:29,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 20:23:29,289 INFO L87 Difference]: Start difference. First operand has 51 states, 41 states have (on average 3.048780487804878) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 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) [2021-10-13 20:23:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:29,306 INFO L93 Difference]: Finished difference Result 48 states and 122 transitions. [2021-10-13 20:23:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 20:23:29,308 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 [2021-10-13 20:23:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:29,320 INFO L225 Difference]: With dead ends: 48 [2021-10-13 20:23:29,321 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 20:23:29,322 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 [2021-10-13 20:23:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 20:23:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-13 20:23:29,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 2.975609756097561) internal successors, (122), 47 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 122 transitions. [2021-10-13 20:23:29,365 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 122 transitions. Word has length 1 [2021-10-13 20:23:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:29,366 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 122 transitions. [2021-10-13 20:23:29,366 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) [2021-10-13 20:23:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 122 transitions. [2021-10-13 20:23:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 20:23:29,367 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:29,367 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 20:23:29,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:29,580 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 [2021-10-13 20:23:29,581 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash 448912, now seen corresponding path program 1 times [2021-10-13 20:23:29,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:29,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062385357] [2021-10-13 20:23:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:29,584 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:29,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:29,586 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) [2021-10-13 20:23:29,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 20:23:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 20:23:29,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:29,771 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 20:23:29,773 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-13 20:23:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:29,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:29,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:29,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062385357] [2021-10-13 20:23:29,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062385357] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:23:29,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:23:29,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 20:23:29,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483463791] [2021-10-13 20:23:29,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 20:23:29,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 20:23:29,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:23:29,865 INFO L87 Difference]: Start difference. First operand 48 states and 122 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:29,917 INFO L93 Difference]: Finished difference Result 43 states and 111 transitions. [2021-10-13 20:23:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:23:29,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 20:23:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:29,919 INFO L225 Difference]: With dead ends: 43 [2021-10-13 20:23:29,920 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 20:23:29,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:23:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 20:23:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-13 20:23:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 42 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 111 transitions. [2021-10-13 20:23:29,930 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 111 transitions. Word has length 3 [2021-10-13 20:23:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:29,931 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 111 transitions. [2021-10-13 20:23:29,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 111 transitions. [2021-10-13 20:23:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 20:23:29,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:29,932 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 20:23:29,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:30,144 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 [2021-10-13 20:23:30,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:30,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash 448913, now seen corresponding path program 1 times [2021-10-13 20:23:30,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:30,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312426242] [2021-10-13 20:23:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:30,153 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:30,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:30,158 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) [2021-10-13 20:23:30,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 20:23:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:30,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 20:23:30,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:30,341 INFO L354 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2021-10-13 20:23:30,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 38 [2021-10-13 20:23:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:30,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:30,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:30,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312426242] [2021-10-13 20:23:30,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312426242] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:23:30,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:23:30,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:23:30,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856854635] [2021-10-13 20:23:30,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:23:30,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:30,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:23:30,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:23:30,513 INFO L87 Difference]: Start difference. First operand 43 states and 111 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) [2021-10-13 20:23:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:30,540 INFO L93 Difference]: Finished difference Result 38 states and 100 transitions. [2021-10-13 20:23:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:23:30,541 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 [2021-10-13 20:23:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:30,543 INFO L225 Difference]: With dead ends: 38 [2021-10-13 20:23:30,543 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 20:23:30,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:23:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 20:23:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 20:23:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 2.857142857142857) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 100 transitions. [2021-10-13 20:23:30,551 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 100 transitions. Word has length 3 [2021-10-13 20:23:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:30,551 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 100 transitions. [2021-10-13 20:23:30,551 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) [2021-10-13 20:23:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 100 transitions. [2021-10-13 20:23:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 20:23:30,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:30,552 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 20:23:30,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:30,753 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 [2021-10-13 20:23:30,754 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash 431413127, now seen corresponding path program 1 times [2021-10-13 20:23:30,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:30,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242437818] [2021-10-13 20:23:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:30,757 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:30,762 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) [2021-10-13 20:23:30,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 20:23:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 20:23:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:30,836 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 20:23:30,837 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-13 20:23:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:30,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:30,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:30,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242437818] [2021-10-13 20:23:30,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242437818] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:23:30,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:23:30,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 20:23:30,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697702001] [2021-10-13 20:23:30,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 20:23:30,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:30,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 20:23:30,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:23:30,899 INFO L87 Difference]: Start difference. First operand 38 states and 100 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:30,917 INFO L93 Difference]: Finished difference Result 32 states and 80 transitions. [2021-10-13 20:23:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:23:30,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 20:23:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:30,919 INFO L225 Difference]: With dead ends: 32 [2021-10-13 20:23:30,919 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 20:23:30,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:23:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 20:23:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 20:23:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 80 transitions. [2021-10-13 20:23:30,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 80 transitions. Word has length 5 [2021-10-13 20:23:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:30,925 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 80 transitions. [2021-10-13 20:23:30,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 80 transitions. [2021-10-13 20:23:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 20:23:30,926 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:30,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 20:23:30,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:31,140 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 [2021-10-13 20:23:31,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:31,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:31,142 INFO L82 PathProgramCache]: Analyzing trace with hash 431413128, now seen corresponding path program 1 times [2021-10-13 20:23:31,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:31,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947425472] [2021-10-13 20:23:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:31,144 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:31,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:31,145 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) [2021-10-13 20:23:31,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 20:23:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:31,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 20:23:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:31,339 INFO L354 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2021-10-13 20:23:31,340 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 3 case distinctions, treesize of input 25 treesize of output 47 [2021-10-13 20:23:31,349 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 48 treesize of output 46 [2021-10-13 20:23:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:31,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:31,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:31,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947425472] [2021-10-13 20:23:31,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947425472] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:23:31,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:23:31,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:23:31,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349267727] [2021-10-13 20:23:31,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:23:31,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:31,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:23:31,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:23:31,583 INFO L87 Difference]: Start difference. First operand 32 states and 80 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) [2021-10-13 20:23:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:31,599 INFO L93 Difference]: Finished difference Result 26 states and 60 transitions. [2021-10-13 20:23:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:23:31,600 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 [2021-10-13 20:23:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:31,601 INFO L225 Difference]: With dead ends: 26 [2021-10-13 20:23:31,601 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 20:23:31,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:23:31,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 20:23:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 20:23:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2021-10-13 20:23:31,605 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 5 [2021-10-13 20:23:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:31,606 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2021-10-13 20:23:31,606 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) [2021-10-13 20:23:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2021-10-13 20:23:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 20:23:31,607 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:31,607 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:31,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:31,817 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 [2021-10-13 20:23:31,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:31,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:31,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1991984029, now seen corresponding path program 1 times [2021-10-13 20:23:31,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:31,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002487564] [2021-10-13 20:23:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:31,820 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:31,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:31,821 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) [2021-10-13 20:23:31,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 20:23:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 20:23:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:31,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:32,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:32,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002487564] [2021-10-13 20:23:32,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002487564] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:23:32,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:23:32,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:23:32,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387594346] [2021-10-13 20:23:32,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:23:32,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:32,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:23:32,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:23:32,042 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) 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) [2021-10-13 20:23:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:32,066 INFO L93 Difference]: Finished difference Result 49 states and 117 transitions. [2021-10-13 20:23:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:23:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) 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 11 [2021-10-13 20:23:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:32,069 INFO L225 Difference]: With dead ends: 49 [2021-10-13 20:23:32,069 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 20:23:32,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:23:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 20:23:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-13 20:23:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2021-10-13 20:23:32,089 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 11 [2021-10-13 20:23:32,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:32,090 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2021-10-13 20:23:32,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) 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) [2021-10-13 20:23:32,090 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2021-10-13 20:23:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 20:23:32,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:32,094 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:32,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:32,307 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 [2021-10-13 20:23:32,309 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:32,310 INFO L82 PathProgramCache]: Analyzing trace with hash -982075245, now seen corresponding path program 1 times [2021-10-13 20:23:32,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:32,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982850475] [2021-10-13 20:23:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:32,311 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:32,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:32,315 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) [2021-10-13 20:23:32,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 20:23:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 20:23:32,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:32,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:32,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:32,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982850475] [2021-10-13 20:23:32,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982850475] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:23:32,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:23:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 20:23:32,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015730657] [2021-10-13 20:23:32,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:23:32,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:23:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 20:23:32,527 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:32,700 INFO L93 Difference]: Finished difference Result 102 states and 236 transitions. [2021-10-13 20:23:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 20:23:32,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 20:23:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:32,703 INFO L225 Difference]: With dead ends: 102 [2021-10-13 20:23:32,703 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 20:23:32,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 20:23:32,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 20:23:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-10-13 20:23:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.490566037735849) internal successors, (132), 53 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2021-10-13 20:23:32,710 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 12 [2021-10-13 20:23:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:32,711 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2021-10-13 20:23:32,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2021-10-13 20:23:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 20:23:32,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:32,712 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:32,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:32,925 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 [2021-10-13 20:23:32,926 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:32,927 INFO L82 PathProgramCache]: Analyzing trace with hash 769993205, now seen corresponding path program 2 times [2021-10-13 20:23:32,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:32,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685797299] [2021-10-13 20:23:32,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:23:32,929 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:32,930 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) [2021-10-13 20:23:32,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 20:23:33,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:23:33,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:33,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 20:23:33,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:33,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:33,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:33,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685797299] [2021-10-13 20:23:33,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685797299] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:33,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:33,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 20:23:33,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629388737] [2021-10-13 20:23:33,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 20:23:33,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 20:23:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-13 20:23:33,254 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:33,502 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2021-10-13 20:23:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 20:23:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 20:23:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:33,504 INFO L225 Difference]: With dead ends: 122 [2021-10-13 20:23:33,504 INFO L226 Difference]: Without dead ends: 122 [2021-10-13 20:23:33,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-13 20:23:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-13 20:23:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 70. [2021-10-13 20:23:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.782608695652174) internal successors, (192), 69 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 192 transitions. [2021-10-13 20:23:33,513 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 192 transitions. Word has length 12 [2021-10-13 20:23:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:33,513 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 192 transitions. [2021-10-13 20:23:33,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 192 transitions. [2021-10-13 20:23:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 20:23:33,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:33,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:33,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:33,727 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 [2021-10-13 20:23:33,728 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1299918539, now seen corresponding path program 1 times [2021-10-13 20:23:33,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:33,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103271370] [2021-10-13 20:23:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:33,730 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:33,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:33,731 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) [2021-10-13 20:23:33,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 20:23:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:33,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 20:23:33,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:34,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:34,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:34,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103271370] [2021-10-13 20:23:34,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103271370] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:34,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:34,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 20:23:34,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717556563] [2021-10-13 20:23:34,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 20:23:34,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 20:23:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:23:34,230 INFO L87 Difference]: Start difference. First operand 70 states and 192 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:34,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:34,453 INFO L93 Difference]: Finished difference Result 150 states and 393 transitions. [2021-10-13 20:23:34,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 20:23:34,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 20:23:34,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:34,456 INFO L225 Difference]: With dead ends: 150 [2021-10-13 20:23:34,456 INFO L226 Difference]: Without dead ends: 110 [2021-10-13 20:23:34,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-10-13 20:23:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-13 20:23:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2021-10-13 20:23:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.967032967032967) internal successors, (270), 91 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 270 transitions. [2021-10-13 20:23:34,465 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 270 transitions. Word has length 14 [2021-10-13 20:23:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:34,465 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 270 transitions. [2021-10-13 20:23:34,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 270 transitions. [2021-10-13 20:23:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 20:23:34,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:34,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:34,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:34,669 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 [2021-10-13 20:23:34,670 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:34,675 INFO L82 PathProgramCache]: Analyzing trace with hash 884090658, now seen corresponding path program 1 times [2021-10-13 20:23:34,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:34,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148717865] [2021-10-13 20:23:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:34,679 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:34,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:34,680 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) [2021-10-13 20:23:34,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 20:23:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:34,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 20:23:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:23:34,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:23:35,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:35,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148717865] [2021-10-13 20:23:35,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148717865] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:35,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:35,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 20:23:35,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752678925] [2021-10-13 20:23:35,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 20:23:35,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:35,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 20:23:35,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:23:35,092 INFO L87 Difference]: Start difference. First operand 92 states and 270 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:35,294 INFO L93 Difference]: Finished difference Result 212 states and 573 transitions. [2021-10-13 20:23:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 20:23:35,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 20:23:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:35,304 INFO L225 Difference]: With dead ends: 212 [2021-10-13 20:23:35,305 INFO L226 Difference]: Without dead ends: 212 [2021-10-13 20:23:35,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-10-13 20:23:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-10-13 20:23:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 108. [2021-10-13 20:23:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.9813084112149535) internal successors, (319), 107 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 319 transitions. [2021-10-13 20:23:35,315 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 319 transitions. Word has length 14 [2021-10-13 20:23:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:35,315 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 319 transitions. [2021-10-13 20:23:35,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 319 transitions. [2021-10-13 20:23:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 20:23:35,317 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:35,317 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:35,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:35,530 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 [2021-10-13 20:23:35,530 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:35,532 INFO L82 PathProgramCache]: Analyzing trace with hash 209453045, now seen corresponding path program 2 times [2021-10-13 20:23:35,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:35,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619786286] [2021-10-13 20:23:35,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:23:35,533 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:35,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:35,534 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) [2021-10-13 20:23:35,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 20:23:35,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:23:35,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:35,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 20:23:35,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:35,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:36,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:36,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619786286] [2021-10-13 20:23:36,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619786286] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:36,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:36,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 20:23:36,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057604294] [2021-10-13 20:23:36,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 20:23:36,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 20:23:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:23:36,172 INFO L87 Difference]: Start difference. First operand 108 states and 319 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:36,821 INFO L93 Difference]: Finished difference Result 321 states and 869 transitions. [2021-10-13 20:23:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 20:23:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 20:23:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:36,825 INFO L225 Difference]: With dead ends: 321 [2021-10-13 20:23:36,825 INFO L226 Difference]: Without dead ends: 261 [2021-10-13 20:23:36,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-10-13 20:23:36,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-10-13 20:23:36,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 130. [2021-10-13 20:23:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 3.1627906976744184) internal successors, (408), 129 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 408 transitions. [2021-10-13 20:23:36,836 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 408 transitions. Word has length 14 [2021-10-13 20:23:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:36,836 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 408 transitions. [2021-10-13 20:23:36,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 408 transitions. [2021-10-13 20:23:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 20:23:36,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:36,838 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:36,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:37,051 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 [2021-10-13 20:23:37,051 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:37,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2051346601, now seen corresponding path program 3 times [2021-10-13 20:23:37,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:37,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523819029] [2021-10-13 20:23:37,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 20:23:37,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:37,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:37,054 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) [2021-10-13 20:23:37,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 20:23:37,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 20:23:37,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:37,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 20:23:37,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:37,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:37,585 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:37,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523819029] [2021-10-13 20:23:37,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523819029] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:37,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:37,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 20:23:37,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134177648] [2021-10-13 20:23:37,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 20:23:37,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:37,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 20:23:37,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:23:37,593 INFO L87 Difference]: Start difference. First operand 130 states and 408 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:37,886 INFO L93 Difference]: Finished difference Result 260 states and 782 transitions. [2021-10-13 20:23:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 20:23:37,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 20:23:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:37,889 INFO L225 Difference]: With dead ends: 260 [2021-10-13 20:23:37,889 INFO L226 Difference]: Without dead ends: 210 [2021-10-13 20:23:37,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-10-13 20:23:37,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-13 20:23:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 148. [2021-10-13 20:23:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.2653061224489797) internal successors, (480), 147 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 480 transitions. [2021-10-13 20:23:37,899 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 480 transitions. Word has length 14 [2021-10-13 20:23:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:37,899 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 480 transitions. [2021-10-13 20:23:37,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 480 transitions. [2021-10-13 20:23:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:23:37,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:37,901 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:37,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:38,113 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 [2021-10-13 20:23:38,114 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1865108394, now seen corresponding path program 1 times [2021-10-13 20:23:38,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:38,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765860827] [2021-10-13 20:23:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:23:38,116 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:38,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:38,118 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) [2021-10-13 20:23:38,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 20:23:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:38,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 20:23:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:23:38,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:23:38,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:38,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765860827] [2021-10-13 20:23:38,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765860827] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:38,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:38,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 20:23:38,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525941420] [2021-10-13 20:23:38,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 20:23:38,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 20:23:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-13 20:23:38,677 INFO L87 Difference]: Start difference. First operand 148 states and 480 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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) [2021-10-13 20:23:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:39,292 INFO L93 Difference]: Finished difference Result 256 states and 731 transitions. [2021-10-13 20:23:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 20:23:39,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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 16 [2021-10-13 20:23:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:39,295 INFO L225 Difference]: With dead ends: 256 [2021-10-13 20:23:39,296 INFO L226 Difference]: Without dead ends: 246 [2021-10-13 20:23:39,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-10-13 20:23:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-13 20:23:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 182. [2021-10-13 20:23:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 3.1988950276243093) internal successors, (579), 181 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 579 transitions. [2021-10-13 20:23:39,306 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 579 transitions. Word has length 16 [2021-10-13 20:23:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:39,306 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 579 transitions. [2021-10-13 20:23:39,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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) [2021-10-13 20:23:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 579 transitions. [2021-10-13 20:23:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:23:39,307 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:39,308 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:39,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:39,520 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 [2021-10-13 20:23:39,520 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash 985459906, now seen corresponding path program 2 times [2021-10-13 20:23:39,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:39,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848565825] [2021-10-13 20:23:39,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:23:39,523 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:39,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:39,524 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) [2021-10-13 20:23:39,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 20:23:39,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:23:39,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 20:23:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:23:39,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:23:40,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:40,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848565825] [2021-10-13 20:23:40,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848565825] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:40,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:40,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 20:23:40,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293313020] [2021-10-13 20:23:40,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 20:23:40,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:40,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 20:23:40,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-13 20:23:40,214 INFO L87 Difference]: Start difference. First operand 182 states and 579 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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) [2021-10-13 20:23:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:41,168 INFO L93 Difference]: Finished difference Result 302 states and 817 transitions. [2021-10-13 20:23:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 20:23:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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 16 [2021-10-13 20:23:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:41,173 INFO L225 Difference]: With dead ends: 302 [2021-10-13 20:23:41,173 INFO L226 Difference]: Without dead ends: 296 [2021-10-13 20:23:41,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 758.7ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-10-13 20:23:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-13 20:23:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 192. [2021-10-13 20:23:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.2146596858638743) internal successors, (614), 191 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 614 transitions. [2021-10-13 20:23:41,189 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 614 transitions. Word has length 16 [2021-10-13 20:23:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:41,191 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 614 transitions. [2021-10-13 20:23:41,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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) [2021-10-13 20:23:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 614 transitions. [2021-10-13 20:23:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:23:41,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:41,193 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:41,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-13 20:23:41,406 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 [2021-10-13 20:23:41,407 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:41,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1484024360, now seen corresponding path program 3 times [2021-10-13 20:23:41,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:41,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820567062] [2021-10-13 20:23:41,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 20:23:41,408 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:41,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:41,410 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) [2021-10-13 20:23:41,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 20:23:41,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 20:23:41,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:41,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 20:23:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:23:41,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:23:42,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:42,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820567062] [2021-10-13 20:23:42,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820567062] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:42,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:42,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 20:23:42,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873802115] [2021-10-13 20:23:42,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 20:23:42,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:42,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 20:23:42,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-13 20:23:42,053 INFO L87 Difference]: Start difference. First operand 192 states and 614 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:42,611 INFO L93 Difference]: Finished difference Result 290 states and 806 transitions. [2021-10-13 20:23:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 20:23:42,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:23:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:42,615 INFO L225 Difference]: With dead ends: 290 [2021-10-13 20:23:42,615 INFO L226 Difference]: Without dead ends: 290 [2021-10-13 20:23:42,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-10-13 20:23:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-10-13 20:23:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 200. [2021-10-13 20:23:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 3.2261306532663316) internal successors, (642), 199 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 642 transitions. [2021-10-13 20:23:42,626 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 642 transitions. Word has length 16 [2021-10-13 20:23:42,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:42,627 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 642 transitions. [2021-10-13 20:23:42,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 642 transitions. [2021-10-13 20:23:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:23:42,628 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:42,628 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:42,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:42,841 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 [2021-10-13 20:23:42,842 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1188871017, now seen corresponding path program 4 times [2021-10-13 20:23:42,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:42,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809533131] [2021-10-13 20:23:42,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 20:23:42,844 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:42,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:42,846 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) [2021-10-13 20:23:42,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 20:23:42,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 20:23:42,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:42,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 20:23:42,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:43,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:43,798 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:43,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809533131] [2021-10-13 20:23:43,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809533131] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:43,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:43,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 20:23:43,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107757681] [2021-10-13 20:23:43,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 20:23:43,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 20:23:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-13 20:23:43,800 INFO L87 Difference]: Start difference. First operand 200 states and 642 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:45,887 INFO L93 Difference]: Finished difference Result 558 states and 1642 transitions. [2021-10-13 20:23:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 20:23:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:23:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:45,892 INFO L225 Difference]: With dead ends: 558 [2021-10-13 20:23:45,892 INFO L226 Difference]: Without dead ends: 518 [2021-10-13 20:23:45,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1975.2ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-10-13 20:23:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-10-13 20:23:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 336. [2021-10-13 20:23:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.325373134328358) internal successors, (1114), 335 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1114 transitions. [2021-10-13 20:23:45,912 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1114 transitions. Word has length 16 [2021-10-13 20:23:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:45,912 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1114 transitions. [2021-10-13 20:23:45,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1114 transitions. [2021-10-13 20:23:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:23:45,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:45,914 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:45,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-13 20:23:46,126 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 [2021-10-13 20:23:46,127 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1758140309, now seen corresponding path program 5 times [2021-10-13 20:23:46,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:46,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198884216] [2021-10-13 20:23:46,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 20:23:46,130 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:46,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:46,131 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) [2021-10-13 20:23:46,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 20:23:46,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 20:23:46,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:46,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 20:23:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:46,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:23:47,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:47,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198884216] [2021-10-13 20:23:47,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198884216] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:47,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:47,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-10-13 20:23:47,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283137166] [2021-10-13 20:23:47,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 20:23:47,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:47,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 20:23:47,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-13 20:23:47,178 INFO L87 Difference]: Start difference. First operand 336 states and 1114 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:50,104 INFO L93 Difference]: Finished difference Result 704 states and 2093 transitions. [2021-10-13 20:23:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 20:23:50,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:23:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:50,111 INFO L225 Difference]: With dead ends: 704 [2021-10-13 20:23:50,111 INFO L226 Difference]: Without dead ends: 679 [2021-10-13 20:23:50,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1523.4ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-10-13 20:23:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-10-13 20:23:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 422. [2021-10-13 20:23:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.4038004750593824) internal successors, (1433), 421 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1433 transitions. [2021-10-13 20:23:50,134 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1433 transitions. Word has length 16 [2021-10-13 20:23:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:50,134 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1433 transitions. [2021-10-13 20:23:50,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1433 transitions. [2021-10-13 20:23:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:23:50,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:50,137 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:50,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:50,349 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 [2021-10-13 20:23:50,350 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:50,350 INFO L82 PathProgramCache]: Analyzing trace with hash -626016602, now seen corresponding path program 6 times [2021-10-13 20:23:50,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:50,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138917047] [2021-10-13 20:23:50,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 20:23:50,351 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:50,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:50,352 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) [2021-10-13 20:23:50,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 20:23:50,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 20:23:50,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:50,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 20:23:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:50,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:51,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:51,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138917047] [2021-10-13 20:23:51,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138917047] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:51,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:51,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 20:23:51,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171790704] [2021-10-13 20:23:51,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 20:23:51,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:51,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 20:23:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:23:51,012 INFO L87 Difference]: Start difference. First operand 422 states and 1433 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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) [2021-10-13 20:23:51,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:51,632 INFO L93 Difference]: Finished difference Result 534 states and 1767 transitions. [2021-10-13 20:23:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 20:23:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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 16 [2021-10-13 20:23:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:51,644 INFO L225 Difference]: With dead ends: 534 [2021-10-13 20:23:51,645 INFO L226 Difference]: Without dead ends: 524 [2021-10-13 20:23:51,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-13 20:23:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-10-13 20:23:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 478. [2021-10-13 20:23:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.461215932914046) internal successors, (1651), 477 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1651 transitions. [2021-10-13 20:23:51,687 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1651 transitions. Word has length 16 [2021-10-13 20:23:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:51,687 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1651 transitions. [2021-10-13 20:23:51,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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) [2021-10-13 20:23:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1651 transitions. [2021-10-13 20:23:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:23:51,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:51,690 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:51,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:51,904 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 [2021-10-13 20:23:51,904 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:51,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1405958599, now seen corresponding path program 7 times [2021-10-13 20:23:51,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:51,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816024431] [2021-10-13 20:23:51,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 20:23:51,907 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:51,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:51,909 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) [2021-10-13 20:23:51,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 20:23:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:23:52,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 20:23:52,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:52,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:52,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:52,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816024431] [2021-10-13 20:23:52,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816024431] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:52,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:52,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 20:23:52,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078564910] [2021-10-13 20:23:52,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 20:23:52,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 20:23:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-13 20:23:52,907 INFO L87 Difference]: Start difference. First operand 478 states and 1651 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:55,586 INFO L93 Difference]: Finished difference Result 775 states and 2557 transitions. [2021-10-13 20:23:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 20:23:55,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:23:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:55,594 INFO L225 Difference]: With dead ends: 775 [2021-10-13 20:23:55,594 INFO L226 Difference]: Without dead ends: 748 [2021-10-13 20:23:55,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2186.6ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 20:23:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-10-13 20:23:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 614. [2021-10-13 20:23:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.5823817292006526) internal successors, (2196), 613 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2196 transitions. [2021-10-13 20:23:55,638 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2196 transitions. Word has length 16 [2021-10-13 20:23:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:55,638 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 2196 transitions. [2021-10-13 20:23:55,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2196 transitions. [2021-10-13 20:23:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:23:55,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:55,641 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:55,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 20:23:55,858 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 [2021-10-13 20:23:55,858 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:55,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1421755612, now seen corresponding path program 8 times [2021-10-13 20:23:55,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:55,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393039944] [2021-10-13 20:23:55,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:23:55,861 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:55,863 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) [2021-10-13 20:23:55,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 20:23:56,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:23:56,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 20:23:56,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:56,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:56,485 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:56,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393039944] [2021-10-13 20:23:56,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393039944] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:56,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:56,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 20:23:56,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841320527] [2021-10-13 20:23:56,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 20:23:56,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 20:23:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-13 20:23:56,488 INFO L87 Difference]: Start difference. First operand 614 states and 2196 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:23:57,067 INFO L93 Difference]: Finished difference Result 778 states and 2647 transitions. [2021-10-13 20:23:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 20:23:57,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:23:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:23:57,075 INFO L225 Difference]: With dead ends: 778 [2021-10-13 20:23:57,075 INFO L226 Difference]: Without dead ends: 778 [2021-10-13 20:23:57,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-10-13 20:23:57,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-10-13 20:23:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 650. [2021-10-13 20:23:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.571648690292758) internal successors, (2318), 649 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2318 transitions. [2021-10-13 20:23:57,108 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2318 transitions. Word has length 16 [2021-10-13 20:23:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:23:57,108 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 2318 transitions. [2021-10-13 20:23:57,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:23:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2318 transitions. [2021-10-13 20:23:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:23:57,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:23:57,112 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:23:57,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-13 20:23:57,327 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 [2021-10-13 20:23:57,327 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:23:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:23:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash -764079017, now seen corresponding path program 9 times [2021-10-13 20:23:57,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:23:57,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776211282] [2021-10-13 20:23:57,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 20:23:57,329 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:23:57,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:23:57,330 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) [2021-10-13 20:23:57,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 20:23:57,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 20:23:57,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:23:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 20:23:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:23:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:57,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:23:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:23:58,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:23:58,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776211282] [2021-10-13 20:23:58,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776211282] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:23:58,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:23:58,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 20:23:58,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383296159] [2021-10-13 20:23:58,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 20:23:58,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:23:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 20:23:58,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-13 20:23:58,535 INFO L87 Difference]: Start difference. First operand 650 states and 2318 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:00,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:00,436 INFO L93 Difference]: Finished difference Result 911 states and 3089 transitions. [2021-10-13 20:24:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 20:24:00,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:24:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:00,444 INFO L225 Difference]: With dead ends: 911 [2021-10-13 20:24:00,444 INFO L226 Difference]: Without dead ends: 884 [2021-10-13 20:24:00,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1829.1ms TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2021-10-13 20:24:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-10-13 20:24:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 746. [2021-10-13 20:24:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.6241610738255035) internal successors, (2700), 745 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2700 transitions. [2021-10-13 20:24:00,478 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2700 transitions. Word has length 16 [2021-10-13 20:24:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:00,479 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2700 transitions. [2021-10-13 20:24:00,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2700 transitions. [2021-10-13 20:24:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:24:00,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:00,482 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:00,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:00,695 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 [2021-10-13 20:24:00,696 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:00,699 INFO L82 PathProgramCache]: Analyzing trace with hash -139087047, now seen corresponding path program 10 times [2021-10-13 20:24:00,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:00,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823229931] [2021-10-13 20:24:00,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 20:24:00,699 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:00,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:00,700 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) [2021-10-13 20:24:00,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 20:24:00,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 20:24:00,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:00,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 20:24:00,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:01,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:01,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:01,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823229931] [2021-10-13 20:24:01,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823229931] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:01,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:01,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 20:24:01,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770483643] [2021-10-13 20:24:01,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 20:24:01,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 20:24:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-13 20:24:01,695 INFO L87 Difference]: Start difference. First operand 746 states and 2700 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:03,807 INFO L93 Difference]: Finished difference Result 1168 states and 3936 transitions. [2021-10-13 20:24:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 20:24:03,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:24:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:03,815 INFO L225 Difference]: With dead ends: 1168 [2021-10-13 20:24:03,816 INFO L226 Difference]: Without dead ends: 1132 [2021-10-13 20:24:03,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1992.7ms TimeCoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2021-10-13 20:24:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-10-13 20:24:03,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 946. [2021-10-13 20:24:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.6444444444444444) internal successors, (3444), 945 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3444 transitions. [2021-10-13 20:24:03,859 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3444 transitions. Word has length 16 [2021-10-13 20:24:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:03,860 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 3444 transitions. [2021-10-13 20:24:03,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3444 transitions. [2021-10-13 20:24:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:03,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:03,864 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:03,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:04,077 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 [2021-10-13 20:24:04,077 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1184954828, now seen corresponding path program 11 times [2021-10-13 20:24:04,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:04,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210141223] [2021-10-13 20:24:04,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 20:24:04,080 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:04,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:04,081 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) [2021-10-13 20:24:04,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 20:24:04,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:24:04,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:04,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 20:24:04,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 20:24:04,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 20:24:04,515 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:04,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210141223] [2021-10-13 20:24:04,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210141223] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:04,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:04,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-13 20:24:04,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172328662] [2021-10-13 20:24:04,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 20:24:04,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:04,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 20:24:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:24:04,517 INFO L87 Difference]: Start difference. First operand 946 states and 3444 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:04,688 INFO L93 Difference]: Finished difference Result 1156 states and 3672 transitions. [2021-10-13 20:24:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 20:24:04,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 20:24:04,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:04,695 INFO L225 Difference]: With dead ends: 1156 [2021-10-13 20:24:04,695 INFO L226 Difference]: Without dead ends: 1156 [2021-10-13 20:24:04,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-13 20:24:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-10-13 20:24:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 866. [2021-10-13 20:24:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.384971098265896) internal successors, (2928), 865 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2928 transitions. [2021-10-13 20:24:04,733 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2928 transitions. Word has length 18 [2021-10-13 20:24:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:04,733 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 2928 transitions. [2021-10-13 20:24:04,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:04,734 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2928 transitions. [2021-10-13 20:24:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:04,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:04,737 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:04,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:04,950 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 [2021-10-13 20:24:04,950 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:04,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:04,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1869024583, now seen corresponding path program 12 times [2021-10-13 20:24:04,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:04,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585113043] [2021-10-13 20:24:04,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 20:24:04,952 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:04,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:04,953 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) [2021-10-13 20:24:04,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 20:24:05,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 20:24:05,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 20:24:05,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 20:24:05,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 20:24:05,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:05,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585113043] [2021-10-13 20:24:05,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585113043] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:05,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:05,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 20:24:05,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78237374] [2021-10-13 20:24:05,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 20:24:05,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 20:24:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-13 20:24:05,705 INFO L87 Difference]: Start difference. First operand 866 states and 2928 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:07,292 INFO L93 Difference]: Finished difference Result 1362 states and 4276 transitions. [2021-10-13 20:24:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 20:24:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 20:24:07,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:07,300 INFO L225 Difference]: With dead ends: 1362 [2021-10-13 20:24:07,300 INFO L226 Difference]: Without dead ends: 1358 [2021-10-13 20:24:07,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2021-10-13 20:24:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-10-13 20:24:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 986. [2021-10-13 20:24:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.369543147208122) internal successors, (3319), 985 states have internal predecessors, (3319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3319 transitions. [2021-10-13 20:24:07,359 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3319 transitions. Word has length 18 [2021-10-13 20:24:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:07,359 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 3319 transitions. [2021-10-13 20:24:07,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3319 transitions. [2021-10-13 20:24:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:07,363 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:07,364 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:07,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:07,576 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 [2021-10-13 20:24:07,577 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1465697271, now seen corresponding path program 13 times [2021-10-13 20:24:07,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:07,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042714320] [2021-10-13 20:24:07,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 20:24:07,579 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:07,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:07,580 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) [2021-10-13 20:24:07,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 20:24:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:24:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 20:24:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:08,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:09,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:09,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042714320] [2021-10-13 20:24:09,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042714320] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:09,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:09,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-13 20:24:09,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465557646] [2021-10-13 20:24:09,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 20:24:09,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 20:24:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-13 20:24:09,094 INFO L87 Difference]: Start difference. First operand 986 states and 3319 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:15,359 INFO L93 Difference]: Finished difference Result 1523 states and 4915 transitions. [2021-10-13 20:24:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-13 20:24:15,360 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 20:24:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:15,370 INFO L225 Difference]: With dead ends: 1523 [2021-10-13 20:24:15,370 INFO L226 Difference]: Without dead ends: 1496 [2021-10-13 20:24:15,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 5806.0ms TimeCoverageRelationStatistics Valid=521, Invalid=1831, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 20:24:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-10-13 20:24:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1134. [2021-10-13 20:24:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.4483671668137688) internal successors, (3907), 1133 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3907 transitions. [2021-10-13 20:24:15,421 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3907 transitions. Word has length 18 [2021-10-13 20:24:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:15,422 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 3907 transitions. [2021-10-13 20:24:15,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:15,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3907 transitions. [2021-10-13 20:24:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:15,427 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:15,427 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:15,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:15,649 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 [2021-10-13 20:24:15,649 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:15,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1525219241, now seen corresponding path program 14 times [2021-10-13 20:24:15,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:15,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462703135] [2021-10-13 20:24:15,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:24:15,651 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:15,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:15,652 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) [2021-10-13 20:24:15,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 20:24:16,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:24:16,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:16,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 20:24:16,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:24:16,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:24:16,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:16,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462703135] [2021-10-13 20:24:16,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462703135] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:16,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:16,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-10-13 20:24:16,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560871229] [2021-10-13 20:24:16,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 20:24:16,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:16,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 20:24:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-13 20:24:16,977 INFO L87 Difference]: Start difference. First operand 1134 states and 3907 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:21,131 INFO L93 Difference]: Finished difference Result 1812 states and 5711 transitions. [2021-10-13 20:24:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 20:24:21,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 20:24:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:21,145 INFO L225 Difference]: With dead ends: 1812 [2021-10-13 20:24:21,145 INFO L226 Difference]: Without dead ends: 1812 [2021-10-13 20:24:21,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 3597.1ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 20:24:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-10-13 20:24:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1356. [2021-10-13 20:24:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.4981549815498156) internal successors, (4740), 1355 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4740 transitions. [2021-10-13 20:24:21,216 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4740 transitions. Word has length 18 [2021-10-13 20:24:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:21,216 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 4740 transitions. [2021-10-13 20:24:21,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4740 transitions. [2021-10-13 20:24:21,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:21,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:21,222 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:21,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:21,435 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 [2021-10-13 20:24:21,436 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1820487333, now seen corresponding path program 15 times [2021-10-13 20:24:21,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:21,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38395346] [2021-10-13 20:24:21,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 20:24:21,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:21,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:21,439 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) [2021-10-13 20:24:21,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 20:24:21,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 20:24:21,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:21,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 20:24:21,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:24:21,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:24:22,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:22,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38395346] [2021-10-13 20:24:22,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38395346] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:22,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:22,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-13 20:24:22,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522021766] [2021-10-13 20:24:22,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 20:24:22,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 20:24:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-13 20:24:22,537 INFO L87 Difference]: Start difference. First operand 1356 states and 4740 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:26,669 INFO L93 Difference]: Finished difference Result 2174 states and 6924 transitions. [2021-10-13 20:24:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 20:24:26,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 20:24:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:26,685 INFO L225 Difference]: With dead ends: 2174 [2021-10-13 20:24:26,686 INFO L226 Difference]: Without dead ends: 2174 [2021-10-13 20:24:26,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 3270.3ms TimeCoverageRelationStatistics Valid=295, Invalid=761, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 20:24:26,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-10-13 20:24:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1584. [2021-10-13 20:24:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.5754895767530006) internal successors, (5660), 1583 states have internal predecessors, (5660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5660 transitions. [2021-10-13 20:24:26,752 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5660 transitions. Word has length 18 [2021-10-13 20:24:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:26,752 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 5660 transitions. [2021-10-13 20:24:26,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5660 transitions. [2021-10-13 20:24:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:26,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:26,757 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:26,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:26,970 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 [2021-10-13 20:24:26,971 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:26,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1068988117, now seen corresponding path program 4 times [2021-10-13 20:24:26,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:26,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412804412] [2021-10-13 20:24:26,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 20:24:26,973 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:26,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:26,974 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) [2021-10-13 20:24:26,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 20:24:27,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 20:24:27,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 20:24:27,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:27,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:28,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:28,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412804412] [2021-10-13 20:24:28,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412804412] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:28,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:28,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 20:24:28,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627507815] [2021-10-13 20:24:28,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 20:24:28,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 20:24:28,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-13 20:24:28,040 INFO L87 Difference]: Start difference. First operand 1584 states and 5660 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-10-13 20:24:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:30,664 INFO L93 Difference]: Finished difference Result 2436 states and 8360 transitions. [2021-10-13 20:24:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 20:24:30,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 18 [2021-10-13 20:24:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:30,677 INFO L225 Difference]: With dead ends: 2436 [2021-10-13 20:24:30,677 INFO L226 Difference]: Without dead ends: 2422 [2021-10-13 20:24:30,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2053.5ms TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 20:24:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-10-13 20:24:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1942. [2021-10-13 20:24:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.6439979392065944) internal successors, (7073), 1941 states have internal predecessors, (7073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 7073 transitions. [2021-10-13 20:24:30,753 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 7073 transitions. Word has length 18 [2021-10-13 20:24:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:30,753 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 7073 transitions. [2021-10-13 20:24:30,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-10-13 20:24:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 7073 transitions. [2021-10-13 20:24:30,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:30,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:30,759 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:30,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-13 20:24:30,973 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 [2021-10-13 20:24:30,973 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1400496149, now seen corresponding path program 5 times [2021-10-13 20:24:30,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:30,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274778452] [2021-10-13 20:24:30,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 20:24:30,975 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:30,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:30,976 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) [2021-10-13 20:24:30,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 20:24:31,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 20:24:31,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:31,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 20:24:31,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:31,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:32,075 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:32,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274778452] [2021-10-13 20:24:32,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274778452] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:32,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:32,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 20:24:32,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896792331] [2021-10-13 20:24:32,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 20:24:32,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:32,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 20:24:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-13 20:24:32,076 INFO L87 Difference]: Start difference. First operand 1942 states and 7073 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:33,409 INFO L93 Difference]: Finished difference Result 2163 states and 7664 transitions. [2021-10-13 20:24:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 20:24:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 20:24:33,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:33,418 INFO L225 Difference]: With dead ends: 2163 [2021-10-13 20:24:33,418 INFO L226 Difference]: Without dead ends: 2024 [2021-10-13 20:24:33,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1126.7ms TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2021-10-13 20:24:33,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-10-13 20:24:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1884. [2021-10-13 20:24:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.626128518321827) internal successors, (6828), 1883 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6828 transitions. [2021-10-13 20:24:33,475 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6828 transitions. Word has length 18 [2021-10-13 20:24:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:33,475 INFO L470 AbstractCegarLoop]: Abstraction has 1884 states and 6828 transitions. [2021-10-13 20:24:33,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6828 transitions. [2021-10-13 20:24:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:33,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:33,480 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:33,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:33,694 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 [2021-10-13 20:24:33,694 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:33,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2078634419, now seen corresponding path program 6 times [2021-10-13 20:24:33,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:33,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482879286] [2021-10-13 20:24:33,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 20:24:33,696 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:33,697 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) [2021-10-13 20:24:33,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-13 20:24:34,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 20:24:34,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 20:24:34,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:34,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:34,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:34,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482879286] [2021-10-13 20:24:34,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482879286] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:34,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:34,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-13 20:24:34,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099452634] [2021-10-13 20:24:34,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 20:24:34,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 20:24:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-13 20:24:34,853 INFO L87 Difference]: Start difference. First operand 1884 states and 6828 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:41,897 INFO L93 Difference]: Finished difference Result 3198 states and 10827 transitions. [2021-10-13 20:24:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 20:24:41,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 20:24:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:41,908 INFO L225 Difference]: With dead ends: 3198 [2021-10-13 20:24:41,908 INFO L226 Difference]: Without dead ends: 3198 [2021-10-13 20:24:41,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 5101.8ms TimeCoverageRelationStatistics Valid=516, Invalid=1646, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 20:24:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-10-13 20:24:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2516. [2021-10-13 20:24:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 3.732803180914513) internal successors, (9388), 2515 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 9388 transitions. [2021-10-13 20:24:42,016 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 9388 transitions. Word has length 18 [2021-10-13 20:24:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:42,017 INFO L470 AbstractCegarLoop]: Abstraction has 2516 states and 9388 transitions. [2021-10-13 20:24:42,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 9388 transitions. [2021-10-13 20:24:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:42,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:42,026 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:42,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:42,239 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 [2021-10-13 20:24:42,240 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:42,240 INFO L82 PathProgramCache]: Analyzing trace with hash -389092150, now seen corresponding path program 16 times [2021-10-13 20:24:42,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:42,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172463547] [2021-10-13 20:24:42,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 20:24:42,241 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:42,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:42,243 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) [2021-10-13 20:24:42,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 20:24:42,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 20:24:42,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 20:24:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:42,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:42,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:42,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172463547] [2021-10-13 20:24:42,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172463547] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 20:24:42,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 20:24:42,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-13 20:24:42,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14623108] [2021-10-13 20:24:42,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:24:42,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:24:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 20:24:42,781 INFO L87 Difference]: Start difference. First operand 2516 states and 9388 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:42,842 INFO L93 Difference]: Finished difference Result 2510 states and 9171 transitions. [2021-10-13 20:24:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 20:24:42,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 20:24:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:42,854 INFO L225 Difference]: With dead ends: 2510 [2021-10-13 20:24:42,854 INFO L226 Difference]: Without dead ends: 2462 [2021-10-13 20:24:42,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 20:24:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-10-13 20:24:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2370. [2021-10-13 20:24:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2369 states have (on average 3.662726888982693) internal successors, (8677), 2369 states have internal predecessors, (8677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 8677 transitions. [2021-10-13 20:24:42,932 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 8677 transitions. Word has length 18 [2021-10-13 20:24:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:42,932 INFO L470 AbstractCegarLoop]: Abstraction has 2370 states and 8677 transitions. [2021-10-13 20:24:42,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 8677 transitions. [2021-10-13 20:24:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 20:24:42,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:42,940 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:42,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:43,155 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 [2021-10-13 20:24:43,155 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:43,156 INFO L82 PathProgramCache]: Analyzing trace with hash -404889163, now seen corresponding path program 7 times [2021-10-13 20:24:43,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:43,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574050047] [2021-10-13 20:24:43,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 20:24:43,157 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:43,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:43,159 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) [2021-10-13 20:24:43,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 20:24:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:24:43,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 20:24:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:43,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:44,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:44,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574050047] [2021-10-13 20:24:44,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574050047] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:24:44,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:24:44,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 20:24:44,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993463825] [2021-10-13 20:24:44,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 20:24:44,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:24:44,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 20:24:44,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-13 20:24:44,273 INFO L87 Difference]: Start difference. First operand 2370 states and 8677 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:24:50,490 INFO L93 Difference]: Finished difference Result 3634 states and 12418 transitions. [2021-10-13 20:24:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 20:24:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 20:24:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:24:50,509 INFO L225 Difference]: With dead ends: 3634 [2021-10-13 20:24:50,509 INFO L226 Difference]: Without dead ends: 3622 [2021-10-13 20:24:50,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 5058.7ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 20:24:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3622 states. [2021-10-13 20:24:50,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3622 to 2960. [2021-10-13 20:24:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 3.7127407908077052) internal successors, (10986), 2959 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 10986 transitions. [2021-10-13 20:24:50,667 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 10986 transitions. Word has length 18 [2021-10-13 20:24:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:24:50,668 INFO L470 AbstractCegarLoop]: Abstraction has 2960 states and 10986 transitions. [2021-10-13 20:24:50,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:24:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 10986 transitions. [2021-10-13 20:24:50,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 20:24:50,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:24:50,676 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:24:50,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:50,890 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 [2021-10-13 20:24:50,890 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-13 20:24:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:24:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2104320187, now seen corresponding path program 17 times [2021-10-13 20:24:50,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:24:50,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748131904] [2021-10-13 20:24:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 20:24:50,892 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:24:50,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:24:50,893 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) [2021-10-13 20:24:50,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-13 20:24:51,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 20:24:51,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:51,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 20:24:51,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:51,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:51,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:24:51,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748131904] [2021-10-13 20:24:51,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 20:24:51,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1619599977] [2021-10-13 20:24:51,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 20:24:51,954 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 20:24:51,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-13 20:24:51,962 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 20:24:51,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-10-13 20:24:52,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 20:24:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 20:24:52,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:52,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:53,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 20:24:53,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109540814] [2021-10-13 20:24:53,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 20:24:53,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 20:24:53,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 20:24:53,092 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 20:24:53,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-13 20:24:53,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 20:24:53,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:24:53,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 20:24:53,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:24:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:24:53,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:24:54,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 20:24:54,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:24:54,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 20:24:54,035 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-13 20:24:54,035 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 20:24:54,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 20:24:54,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 20:24:54,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 20:24:54,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 20:24:54,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 20:24:54,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 20:24:54,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 20:24:54,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 20:24:54,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 20:24:54,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 20:24:54,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 20:24:54,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 20:24:54,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:54,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-13 20:24:54,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-10-13 20:24:54,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-10-13 20:24:54,653 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 20:24:54,653 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 20:24:54,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:24:54 BasicIcfg [2021-10-13 20:24:54,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 20:24:54,688 INFO L168 Benchmark]: Toolchain (without parser) took 97752.46 ms. Allocated memory was 153.1 MB in the beginning and 187.7 MB in the end (delta: 34.6 MB). Free memory was 126.5 MB in the beginning and 94.4 MB in the end (delta: 32.1 MB). Peak memory consumption was 67.8 MB. Max. memory is 8.0 GB. [2021-10-13 20:24:54,689 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 20:24:54,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.18 ms. Allocated memory is still 153.1 MB. Free memory was 126.2 MB in the beginning and 115.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-13 20:24:54,691 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.92 ms. Allocated memory is still 153.1 MB. Free memory was 115.5 MB in the beginning and 113.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 20:24:54,691 INFO L168 Benchmark]: Boogie Preprocessor took 38.35 ms. Allocated memory is still 153.1 MB. Free memory was 113.9 MB in the beginning and 112.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 20:24:54,695 INFO L168 Benchmark]: RCFGBuilder took 596.55 ms. Allocated memory is still 153.1 MB. Free memory was 112.5 MB in the beginning and 98.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-13 20:24:54,695 INFO L168 Benchmark]: TraceAbstraction took 96720.20 ms. Allocated memory was 153.1 MB in the beginning and 187.7 MB in the end (delta: 34.6 MB). Free memory was 98.5 MB in the beginning and 94.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 39.5 MB. Max. memory is 8.0 GB. [2021-10-13 20:24:54,697 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 337.18 ms. Allocated memory is still 153.1 MB. Free memory was 126.2 MB in the beginning and 115.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.92 ms. Allocated memory is still 153.1 MB. Free memory was 115.5 MB in the beginning and 113.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.35 ms. Allocated memory is still 153.1 MB. Free memory was 113.9 MB in the beginning and 112.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 596.55 ms. Allocated memory is still 153.1 MB. Free memory was 112.5 MB in the beginning and 98.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 96720.20 ms. Allocated memory was 153.1 MB in the beginning and 187.7 MB in the end (delta: 34.6 MB). Free memory was 98.5 MB in the beginning and 94.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 39.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10976.6ms, 116 PlacesBefore, 31 PlacesAfterwards, 118 TransitionsBefore, 27 TransitionsAfterwards, 972 CoEnabledTransitionPairs, 7 FixpointIterations, 74 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 124 TotalNumberOfCompositions, 1053 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1053, positive: 1053, positive conditional: 0, positive unconditional: 1053, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 622, positive: 622, positive conditional: 0, positive unconditional: 622, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 622, positive: 622, positive conditional: 0, positive unconditional: 622, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1053, positive: 431, positive conditional: 0, positive unconditional: 431, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 622, unknown conditional: 0, unknown unconditional: 622] , Statistics on independence cache: Total cache size (in pairs): 32, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 81]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: unable to decide satisfiability of path constraint, overapproximation of memtrack at line 81. Possible FailurePath: [L36] 0 int n, m, i1, i2, j1; [L37] 0 unsigned int k1, k2; [L60] 0 pthread_t t1, t2; [L63] 0 n = __VERIFIER_nondet_int() [L64] 0 m = __VERIFIER_nondet_int() [L65] 0 i1 = __VERIFIER_nondet_int() [L66] 0 i2 = __VERIFIER_nondet_int() [L67] 0 j1 = __VERIFIER_nondet_int() [L68] 0 k1 = __VERIFIER_nondet_uint() [L69] 0 k2 = __VERIFIER_nondet_uint() [L33] COND TRUE 0 !cond [L33] COND TRUE 0 !cond [L75] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L40] COND TRUE 1 i1 < n [L41] 1 j1 = 0 [L41] COND TRUE 1 j1 < m [L42] 1 k1++ [L41] 1 j1++ [L44] 1 i1++ [L40] COND TRUE 1 i1 < n [L41] 1 j1 = 0 [L41] COND TRUE 1 j1 < m [L42] 1 k1++ [L41] 1 j1++ [L44] 1 i1++ [L47] 1 return 0; [L76] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) [L77] 0 \read(t1) [L77] FCALL, JOIN 1 pthread_join(t1, 0) [L78] 0 \read(t2) [L51] COND TRUE 2 i2 < n [L52] 2 k2 = k2 + m [L53] 2 i2++ [L51] COND TRUE 2 i2 < n [L52] 2 k2 = k2 + m [L53] 2 i2++ [L51] COND FALSE 2 !(i2 < n) [L56] 2 return 0; [L78] FCALL, JOIN 2 pthread_join(t2, 0) [L33] COND TRUE 0 !cond [L81] 0 reach_error() - UnprovableResult [Line: 75]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 75]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 76]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 76]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 77]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 77]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 78]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 78]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 59]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 76]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 75]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 135 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 96544.2ms, OverallIterations: 33, TraceHistogramMax: 4, EmptinessCheckTime: 100.2ms, AutomataDifference: 50878.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11036.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 949 SDtfs, 3454 SDslu, 5019 SDs, 0 SdLazy, 4395 SolverSat, 787 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15366.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1136 GetRequests, 550 SyntacticMatches, 1 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3274 ImplicationChecksByTransitivity, 40373.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2960occurred in iteration=32, InterpolantAutomatonStates: 565, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1137.7ms AutomataMinimizationTime, 32 MinimizatonAttempts, 5862 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 266.8ms SsaConstructionTime, 1731.9ms SatisfiabilityAnalysisTime, 16554.2ms InterpolantComputationTime, 448 NumberOfCodeBlocks, 436 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 832 ConstructedInterpolants, 12 QuantifiedInterpolants, 7123 SizeOfPredicates, 143 NumberOfNonLiveVariables, 2103 ConjunctsInSsa, 262 ConjunctsInUnsatCore, 64 InterpolantComputations, 15 PerfectInterpolantSequences, 86/320 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 20:24:54,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...